A two-part, easy to use, fast drying epoxy compound for filling holes and repairing scratches in gelcoat and fiberglass. Interlux Watertite Filler is especially recommended for use to fill gelcoat blisters below the waterline. It is recommended for use with the Interprotect Epoxy Barrier System or VC Tar2. Interlux Watertite YAV135 is an excellent fairing compound due to its unique two-phase cure, which gives a long easy-to-sand window. Interlux Watertite Filler can be applied to a thickness of 3/4″ without sagging and its superior spread ability makes it an ideal glazing compound for filling small nicks and scratches. Mixes at a 1:1 ratio. Interlux Watertite Technical Datasheet