Interlux Watertite 2-Part Epoxy Marine Filler Compound Interlux Watertite is a quick drying 2-part epoxy filler suitable for use on Fiberglass, Metals, Epoxy and rigid Wood constructions. The formulation does not shrink and is extremely water resistant, making it suitable for osmosis damage repairs. It has a long easy-to-sand window and can be applied to a thickness of 34 without sagging. Its superior spreadability makes it an ideal glazing compound for filling small nicks and scratches. Feature