OSI HM270 Silicone Sealant

Additional information

OSI HM270 Construction Silicone Sealant is a medium modulus, one-part RTV silicone sealant designed for glazing and sealing. It cures at room temperature upon exposure to moisture in the air providing good tensile strength and excellent adhesion, usually without the use of a primer, to most nonporous building materials. OSI HM270 easily withstands temperature extremes from -76°F to 350°F without adverse effects. It is highly resistant to ultraviolet light and is virtually unaffected by other harsh environmental elements. OSI HM270 offers superior elasticity and long-life reliability. It forms a permanent watertight and weatherproof bond to materials like glass, ceramics, aluminum, primed steel and some plastics.

Temperature extremes are no match for HM270 -- an acetoxy silicone that withstands harsh conditions from -76°F to 350°F without missing a beat. Designed for use on non-porous materials, its application possibilities include a variety of tough challenges: ceiling skylights, solar panels, duct work, aluminum siding, recreational vehicles and more. With 25% joint movement, it’s also permanently flexible.

• Water resistant
• Weatherproof
• Flexible
• Easy Extrusion in any weather
• Available in black, white and clear
• HM270 should not be painted.

Safety Data Sheet

Safety Data Sheet, Clear

Product Data Sheet