Short Strand Reinforced 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.
It is reinforced with short fiberglass strands which make it more flexible, and much stronger than conventional body fillers.
The added strands make this filler somewhat more difficult to work with, however.
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
• Repairs dents and other surface incongruities in metal, fiberglass, and wood
• Waterproof when properly primed or topcoated