Fibreglass Evercoat 633 Fiber Tech Reinforced Repair Compound - 24 oz. Tube A special blend of fibers that provide smooth and easy application similar to that of short strand filler, with the structural strength of long strand filler Extra strong resin and fiber combination is ideal for double-sided repairs, eliminating the need for most fiberglass resin and mat applications Contains ZNX-7 for superior adhesion and corrosion resistance, providing strong, waterproof repairs over weld areas, panel bonds and rust damage Specially formulated to hold down bond lines, seams and repair mapping on SMC, fiberglass and other thermal sensitive substrates FIBER TECH is perfect for filling gaps, cracks, holes and seams