Grout, grout and grout - TilersForums.com

[Simon Dale]

Don't swear on here Simon !

I try not to. They gave it to me large yesterday thought id throw the cat amongst the pigeons

 

[Simon Dale]

Polymer modified cement based grouts are more flexible than epoxy. Or at least they are in Mapei's case.

Kerapoxy vs Ultracolour Plus as an example:

Flexural Strength (N/mm2): KP = 31, UCP = 9
Compressive Strength (N/mm2): KP = 55, UCP = 35

Hi Paul. Posted this on the TT forum hope you dont mind ? No name mentioned just the facts

 

[Tile Shop]

Thats fine. That was probably enough for people to switch off

 

[hmtiling]

I'm not convinced that flexural strength will define flexibility

 

[Tile Shop]

It doesn't exactly. But a grout that can resist that much flexural pressure ain't gonna be that flexible is it. Its rigid, its higher density and solid as ****. Grout needs to have a lower denisity and capillaries in it to allow flex and limited movement. Epoxy doesn't have that.

Like i said, there isn't a test for actual flexibility defined by any standards, but the flexural strength is a good indicater.

Don't have to take my word for it. Ask Bal, ask Mapei, ask Ardex..... Or do your own test.

Rule of thumb i was taught and have stuck to for 20 years:
CG1 - not flexible
CG2 - flexible
Epoxy - flexible but nowhere near as flexible as CG2

 

[Tile Shop]

Fine, prove me wrong.

 

[hmtiling]

Fine, prove me wrong.

You haven't proved anything Paul. If you're right I'll hold my hand up though.

 

[Tile Shop]

No i haven't proved it. Its just simple logic.

 

[hmtiling]

No i haven't proved it. Its just simple logic.

How much epoxy have you used and picked off tools days later? It's not as rigid as you suggest Paul. Yes simple logic

 

[Tile Shop]

None. I've cleaned the float after use. honest

More like i've left it and forgot about it for a few weeks and "borrowed" a new one from stock.