Homelux HPXW5US 54-Square Feet Waterproof Wall Underlayment For use in showers and wet areas to provide a watertight tile installation Underlayment is quick and easy to apply with no waiting time so you can install tile immediately Can be used with underfloor heating 54 sq. ft. roll measures approximately 3.25' (1M) wide and 16.5' (5M) in length Limited lifetime guarantee when fitted in accordance with Homelux instructions and accessories For use in showers and wet areas to provide a watertight tile installation Underlayment is quick and easy to apply with no waiting time so you can install tile immediately Can be used with underfloor heating 54 sq. ft. roll measures approximately 3.25' (1M) wide and 16.5' (5M) in length Limited lifetime guarantee when fitted in accordance with Home lux instructions and accessories