Pva Versus Primers | Always Use A Primer When Tiling, And Not Pva

[malcolml]

Re: P.v.a. Versus Primers......

topps adhesive known as toppfix is manufactured by palace chemicals and in the topps training which is done by bal there told they shouldn't reccomend a p v a as a primer BECAUSE IT ISN'T :ninja:

 

[doug boardley]

Re: P.v.a. Versus Primers......

many thanks for posting this thread Dave it gave me the ammo to get site agent to switch to sbr. After years of badgering he remained in the"we've always used pva" mode of thinking but I was able to hit him with all the technical data as to why it was inadequate.Even offered to sit down at his desk and get forum up on his laptop to back myself up!! Oh, and he even agreed to switch to powder addy rather than the green star c**p he'd been wanting to use. Much appreciated mate.
Doug

 

[marcel]

Re: P.v.a. Versus Primers......

thanks for this info dave

 

[user123]

Re: P.v.a. Versus Primers......

Wow. Thanks, Dave.

I just finished a small mosaic on a round breadboard supplied by a customer to be made into a present and primed it with waterproof PVA (Evostick Evobond)), also using same as adhesive - now to be grouted. As yet it seems solid enough with the very small glass pieces, but probably won't risk it anymore...or is the waterproof PVA a different matter to the usual stuff? Hmmm...

Does anyone know if the American Weldbond is any better?

 

[doug boardley]

Re: P.v.a. Versus Primers......

let Dave explain the "ettringite" stuff to you!! but don't plan on going to bed before the wee hours!!!:lol::lol::lol:

 

[cp3147]

Re: P.v.a. Versus Primers......

fantastic thread dave

 

[edwardk]

Re: P.v.a. Versus Primers......

Very interesting.
I've got some EasyBond Limelite left over from plastering granite walls. It's a cementous bonding agent with resins in as far as i can tell.
Would this be suitable for use ontop of concrete or screed substrate ?

The plasterer told me to use it instead of PVA for making sure the plaster adhered to the granite rubble wall (he'll be doing the finish coat but wasn't interested in the dub and scratch coats ).

Just interested to see if I can use up some materials wisely ?!

Thanks
Ed

 

[doug boardley]

Re: P.v.a. Versus Primers......

if it's like thistlebond I don't think it's wise to do so,but can't exactly remember why!

 

[Corky]

Re: P.v.a. Versus Primers......

I have only used thistle bond as a sealer/adhering agent when skimming over well dried bonding as it seems to do away with the air bubbles that form and can show through a finish when pva is used.
Never heard of Easybond so cannnot comment on its pro's & con's,but why not have a chat with your supplier ,maybe your stuff will do or they will advise on an alternative.Surely if the plasterer is responsible for the wall he needs to do and recommend the prep ?.Sorry I cant be of to much help but to so so I would need see the job.
I use these for repairs and plastering on concrete.
broken link removed

 

[keraldine]

Re: P.v.a. Versus Primers......

If you give Bal technical department a call they will talk you through a reccomendation using their products , i think its because some work as a sheet primer and others as a particle primer so wont peel if there is any air or moisture content

 

[J.F Tiling]

Re: P.v.a. Versus Primers......

i was getting really worried then as i recently tiled my friends bathroom,good job i used bal primer wicked link dave thanks mate:yes:

 

[martin bell]

Re: P.v.a. Versus Primers......

hi as regarads to using pva what would you do if the customer has primed the wall with pva how would you fix this before you tile cheers martin

 

[LM Ceramics]

Re: P.v.a. Versus Primers......

the pva must be stripped off i would use a sander then prime with an acrylic primer i would use BAL sbr

 

[martin bell]

Re: P.v.a. Versus Primers......

hi what about primer g would that be okay do you think

 

[LM Ceramics]

Re: P.v.a. Versus Primers......

best to stick with the brand name primers go to your local tile shop and ask them for a suitable tile primer