gypsum and cement based adhesives - TilersForums.com

[devonmark]

We all know that you should prime a plastered wall when using cement based adhesive to stop reaction...well as I was plastering a wall yesterday it got me thinking (yes painful, especially as I had a hangover), I had done an internal render of sand and cement and was going over it with multifinish..a gypsum based finishing plaster, what I was thinking is....why do I not get a reaction as it's gypsum over cement :huh2:

All the best to you all for the coming year..Mark.

 

[grumpygrouter]

Good question, not being a plasterer, I have no idea!

Grumpy

 

[DHTiling]

Good question mark...
I would have thought this would be best answered by a plasterer and not tilers....
So come on all you plasterers what do you think on this one.....

 

[devonmark]

I am a plasterer and do not know the answer....lol

Never even give it a thought til yesterday.

 

[Perry]

Mark i have been pointing that out for 25 years haven't found an answer yet and for twenty years i never primed plaster when using cement based adhesive without one failure if you find the answer let me know mate
Regards Pete :yes: :lol:

 

[grumpygrouter]

Maybe the best people to interrogate would be the adhesive manufacturers!

Grumpy

 

[Perry]

Grumpy tried that i think you will get the same answer don't get me wrong you can get a reaction between the two but its something they have always done but i think may be the plaster manufacturers would be the ones to answer the question

 

[devonmark]

I think I may fire off an e-mail to B.G and see what they come back with...

 

[DHTiling]

I think that once the cement has cured then there wouldn't be a reaction once gypsum is applied....let us know mark....i have crawled the net but can't find a deffo answer....

 

[Perry]

good one Mark i try not to think when i have a hangover :lol: