Semco teak sealer, classic brown, gallon. Long lasting protection. Lasts through the season and can be renewed without deep cleaning or stripping for years! SEMCO Teak Sealer is a solvent-based sealer that contains pigments, UV inhibitors and moisture protection. SEMCO Teak Sealer is manufactured in several shades. Once applied, your teak will not turn grey or allow the growth of mildew. Surface soil can be washed away with mild detergent, and with seasonal recoating the teak will be preserved in its original state for many years.