[spence]

After pulling up some vinyl flooring there still is a thin layer of adhesive bound tightly to a concrete slab.

Can I go over this with RedGard to seal and then regular thin set before I lay ceramic tile on the floor? This is a small area (25 sq/ft) and everything else is new concrete board.

Otherwise it would have to be ground off. Scraping with a Big Mutt won't even take it off...

thanks,

-spence