This clear UV-curable polyester resin will cure either by exposure to sunlight in roughly 3 minutes or by adding MEKP catalyst the old-fashioned way hardening in 30 minutes.Either way you'll have a high-strength permanent repair with Solarez.This is a litre bottle as a rough guide two litres is enough resin to glass a 6'3" board completely. :: Unisex > Surf Accessories" Size: one size.