Beige Fast Setting Auto Body Seam Sealer for Autobody, 11 oz. Cartridge. SMR-26B, Black Fast Setting Seam Sealer is the fastest curing of seam sealers. Firm Set allows ample time for tooling and can still be painted 30-60 minutes after applied. Firm Set smooths easily and all rough edges or fingerprints disappear without the use of solvent. Super durable and flexible properties eliminate all cracking problems. Minimal shrinkage.