Wondering if anyone has a recommendation for solvent based (or water based) impregnating neutral (non-color enhancing) stone sealer.  I have been using LIthofin PSI or ASI solvent based pretty much exclusively, but its very expensive and a special order around here.   Also, what do people find are typical coverage rates?  I am currently stripping and sealing pink sandstone floors in a church and the stone is very absorbent.  I am working on a a bid currently and am having a difficult time pricing in the stone sealer.  Am currently working on the assumption of 80 foot coverage (that would be 160 sf for one coat divided by two for two coats) and my cost is about $40 per liter for PSI and $20 per liter for ASI. Thanks.

From the desk of
Baird Standish
Managing Partner
Facility Specialists, LLC
1616 Walnut St.
Philadelphia, PA 19103
Phone: 215-732-7505
Fax: 215-546-9160