We are getting ready to install marble floors. We were told to use Butal Membrane Primer. We can't find any at the stores. Is there something else we can use as a primer for our floors? Also were can we buy it?
butal is a water proofer,used under ceramic tiles,in wet or humid conditions,it may be sold in your area by roofers,look in the phone book under "waterproofing" and roofing supplies