Blackwoods has a great range of gasket sealants including masking tapes, painters tapes, Denso petrolatum tapes, joint compounds, thread sealing tapes, Stag jointing tapes, Loctite 515 flange sealant and more. Our range includes products that seal metal flanges against leakage and movement, resist petrol, oil, grease and ethylene glycol. Buy online gasket sealers at Blackwoods from leading brands Loctite, Denso, Ebony, Stag, Tesa and Unasco.