After a couple of applications go over the bricks with neat PVA and then start building the gap up with bonding coat. As Joe suggests, giving the wall a really good hosing down 2 or 3 times will help. I have some concrete sills with mortar joints that I want to water proof. If it's more than maybe 3/16th" then I'd suggest probably bonding it first, skim doesn't really like anything more than 3-5mm depth to get a nice finish. Sign up for a new account in our community. I'm preparing to paint the walls in my dining room, but there have been patches of plaster that have come off the walls when touched. As a General … feedback, With regards to lime plastering you never pva. What does SBR primer mean? PVA is an absolute no no under any circumstances. 100% positive 34 Our high quality PVA bonding agent can be used as an adhesive on most porous surfaces, and also offers both priming and sealant against dust. Moderator: Moderators. ]..grass not growing generally speaking at the bottom of the... © 2008-2020 MyBuilder Limited I am sure its something most builder people know but us newbies do not. (I presume by SBR you're refering to BAL SBR?) It was cheaper using SBR than buying exterior PVA. SBR I can vouch for personally in screed. jobs, anything else will stop the wall breathing and create dampness having the opposite effect of what you want to achieve Everbuild 503 Premium SBR Bond Bonding Agent 5L is rated 4.9 out of 5 by 27. The ratio of dilution is 1 part Bostik SBR to 4 parts water. STEVE 65 - 5 years ago. Does the same job. Unlike PVA bonding agents, the bond strength of SVR is latex unaffected, even if the background becomes wet (i.e., the polymer is non re-emulsifiable once cured). Styrene-butadiene copolymer resin (SBR) has the best adhesion of all the polymers mentioned, the best resistance to water, and the best abrasion resistance. 100% positive Order online at Screwfix.com. Discuss Everbuild SBR Bond as primer in the Tile Adhesive area at ... (Do not be tempted to use cheaper PVA which moisture breaks down) SBR Bond is a latex ... of cement mixtures by forming a reinforcing polymer that increases long term durability and flexibility of the mix on renderings and floor screeds adhesive etc. It's pretty much the same job but done outside or … Some of the patches are quite large and has made the wall uneven, although the parts that have come off aren't that thick. Or just saturate with water before rendering with the lime. I've certainly glued T&G chipboard flooring together with it. I actually have some sbr pva bond, as i walked in the local builders merchant as was meant to grab normal pva but grabbed pva bond. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. 05272398. Cementone SBR can be used to prime or act as suction control when diluted down. cheers, Mareham Le Fen • Member since 1 Mar 2009 • PVA which is marketed as "water resistant" or "exterior grade", has additives which makes them water resistant, but they're not alkali-resistant. Thanks for all the advice. It is generally agreed in DIY forums that SBR (styrene-butadiene rubber) is a far superior alternative to PVA when used as a bonding/ sealing agent for cement renders although it is more expensive than PVA. Do you use PVA when rendering? ... SBR, or Styrene Butadiene Rubber, is a water resistant bonding and sealing agent, and shares many similar characteristics with PVA. Bostik PVA can be used as an admixture to improve workability and adhesion of cement/sand mortars, renders, gypsum plasters, or … Mixing Render – Render actually only contains three ingredients, and they are lime (stone, not the fruit! 100% positive 506 Contractors PVA. Id glued up some old walls the night before and skimmed them the next day. For example, lightweight concrete block that’s 3.6kN so we don’t want a really strong mix for this because if the wall moves, which it will as you always get some expansion and contraction as the seasons change. (I presume by SBR you're refering to BAL SBR?) 9 Consequently, SBR is more suitable for situations where damp might be a factor, such as external finishes, shower areas and swimming pools, as well as in sand or cement screeds and renders. Brick/mortar, then yes, a 5:1 PVA first, give it a good scrub with a wire brush first if in doubt, then a good brush out to get rid of any loose dust/debris, yes to bonding with tacky pva then finish with skim (no need for pva when skimming onto bonding). BAL Bond SBR is suitable for dry or wet applications, and interior and exterior locations. concrete, lightweight blockwork, brick etc. Spread the render up, towards the top of the wall, and try to spread it in one solid motion. Search. Rendering Exterior Walls – How to Render an Outside Wall Including Getting the Right Mix and Correctly Applying and Finishing the Render. Construction Chemicals SBR is a white styrene butadiene emulsion used to improve the properties of cement renders, screeds and mortars. Did you use a cement mixer or did you hand batch. Not heard of that before. This gives an excellent bond to old concrete, provided you apply the initial coat of SBR/water. Showing all 5 results. Product code / name. Watched one where they just sprayed the area with water before filling holes with plaster. And I have been watching youtube clips to see what people do. I've not tried the SBR method,, but to blame the failure of the scratch-coat on your interpretation of a measured amount of waterproofer i find hard to believe. The best mix for rendering depends on what you’re rendering on to and the golden rule is you never make the mix stronger than the material that you’re going on to. The bonding properties of SBR liquids are well known to be strong and waterproof. Log in (0) 0330 053 6145 Calls charged at local rate. job, jobs, Can I not and just insulate rest of house. However, if you were tiling on plasterboard and wanted a primer you would use APD or BAL's standard primer. Here at Everbuild we produce several PVA and SBR bonding agents within our state-of-the-art factory in Leeds, including industry favourites such as 501 PVA Bond and 503 SBR Bond. PVA & SBR Bonding Agents Here at Everbuild we produce several PVA and SBR bonding agents within our state-of-the-art factory in Leeds, including industry favourites such as 501 PVA Bond and 503 SBR … *If* the screed gets damp, SBR will not fail and it's tougher than PVA IME, and penetrates better (it is very fluid). or Neat? Old thread. 503 SBR Bond. ... SBR - BAL Bond SBR, Palace Tilers Primer, Norcros Prime Bond . SikaBond Waterproof PVA is a waterproof vinyl acetate polymer especially formulated for exterior use as an adhesive and sealer, suitable for brickwork, mortar, render, screed and plaster. PVA is an absolute no no under any circumstances. And on the leaflet that OnOff suggests, they say use GypPrime and Bond-It for high suction areas - but I can use  PVA as an altenative? N.H.L. New rendering should not be applied directly to ‘dry’ surfaces which have not been coated with PVA or Gripbond type liquids which stop the render drying out too quickly and helps adhesion. Prime bonding with PVA dilute 4 to one, allow to go tackey, then skim. The uses of PVA may be many, but they do not include anything tiling related. Scroll down for a longer answer! Use proper manufacturer approved primers and additives instead. Browning is pretty good for bulking out actually, so I'd second that. good luck Alex, Hull • Member since 17 Jun 2016 • Used 1 to 5 mix, cement and sand with SBR mixed in, didn’t use plasticiser. feedback. As for SBR, depends what your substrate is. The Cementone SBR is a product that can be used as an admixture for suitable cement based mixes such as for rendering and sand cement screeds mixes where it will waterproof and strengthen the resulting cured material. A lot of people will do all the heavy work and clean up and then mop all the floors / floorboards with a weak pva solution to 'size' all the surfaces and lock the dust down. 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