Long-strand reinforcing fibers doubles the strength of standard fibers. Extra strength reinforced filler is formulated with long chopped strands of fiberglass for maximum build and gap filling. Ideally suited for rust repair and patching holes in fiberglass, metal, wood, plaster, concrete and masonry. Rust and waterproof.

Product Features:

• Premium strength & durability
• With long-strand reinforcing fibers
• For repairing rust & holes in aluminum, galvanized steel, steel, SMC, concrete, wood & masonry.