3M Bondo Short Strand Fiberglass Reinforced Filler 1.37 LB (621 g) with Bondo Cr
3M Bondo Short Strand Fiberglass Reinforced Filler 1.37 LB (621 g) with Bondo Cream Hardener 0.5 oz (14g), Repair Holes Up To 0.5 IN, Waterproof (SS-PT-ES). Fiberglass strands and fibers make it twice as strong as regular body filler.