OSI HM-270 is a high modulus, one-part RTV silicone construction sealant designed for sealing. It cures at room temperature upon exposure to moisture in the air providing good tensile strength and excellent adhesion to most non-porous building materials
HM-270 easily withstands temperature extremes and is highly resistant to UV light. HM-270 offers superior elasticity, long-life reliability and is unaffected by other harsh environmental elements
HM-270 Silicone Construction Sealant is primarily used for structural or conventional type glazing and curtainwall sealing involving glass, plastic or metal. Excellent for Non-porous material. Waterproof & Weatherproof
For general usage, HM-270 has many applications including sealing skylights, solar panels, ventilators, aluminum siding and windows, heating/air conditioning units, duct work, recreational vehicles, and other glass, plastic or metal assemblies
Coverage: For a 10 fl oz (295 mL) cartridge: A 1/4" (6 mm) bead extrudes approximately 30.6 ft (9.3 m). A 3/8" (9.5 mm) bead extrudes approximately 13.6 ft (4.1 m)
