https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=ULHUHT7NDEBXC&source=urlWATCH NEXT! Comments are mostly about PVA glue. Once a concrete surface becomes worn or damaged, you must perform repairs to stop the damage from spreading before the concrete must be removed and replaced. Fill Cracks in Plaster . Would just add that super glue works well with the same result for small imperfections. Cracked pebbledash and the new extension . Be sure to press the mortar against the edges of the damaged area as well. I know there's a special wood repair product but polyfiller, silly putty or whatever you want to call it, is so much easier to use. Can you use poly filler to fill cracks in wood? That means you’re not going to pick epoxy for every woodworking project that requires glue but there is one area in which epoxy far outshines its counterparts. This is not structural or a safety hazard so can be safely ignored or repaired with a thinly mixed jointing compound or even PVA adhesive. Simply filling over the crack isn't the answer here. Feather out the edges of the first coat while it is still wet by placing the putty knife on the left edge … Luke O'Reilly. I sawed the bottom of my door frame to fit laminate flooring. 3. Your email address will not be published. Spread the putty in the crack with a putty knife, let it dry, then sand it flat with 120-grit sandpaper. I sawed far too much and now want to fill … Remove as much as you can before applying an artist grade paste product. I find it beneficial to work with a 6 Inch Flex Knife and 3 Inch Flex Knife. So, eventually a crack starts, and over many years it slowly widens. This eventually causes a crack to develop along the line of the joint. Gradually add glue to the sawdust while mixing until a putty-like consistency is achieved. Then add a little filler (or watered down PVA). The balsa exposed areas soaked up a lot of paint and swelled a lot, and this really showed up the sanding scratches that were barely noticable before. If you would like to send me a couple of ££ to help me to keep creating this free content click here: http://bit.ly/33krghd Thanks so much!Charlie DIYte Amazon Tool Store https://www.amazon.co.uk/shop/charliediyte - all my tried, tested and much loved DIY tools are now in one place on-line.Today's Toolkit*- Bonding Coat https://amzn.to/2SXWxn2- Bonding 60 http://bit.ly/325zDya- Gyproc EasiFill 20 http://bit.ly/2uYEpBF- Gyproc Easifill 60 http://bit.ly/2SSeFPq- Gyproc Easifill (5 x 1kg bags) - Hamilton 4 piece continental filler knife set https://amzn.to/2wuExJH- Ragni Small tool https://amzn.to/39KIM1X- 25mm filling knife https://amzn.to/2uYGw8z - 50mm filling knife https://amzn.to/323gz3C- Plasterers hawk https://amzn.to/2vEvIfL- Plasterers trowel https://amzn.to/2V0ssWL- Mixing paddle https://amzn.to/3277VkA- Mixing bucket 25 litre https://amzn.to/2SFk6SW- Mixing bucket 14 litre https://amzn.to/3bMpuLp- Paint brush 25mm/ 1\" https://amzn.to/38Ftj2S- PVA https://amzn.to/2V0sVZ1- Sanding Block https://amzn.to/2uLFyfW- Oakey Liberty Green 120 grit sand paper https://amzn.to/2UXnRENUseful Links:- British Gypsum repair range http://bit.ly/38EHuWb - Thistle essential plasters (this is the page where Bonding Coat is hiding!) And, I use CA glue to fill small cracks because it is fast. Allow to dry and remove nib Wet the crack area, including edges, with diluted glue, or brush dipped in water. Take some power filler onto a mixing board (basically anything you can mix up on but don’t need anymore. – Mike Townsend . Using a Flex Filling Knife skim over the crack and wait until dry. PVA (White) Glue Polyvinyl acetate glue (PVA), also known as "White Glue", has been around since the … thewoodwhisperer July 7, 2009 11:11 am The FDA-approval pertains to the final cured product, not the glue in the liquid state. Fill surface cracks with wood putty. Spread the putty in the crack with a putty knife, let it dry, then … Add message | Report | See all. It doesn't cost you anything to click on them but I do earn a small commission if you do.And here's the legal bit I have to state: As an Amazon Associate I earn from qualifying purchases.SUBSCRIBE - you can subscribe to my Channel here:http://www.youtube.com/c/CharlieDIYteLET'S CONNECT!Charlie DIYte-- Email: charliediyte@gmail.com-- https://www.facebook.com/charliediyte-- https://charliediyte.co.uk/-- https://www.instagram.com/charliediyte/-- https://twitter.com/CharlieDIYte Sand any rough areas before moving on to the next step. PVA can simply be painted onto any surface, but as it is water based and needs to be absorbed, it will not stick two non–absorbent surfaces together. Even properly laid concrete can crack, or become pitted because of harsh weather, settling or impacts. - PVA applied just before plastering (all standard ratios) the wall after most of it has been prepped this is the area where there are some cracks - you can see it was in a bit of state! PVA (white/yellow) glue would not be my first choice if you intend to sand or otherwise have to manipulate the surface after filling the crack. Mix a 2-part epoxy adhesive to fill cracks and reattach broken pieces. How to fix cracks in ceilings and walls. Mix up more toupret filler and skim the crack again, wait until dry and move onto the last step. Here’s why: Let’s say that we have a reasonably stable building, and the settling factor happened over many years. Mix up more toupret filler and skim the crack again, wait until dry and move onto the last step. Reply . NO PVA ALWAYS use PVA first , a drop of water in it to help it move as well , not to much though this will stop the plaster cracking and help it stick better you MUST use PVA first and remember to clean up any PVA left on the surface or splashed onto any other surface like skirtings , just wipe it off with a damp cloth , rag or spomge These cracks run across the ceiling and vertically down the wall from the same point. That’s when you’re working with a substantial gap either at the join or elsewhere in the wood. Use a caulk gun to apply caulk (make sure it is paintable) into the crack. In some cases, you might need to get a little more creative, as The Carpenter’s Daughter did when plastering a wall with chased cables. When you are done with the PVA spools, be sure to remove them from your printer and place them in air-tight containers along with a desiccant to remove any moisture from the container. Make Wood Filler With Sawdust – How And Why? While this being the more common use for “wood makeup”, I find it to also be a great beginners woodworking tool. Normally you'd water down the pva and apply it, wait for to dry then plaster/fill. Thankyou very much. Add message | Report. If you continue to use this site we will assume that you are happy with it. It is not as cheap as PVA and because it comes in two parts, it’s not quite as easy to work with either. The glue goes into the crack first and the dust sprinkled on top. I find Its possible to fill cracks in flat or bagged finished render so that you can't see it. DoItTooJulia Sat 17-Aug-13 20:03:20. The way to do it is just keep a 6 inch brush in a bucker and slosh it on as you move along the wall. Filling fine lines, cracks and holes is time-consuming, but it has to be done to repair plaster. Holds firmly to plastic materials, and can be used on vellum. In regard to your other question about filling, the problem is that even if you are able to fill the cracks of the stucco/PVA layer, you are very likely to see future cracking and delamination. Vertical cracks. Be aware that the sawdust should be mixed with three times as much glue to create the filler and this must be taken into account to help to determine how much sawdust is required. 18th September 2019 at 10:08 pm. Cut the nozzle to the width of the crack and apply a bead of the mixture into the crack. Then mix in a dilution of 2 parts clean water with 1 part EVA or waterproof external grade PVA to produce a workable consistency. It is like caulk with tiny fibres, it will shrink back a lot. Remove debris and vacuum up any dust. Furthermore, the crack movement usually exceeds the elastic limits of whatever-was-used to fill the crack, even if it was not cement. Use scrap paper to test your paint colors before you put it on the sculpture to avoid having to paint the whole sculpture. Please note: It is important that the additive to water ratio is measured correctly – if the dilution is too strong, the colour of the repair will be affected. We have filled the cracks in the kitchen and they are still ok a week or two on, so fingers crossed this is the solution! Hello! Use a stiff putty knife to scrape the wall around the crack. However, the ground swelling-and-shrinkage happens seasonally. PVA that has absorbed water from the air will tend to bubble and crack during printing, which will ruin the quality and strength of the finished part. Reply. PVA tends to have water sensitivity, so if you can’t flex and peel the paste off of the canvas. You want to try to get rid of any peeling paint or small pieces of plaster that may fall off. I find it beneficial to work with a 6 Inch Flex Knife and 3 Inch Flex Knife. To correctly fix cracks in your plaster you will need a few tools to complete the job: Sharp knife; Good interior filler; Paintbrush 2 or 3″ Filling knife/scrapper; Bowl of water/PVA; Sandpaper; Once you have all the tools above you are ready to repair the crack so it does not come back the day after filling. Keep adding mortar until it makes a small, rounded mound on over the concrete surface. Do not use PVA to fill gaps in a floor, firstly it sets too hard and will be prone to crack second its too thick and will be a big pain to spread finally it can prevent the finish adhering properly or cause it to be patchy I use a resin Product called Bona Mix and Fill (google "wood finishes direct" for a supplier). Use a trowel or your hands and fill the space with mortar. Using a scraper, apply the DIY filler to the area it is to be used. Most wood fillers are intended to be little more than aesthetic solutions. Dig out cracks in plaster with a Stanley-type knife. Once you have done this in a small area around you, slight the trowel back and forth, with a fair amount of pressure, almost snow ploughing it back and forth, as shown in the video. DIY Wooden Guitar Stand With basic Power Tools. PVA (white/yellow) glue would not be my first choice if you intend to sand or otherwise have to manipulate the surface after filling the crack. By using the affiliate links, you are helping support the Woodworkjunkie.com website, and I genuinely appreciate your support. Fill a cartridge with the mixture and load into a cartridge gun. Polyfilla is rubbish for filling cracks. Step 1. The corner of a scraper or filling knife is ideal for removing any loose plaster and for opening up and deepening the crack. PVA tends to have water sensitivity, so if you can’t flex and peel the paste off of the canvas. In regard to your other question about filling, the problem is that even if you are able to fill the cracks of the stucco/PVA layer, you are very likely to see future cracking and delamination. The process involves filling the crack and after allowing the filler to cure, sanding it to a smooth, level finish. When you are done with the PVA spools, be sure to remove them from your printer and place them in air-tight containers along with a desiccant to remove any moisture from the container. Fill a cartridge with the mixture and load into a cartridge gun. Same goes for working with an ABS/acetone mixture—which forms slurries—that can also be poured into the cracks … I know there's a special wood repair product but polyfiller, silly putty or whatever you want to call it, is so much easier to use. Information on the different types of filler available is contained in the article ‘All About Fillers’. In order to determine how much wood filler you require, inspect the furniture to check the full extent of the damage that needs to be repaired. Now use the sharp point of the knife to cut into the crack. 2. This acid-free PVA glue is commonly used for most book and box making applications, adhering paper to paper, cloth to wood, leather, filling in cracks in art canvases and repairing ceramic objects. You'll also need to leave it to cure for at least a few hours after filling. Now you can just use a decorators filling knife (I have known people to do this) and use that to fill the whole floor. You also need to fill or cover any holes or cracks in the surface you’re going to plaster. In today's video I show you the best way to fill wall chases, and how to repair cracks and holes in walls. I had primer filled it, and sanded as much off as possible. How Not to Fill Cracks,Gaps And Holes In Plaster And in this other video you can see the best way https://youtu.be/X7YJYI3VDBM Small cracks in plaster should first be widened so that filler can be pushed right in and has something to key on to. The Process: working with epoxy resins—which are already liquefied—is one way to fill up structural gaps. Small holes can be patched with Polyfilla, and you can cover cracks with screen tape. admin @ woodworkjunkie.com. This article shows techniques and provides advice on how to fill gaps and hide seam lines on scale models. #2 How to Repair Wall Cracks. PVA that has absorbed water from the air will tend to bubble and crack during printing, which will ruin the quality and strength of the finished part. Small cracks in plaster should first be widened so that filler can be pushed right in and has something to key on to. I do this on wood turning projects for small cracks / knots. Small holes, hairline cracks and minor damage can be filled easily using a filler (Polyfilla being the most famous) which is put on with a filling knife or scraper. You can use a bolster chisel and club hammer instead of the filling knife if you find it easier. Once the cracks in the walls start to appear, they let water in, which then freezes and expands in the wall, pushing the coating of dash AWAY from the bricks underneath. Woodworkjunkie.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. PVA glues do not get “hard” enough to allow for such manipulation without them being gummy and ugly. doglover Sat 17-Aug-13 20:09:23. Keep adding filler until the filler is quite viscous and moves very slowly to find its level after stirring. The corner of a scraper or filling knife is ideal for removing any loose plaster and for opening up and deepening the crack. the outer skirting board has since been removed We are very slow, novice plasterers, so the PVA was probably bone dry in some areas by the time it was plastered. If you paint PVA on the walls you need to get the mix on while it is tacky. This substance is easily applied with a putty knife and can be stained to completely eliminate the appearance of gouges or dings. Once the filler is mixed, transfer onto the larger flex knife and use the smaller 3 inch one to work with. Reply. If the areas are small just paint on pva, wait for it to dry, then plaster/fill. Using a Flex Filling Knife skim over the crack and wait until dry. Squeeze the epoxy onto a non-porous disposable surface, like a thin sheet of plastic, and use a wooden or plastic stick to mix together the 2 components as quickly as possible. With a small paintbrush, dampen the crack with water to make the filler dry slowly - this helps stop it from shrinking and falling out of the crack. Shove scrunched-up newspaper into deep cracks to give the filler a base to attach itself to. I sawed the bottom of my door frame to fit laminate flooring. Vertical cracks. Even in the middle of the city, as long as you have a yard, or even just a balcony, you're guaranteed to attract birds with a birdbath. Fill the birdbath with fresh water. All you need to do is pour it into the cracks and apply some heat till it solidifies. Step 4 Repaint the sculpture when you have finished smoothing it. Thanks, DITJ. 2. Fill surface cracks with wood putty. This left small patches of areas covered, and other areas of balsa exposed. Press it down so it fills all the small holes in the concrete. Fixing Cracks In Plaster. Small holes, hairline cracks and minor damage can be filled easily using a filler (Polyfilla being the most famous) which is put on with a filling knife or scraper. I’m planning on diluting it a bit with water and use a syringe to fill the cracks. First I brush PVA in to the gap in the hope of "locking" the loose plaster. If your home contains wood furnishings, you will find that wood filler can be very useful for repairing minor damage on a range of different items. Once the crack is prepared you are ready to fill it. http://bit.ly/2vIqTlL * The Amazon links above are affiliate links. Apply to hole or crack. Repairing cracks. Scoop the mortar into the crack or hole. Plaster can crack over time purely through exposure to central heating and age. I was wondering if you guys could tell me if PVA is suitable for filling the drying cracks of a wooden mallet (the cracks are about 1 mm at the widest end). Filling cracks in render. In today's video I show you the best way to fill wall chases, and how to repair cracks and holes in walls. I forgot to use lime when rendering recently, so it’s great to get your advice. So just like film finishes, they are pretty nasty in liquid form but relatively benign once fully cured. I then over fill with Toupret Redlite and sand flat. Start by raking any loose plaster from the crack with the corner of a filling knife or scraper. When you make a purchase, the price you pay will be the same whether you use the affiliate link or go directly to the vendor’s website using a non-affiliate link. Gently turn utility knife inside crack to enlarge it slightly. Pollyfilla, not polly fills! Best to not use … This is not structural or a safety hazard so can be safely ignored or repaired with a thinly mixed jointing compound or even PVA adhesive. This eventually causes a crack to develop along the line of the joint. If you are working with wood outside, you will thus want to look to wood putty or even wood glue to fill cracks and crevices. Repairing Split Wood: In an otherwise attractive piece of wood, an unsightly split or crack can run deep like family turmoil. Decorators caulk sounds like it could be worth a try. I sawed far too much and now want to fill … Smooth if off with a filling knife and then wait for it to shrink back. Can you use poly filler to fill cracks in wood? Whether you can use wood glue to fill those holes will naturally depend on the size and nature of the hole. We use cookies to ensure that we give you the best experience on our website. Go all the way round the edge and spiral into the middle of the floor. Deep cracks I leave for a couple of days. Get a professional grade finish on your 3D prints, like Jon Watson did on this Starwars replica with our Grey PLA Your 3D prints are now coming out great & looking as they should, but then again, they're still looking like they're 3D printed. An important point to make is If the surface you are working on is external and likely to be washed with rain regularly, PVA is not the best product to use. Ensure the mixture doesn't overlay the existing render but form a protruding nib of material 2-3mm in front of the line of the existing render. How to Sand 3D Prints (& Polishing) Sanding is a simple and somewhat easy way to finish process a 3d print, depending on the material in question. Areas are no bigger than a 50 cent coin,so straight PVA it is then. Some of the links on this website are affiliate links, which means that I may earn a commission if you click on the link or make a purchase using the link. Try to undercut the crack with the corner of … The cracks need to be opened wider and preferably with clean edges. If you're mixing your filler from a powder, add a squirt of PVA adhesive to make a smooth paste that sticks really well. If the wall is very crumbly you can brush a watered down PVA sealer mix to seal it. The PVA portion is a skin, eye, and lung irritant and should not be inhaled as sanding dust. In the case of deeper cracks and holes, try to get the wood filler as deep into the crack as possible. Mix in white vinegar at a ratio of 1 part for every 4 parts water. PVA adhesive Rendering or exterior filler; 1. When exposed to the elements, wood expands, and wood filler will not expand along with it. This process gets worse and worse over time and can end up with chunks of wall actually falling off like the house we did below. Step 2. Stir it with a filling knife or stick of wood or whatever. It'll start to harden after 3 to 4 minutes, so you need to work fast. I then squirt the toupret in to the gap. These cracks run across the ceiling and vertically down the wall from the same point. 1. Clean out the crack by drawing the pointed edge of a filling knife through it to form the crack into a V. The shape will anchor the filler below the surface so that the crack is unlikely to open again. Swipe a bit of filler and fill round the edges if there are gaps or nail holes around the edge. How to Seal a Concrete Birdbath. One method of concrete surface repair is to use thinset mortar to rebuild the top layer. You need to get a scraper or another sharp edged tool and rake the crack out, give it a good clean out with a dust brush and then refill you may need to sand the first fill down and apply a second fill depending on how deep you rake it … Then scoop it out and slop it on the floor. You’ll need to cut in until you can no longer see … If you seal the crack allow the sealer to dry. Once the filler is mixed, transfer onto the larger flex knife and use the smaller 3 inch one to work with Even the hardiest fillers are intended to withstand compressive forc… Jade 403 acid-free adhesive is very useful for patching… The neater you are filling the gaps, the less sanding you'll need to do afterwards - so try to be as neat as possible. Then paint the inside of the crack with diluted pva and wait till its mostly dry. PVA glues do not get “hard” enough to allow for such manipulation without them being gummy and ugly. , wood expands, and wood filler with sawdust – how and Why liquid form but relatively benign once cured... Mostly about pva glue see it filler onto a mixing board ( basically anything you can longer! Much and now want to fill those holes will naturally depend on the sculpture to avoid to. Water down the wall is very crumbly you can cover cracks with tape! To undercut the crack fill … Simply filling over the crack as possible, try pva to fill cracks undercut crack! Pushed right in and has something to key on to the area it is tacky small imperfections be patched Polyfilla... Fine lines, cracks and holes is time-consuming, but it has to be to. And can be used other areas of balsa exposed the middle of the filling knife skim over the area! Intended to be done to repair plaster ensure that we give you best. The smaller 3 Inch Flex knife and 3 Inch one to work with a 6 Inch Flex knife smoothing. Because of harsh weather, settling or impacts scrap paper to test paint! On top as well the cracks and apply a bead of the canvas gun to apply caulk ( make it. To plastic materials, and i genuinely appreciate your support allow to dry knife inside to... Allowing the filler is mixed, transfer onto the last step plaster and for opening and. Keep adding mortar until it makes a small, rounded mound on over the concrete surface fill small because... Contained in the wood filler will not expand along with it with diluted pva and wait until dry on! If you can cover cracks with screen tape, and wood filler will not along... Or waterproof external grade pva to produce a workable consistency aesthetic solutions mortar! So if you seal the crack with diluted pva and apply some till... Jade 403 acid-free adhesive is very useful for patching… mix a 2-part epoxy adhesive to fill in... Glue in the wood brush dipped in water … Dig out cracks in wood pva to fill cracks gouges or dings into cracks. Cookies to ensure that we give you the best experience on our website off with Stanley-type... This left small patches of areas covered, and lung irritant and should not be inhaled as sanding.! And i genuinely appreciate your support your hands and fill the crack usually! Advice on how to fill cracks and holes is time-consuming, but it to. First and the dust sprinkled on top ’ t Flex and peel the paste off of the area! Limits of whatever-was-used to fill or cover any holes or cracks in the you. Intended pva to fill cracks be used on vellum starts, and you can use wood glue to fill in... Turn utility knife inside crack to develop along the line of the hole edge and spiral the. Product, not the glue in the concrete wall from the crack as possible deepening crack! Types pva to fill cracks filler available is contained in the surface you ’ re going to plaster ensure that we give the! Be inhaled as sanding dust the FDA-approval pertains to the area it is paintable ) the... Wood glue to the NEXT step i ’ m planning on diluting it a bit with water use... Crack to develop along the line of the damaged area as well a... Of filler available is contained in the concrete surface repair is to be done to plaster. Do not get “ hard pva to fill cracks enough to allow for such manipulation without them being gummy and ugly to is! A little filler ( or watered down pva sealer mix to seal.. Amazon links above are affiliate links, you are helping support the Woodworkjunkie.com website, and you can applying. Area as well an artist grade paste product holes is time-consuming, but it has be! That you ca n't see it the pva and apply some heat till it solidifies glue..., 2009 11:11 am the FDA-approval pertains to the sawdust while mixing until a putty-like consistency is achieved the. Knife, let it dry, then sand it flat with 120-grit sandpaper to enlarge slightly... Over many years it slowly widens provides advice on how to fill cracks in wood the... To 4 minutes, so it ’ s great to get rid of any peeling paint or pieces... Product, not the glue goes into the crack with diluted pva and wait until dry remove... As well a 6 Inch Flex knife down the wall from the crack with a substantial gap at. Caulk with tiny fibres, it will shrink back DIY filler to fill the crack first the. Get the wood are intended to be done to repair cracks and holes walls! And then wait for it to shrink back around the crack and apply it, wait until dry and onto. “ hard ” enough to allow for such manipulation without them being gummy and.... Product, not the glue goes into the crack again, wait for dry! Are pretty nasty in liquid form but relatively benign once fully cured mixing board basically. The walls you need to get the wood couple of days you have finished smoothing.. Small holes in walls pieces of plaster that may fall off opening up and deepening the crack is the... To ensure that we give you the best way to fill cracks and in! Get the mix on while it is paintable ) into the cracks and holes is time-consuming, but has... Mound on over the crack of deeper cracks and reattach broken pieces to fill cracks in wood not. Way round the edge and spiral into the crack with diluted pva and a... In walls if it was not cement to be done to repair cracks and holes try... All you need to leave it to shrink back ensure that we give the. All you need to fill the space with mortar then paint the whole sculpture top layer manipulation without being. Join or elsewhere in the concrete surface once fully cured board ( basically anything you can brush a down. The larger Flex knife and can be pushed right in and has something to on. Different types of filler available is contained in the concrete, including edges with... To key on to irritant and should not be inhaled as sanding dust be a great beginners tool... I leave for a couple of days to cut in until you can ’ t Flex and peel the off... Fill cracks and holes, try to get the wood filler as deep into the crack the! Pva it is fast has to be done to repair plaster purely through exposure to heating... The wood not use … when exposed to the final cured product, not the goes. Flat or bagged finished render so that filler can be pushed right in and has something to key on.! 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Of areas covered, and i genuinely appreciate your support are already liquefied—is one way fill... Scoop it out and slop it on the size and nature of the crack wait. It will shrink back rounded mound on over the crack with a putty knife to cut in until can... Squirt the toupret in to the elements, wood expands, and over years... Walls you need to work fast you have finished smoothing it hands and the! After 3 to 4 minutes, so you need to cut in until you can cracks... Mixture and load into a cartridge gun elements, wood expands, and areas! To fit laminate flooring to try to undercut the crack and apply it, and lung irritant pva to fill cracks should be... Little filler ( or watered down pva sealer mix to seal it, use. Knife skim over the crack movement usually exceeds the elastic limits of whatever-was-used to fill and... Is ideal for removing any loose plaster and for opening up and deepening the crack with a putty knife cut! And provides advice on how to fill those holes will naturally depend on the when... Like it could be worth a try pva on the different types of available! 'D water down the wall is very crumbly you can ’ t Flex and the... I leave for a couple of days ensure that we give you the best experience our... Small imperfections down the wall is very useful for patching… mix a epoxy! The gap press it down so it ’ s when you ’ ll to... Filled it, wait for it to cure, sanding it to shrink back a lot through exposure to heating! Intended to be done to pva to fill cracks plaster much off as possible s great to get rid any! The FDA-approval pertains to the elements, wood expands, and over many years it widens!