Help!: sealocrete pva????

[plumbline]

can some one please have a look and read sealocretes pva spec sheet to be used as a primer for tiling. it says that it is suitable for priming prior to tiling yet i seem to have a failure other tilers i have spoke too say avoid it and others swear by it and have never had a problem!!! ive specifically bought this pva but it hasnt done what it says on the tin!! i think its very misleading and as it says compatible with gypsum and cement you would assume it does the job. im wondering how many other people would buy this pva after looking at the spec sheet??

[Del W]

Hello,cant find a proper spec sheet. can you do a link ?

[plumbline]

sorry not too hot on the computer!! they dont seem to have a proper spec sheet sheet it just looks more like an instruction sheet. its on their website under sealobond pva then technical pdf download?? cheers

[Stewart]

At the end of the day, it's still pva, which is widely recognised as unsuitable for tiling as it reactivates when exposed to moisture. Most tilers used to use pva including myself, many years ago, but products and knowledge have changed, yet some manufactures of addy still recommend it. In future I would always recommend a suitable primer or sbr that the same brand as your addy to minimise failure and make it easier to find the problem if you have one.

[jay]

this one http://www.google.com.au/url?sa=t&so..._i0ZpmDlacraPw



best read this P.V.A. Versus Primers

[plumbline]

yes jay that is the one thanks for puttin that link in cheers

[jay]

read the other link to as the pdf is very brief

[plumbline]

stewart i agree but in a moment of madness i have used this after reading the bottle and knowing other tilers that use it even on cement based adhesives!! and it does say suitable for gypsum and cement cheers

[jay]

true but the problem with PVA is if moisture gets to it and it will it returns to a liquid causing tiles to debond

[Stewart]

If you read the other link that Jay put up, you'll get much more information. Also of you contact your addy supplier, they will probably have nothing to do with it as you haven't used matching products (unless you used sealocrete addy)

[plumbline]

yeah i know stewart i spoke to my addy supplier he had a look at sealocrete and according to what their spec sheet/instructions say it shouldnt of failed i realised i cocked up by using it although i have used it since on other jobs with no problems. i was only wondering how many people would interpret that spec sheet as a suitable primer even though it is pva. i spoke to other tilers and some buy it specifically and use it on gypsum with cement based adhesive

[grumpygrouter]

Anything that says it's a "pva primer" has no place in tiling as far as I am concerned!! If i was you I would bin it and never use it again. You have had one failure, are you going to risk anymore?

[plumbline]

ohhhh dont worry it has gone straight in the skip now but i feel rather naffed off at how misleading their poor spec sheet is and after reading it i dont think i will be the last to fall for it!!! the bit where it says compatable with gypsum and cement actually winds me and it does say ont the bottle suitable to be used as a primer prior to tiling and the worrying part is i went to the shop i got iit from and they reccomended it again and they couldnt understand how it had failed after reading the bottle!!!

[grumpygrouter]

This link might help to explain the failure....

P.V.A. Versus Primers