Polyester Body Filler for Especially Strong Flexible Repaiirs
This performance body filler can be used alone or in conjunction with fiberglass tape, cloth, or mat, to repair and rebuild rusted-out metal or damaged fiberglass materials.
Long Strand Reinforced Filler is reinforced with long-strand fiberglass to create especially flexible repairs that are even stronger than those made with short strand body fillers, and far stronger than conventional fillers..
There's a trade-off, however, in that those long strands make this filler stringy and more difficult to work with.
We recommend leaving this filler with a slightly concave surface, and overlaying a glazing putty skimcoat which will be easier to shape and sand to a smooth finish for above the waterline cosmetics.
For a smooth sanded surface below the waterline, use 3M Marine Premium Filler which is made with waterproof vinylester resin.
Ideal for larger repairs, and for filling flexing gaps
Longest lasting filler repairs
Repairs dents and other surface incongruities in metal, fiberglass, and wood
Waterproof when properly primed or topcoated