Tavy Thin-Skin 2-Part Underlayment System allows you to set tile over any sound surface. The Tavy Thin-Skin Underlayment is simply trimmed to size and glued to the existing surface, using Tavy #007 Glue, to create a surface suitable for setting tile, marble, granite or other natural stone. One roll of Tavy Thin-Skin and one gallon bucket of Tavy #007 Glue will cover 100 sq. feet. Circle 320 on the Reader Inquiry Card.