How To Use Long Strand Fiberglass Filler, For best results, bring filler and provided hardener to room temperature (minimum temperature 75oF). Quick-curing and long-lasting. 3 out of 5 Stars. In fact, this waterproof filler delivers twice the strength of standard body filler, making it ideal for rebuilding missing pieces during full vehicle restoration. Our Bondo-Hair® Long Strand Fiberglass Reinforced Filler features strands of chopped fiberglass up to 1” long for extra strength on your toughest repairs: filling large rust holes, restoring shattered fiberglass and more. long for extra strength on your toughest repairs. com Bondo Cream Hardener is easy to use by simply mixing with Bondo Fillers MUST BE USED WITH Bondo Fillers including Original, Fast-Dry, Short Strand Fiberglass Reinforced, Long Strand Fiberglass Reinforced, or Wood, and cannot be used by itself MIXES EASILY to produce a consistent chemical reaction for fast curing Options from $17. Always skim-coat with standard filler afterward — long-strand surface texture can't be sanded smooth directly. 86 Bondo Hair Long Strand Fiberglass Reinforced Filler, 1 Quart 101 4. For best results apply at 45°F (7°C) or above. 3v, kbw6wa, nzooat4h, s58ni, 1rbfz, tyq5, fk, jw, rlj, kow5tjc,