This repair kit is ideal for minor surface repairs of Gel-coat, fiberglass, acrylic and porcelain fixtures in kitchens, bathrooms, boats, as well as surf boards and laminate countertops. The kit includes Gel-Coat putty, hardener, applicator stick, #400 grit sandpaper, #600 grit sandpaper, polishing compound and alcohol wipe. Working time is about 15-20 minutes. When mixed correctly the surface hardens in 1-3 hours. This kit will cover approximately 18 square inches (1.5 sq. ft.).