3M™ EC-3550 B/A FST Scotch-Weld™ Structural Void Filling Compound 400ml Automotive Masking Allow first application of primer

Allow first application of primer to dry before applying the second coat

aggressive tack for a quick assembly of high-stress bonds

It features high ultimate bond strength with excellent high temperature performance and excellent solvent resistance

Removable without leaving residues

3M™ EC-3550 B/A FST Scotch-Weld™ Structural Void Filling Compound 400ml Automotive Masking Allow first application of primer3M Scotch Weld Structural Void Filling Compound EC 3550 B A FST is a two part, low density, flame retardant epoxy compound that can be stored, applied and cured at room temperature. Scotch Weld EC 3550 B A FST a non sag, non brittle compounds designed for void filling, edge sealing close out, corner reinforcement, local reinforcement for mechanical fixation and complex gap filling in honeycomb sandwich structures. The cured materials meet 14 CFR 25.