Grout, grout and grout

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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 🙂
 
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
 
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.
 

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Grout, grout and grout
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Tile Adhesive and Grout Advice
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Simon Dale,
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