Dynatron Dyna-Glass Short Strand, 464, 128 fl. oz. (3.78 L) Dynatron Dyna-Glass Short Strand reinforced body filler creates waterproof repairs that are twice the strength of ordinary body fillersThe filler is designed to be used as a reinforcement material where a stronger filler is needed when repairing or filling larger gaps in auto body, marine, industrial and architectural surfaces. Product Information Brand 3M Part # 7000125049 Line Dynatron Application Small Dent Repair Origin Country USA Product Type Fillers Product InformationEasy to spread formula goes on easilyFiberglass reinforced filler creates strong and durable repairsFiller creates waterproof repairsGreat for repairing fiberglass and rust holes in metalSignificantly stronger than regular fillersSuggested ApplicationGreat for repairing fibreglass and rust holes in metal