does anyone knwo the difference in these 2 siliocnes

silcoferm is the normal pci silicone and it says on the back of tube if sealing stone that carraferm silicone must be used

called the stockist who said they havent been asked for this product in years

maybe pj or alan p might know as they are pci users

Carraferm is acid free silicone, suitable for stone, to avoid staining and "picture framing"
The last carraferm I was sent was 12 months out of date, had to be changed of course, but yeh, quite hard to come by.

nice one thanks tommy,think i will try it on next stone job

btw is mapei silicone acid free?

Jamie have a look at these page 11 stone
Brochures

thanks pj

love the pci gear its the business

have you used the carrafug grout?

no nanofug i have its the best grout i have ever used