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OSI H2U Window, Door, & Siding Sealant - White

- Available in 2 Options. Pricing may vary.

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Product Information


The OSI H2U Window, Door, & Siding Sealant is an interior and exterior, high performance sealant designed to seal siding, door, window, and trim. It has a superior acrylic urethane formula with better adhesion, flexibility, and durability than most sealants. This sealant is manufactured to seal around exterior window and door frames, sill plates, electrical and plumbing penetrations and other areas where water and air can infiltrate. H2U from OSI will dry to a glossy sheen and will also work well along baseboards, floors, and wall to floor joints.


  • Clear Color Option Available Here
  • Designed for sealing the interior and exterior of windows and door frames
  • Keeps flexibility once applies and cured
  • Paintable and water resistant
  • Low VOC content


  • Capacity: 10 oz. tubes
  • A 1/4in. (6 mm) bead extrudes approximately 31 ft. (9.5 m)
  • A 3/8in. (9.5 mm) bead extrudes approximately 14 ft. (4.2 m)

Helpful Documents

WARNING: California's Proposition 65
Proposition 65 Warning for California Consumers

Prop 65 Warning WARNING: Cancer and Reproductive Harm