Mapei primer G required?

[Stan7]

Good to know, Rich. Is there any disadvantage to using a primer?

 

[Rich Midge]

Only if you over apply. In the short term you may find it takes a little longer to dry but when it does dry the bond will be stronger. I'm presuming you're fixing ceramics? What size are the tiles?

 

[Stan7]

Good to know. Yes, ceramic tiles that I think are 200mm x 200mm

 

[Rich Midge]

Then you should be all good to go. Leave it as long as you can before grouting and don't exceed the bed thickness. As @whitebeam said tubbed adhesives require air to dry so it's imperative you leave it as long as you can. Best of luck with it.

 

[Stan7]

Appreciate your help, Rich. It's been a good 15 years since I last did any tiling but wanted to help out my mother in law as she has been through a tough time lately.