Thank you for your feedback. The QEP Universal Grout Float is designed with a non-stick gum rubber that provides a surface for smooth application for all types of grout including epoxy. It has an extra thick aluminum backing plate to ensure maximum leverage and applying grout into joints. It has two rounded corners to prevent gouging of grout joints and two square corners to ensure complete grout coverage in hard-to-reach corners. Not only does it have these great features, it also has a comfortable, contoured and cushion grip handle. Customer Care