Is this going to cause problems when I then paint over the crack? For example, when plastering over an existing artex ceiling the moisture in the plaster would be soaked up so quickly that the plaster would be rock hard in minutes and getting a smooth finish would be impossible. Best Answer. If you use a Sherwin-Williams paint, then you should use a Sherwin-Williams PVA primer. Filled in cracks. I use an old 10 litre paint can lid. by 54aardvark » Sun May 02, 2010 10:58 am, Post ↳   Welcome to the Ultimate Handyman DIY Forum. This info does not constitute financial advice, always do your own research on top to ensure it's right for your specific circumstances and remember we focus on rates not service. Do note, while we always aim to give you accurate product info at the point of publication, unfortunately price and terms of products and deals can always be changed by the provider afterwards, so double check first. Top. Some companies PVA’s are weak, thin and very poor in quality so get a decent one. Which currently I'm not and I don't. PVA is normally used as a bonding aid, applied to the surface before rendering or plastering to help the new material bond. Should I paint all the walls with emulsion before papering or just size them and paper directly onto the plaster? Some small ones about 5mm others quite big … (lacquer or enamel, rather than acrylic). How do you apply PVA glue before plastering? The PVA will be dissolved away, so it doesn’t matter if it bonds to the part while printing. FORUM RULES, Post sorry if i asked too many questions in too many places but there is a lot of advice and many different opinions and each answer always differs slightly from the next. Editor, Marcus Herbert. SAFETY FIRST | 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 would rather want something I dont have, that have something I dont want. Fill each crack slightly proud of the surface. Stain covering primers (Zisser makes one in a spray can) have a heavier body and can be used for the edges as well as flat and detailed surfaces. So don’t use the best dinner plate!) Manufacturers use ingredients in both the primer and paint that will give you better coverage when used together. Follow this link. I really want to avoid doing lining paper! Do you need to use PVA before plastering? This same technique can be used for your PVA rafts. Sealing MDF with PVA Glue: To seal the edges ... Primers used for MDF should be solvent rather than water-based. Fine Home Building recommends that you use the same brand PVA primer and finish paint. by jactac » Fri Apr 30, 2010 8:57 am, Post by Puma » Fri Apr 30, 2010 7:01 pm, Post You aren't doing anything wrong. WHAT AM I DOING WRONG ? I dot and dabbed some insulation board onto the external walls in my study-to-be, and ended up with some gaps (both between the ceiling and wall boards and the wall boards themselves). Filler will suck the moisture out of many paints and will leave a dry matt on top of it without sticking, you just need thinned paint (emulsion is fine), though thinned undercoat would be vg, so the paint penetrates the filler a little and therefore glues down properly. For miniatures/ dollhouses or projects with fine cut details (1/4 scale siding etc. applying pva . Do a good job use what the addy manufacturers say and move on. by jactac » Thu Apr 29, 2010 6:24 pm, Post Polyfilla is rubbish for filling cracks. Alternatively, you can use PVA glue, or better (and cheaper), PVA glue watered down. In fact, it's even an ingredient in acrylic latex paint. It depends on the size of the gaps and how you are looking to finish the table. When the big PVA bags break down it’s going to be more than a mouthful, which defeats the object of everything I’m trying to achieve. 13254. How to seal plaster PVA or paint? Normally you'd water down the pva and apply it, wait for to dry then plaster/fill. The additive in mortar (if any) would usually be a plasticiser to help it flow into gaps and make it easier to work. Alternatively an extra coat can be applied and both allowed to go dry in advance of the re plastering of the wall. Could I use pva glue to fill in a lot of gaps on my wooden dining table . “I always, always use the mini PVA bags. But I could. I have filled and sanded my walls in numerouse parts, can i use pva to seal/prime the filler before painting. PVA is the component of white carpenter's glue that make the glue sticky, and it's the adhesive ingredient in drywall primer. Just a note you will not get as much help from people if you start multiple threads. I used Toupret Murex Exterior Filler (got it from Toolstation - £12.27 per pack). to-use-pva-in-paint-or-not-that-is-the- ... 18116.html. A-Z CONTENTS | Just dab some oilbased undercoat (thinned) on the filler. Sand with a sanding block Once the filler has dried hard, sand the whole wall area with 80 grade abrasive paper on a sanding block attached to a vacuum extractor. Samantha Taylor May 23, 2019 at 3:00 pm. It is ideal for our staircase where the filler will get sanded and painted over. Regarding the painting, I stripped all the old paint off using a heat gun and then repainted the Sandstone with masonry paint however I then got problems with brown stains showing through the paint after a week or so. i have heard yes its ok and NO NO NO NEVER !!! 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