OSI

OSI® was born on the jobsite by a group of tradesmen seeking better performance from everyday products. The result is a portfolio of tough sealants, adhesives, foams, and tapes that stand up to the elements and provide lasting protection. More than just products, OSI® empowers professionals with knowledge and technical expertise, delivering real-world solutions that ensure better installs. Trusted by major brands like Therma-Tru, James Hardie, and Jeld-Wen, OSI® continues to drive innovation and support the next generation of building professionals.

6 products

    6 products
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    OSI® SC175 Acoustical Sound Sealant – Latex-Based, Draft & Soundproofing Caulk
    OSI® SC175 Acoustical Sound Sealant – Latex-Based, Draft & Soundproofing Caulk
    Save $2.11
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    OSI® QUAD® White Exterior Sealant for Windows & Siding
    OSI® QUAD® White Exterior Sealant for Windows & Siding
    OSI® QUAD® White Exterior Sealant for Windows & Siding
    Save $1.47
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    OSI® QUAD® Window & Door Low Expansion Foam Sealant
    OSI® QUAD® Window & Door Low Expansion Foam Sealant
    OSI® QUAD® Window & Door Low Expansion Foam Sealant
    Save $2.87
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    OSI® QUAD® Butyl Flash – Self-Adhering Flashing Tape
    OSI® QUAD® Butyl Flash – Self-Adhering Flashing Tape
    OSI® QUAD® Butyl Flash – Self-Adhering Flashing Tape
    Save $6.92
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    OSI® HM270 Construction Silicone Sealant
    OSI® HM270 Construction Silicone Sealant
    OSI® HM270 Construction Silicone Sealant
    Save $1.97
    Sale
    OSI® F38 Professional Drywall & Panel Adhesive
    OSI® F38 Professional Drywall & Panel Adhesive
    Save $1.71

    Frequently Asked Questions

    What types of products does OSI® offer?
    OSI® provides high-performance adhesives, sealants, construction foams, and tapes built for demanding jobsite conditions. Their products are designed for strength, flexibility, and long-term durability in both interior and exterior applications.
    Where are OSI® products commonly used?
    OSI® products are trusted across residential and commercial construction, especially in window and door installations. They are also recommended by leading manufacturers like Therma-Tru, James Hardie, and Jeld-Wen.
    What makes OSI® adhesives and sealants stand out?
    OSI® products are engineered for superior weather resistance, adhesion to multiple substrates, and long-term flexibility—ideal for use with siding, windows, and trim. For tile installations, consider using specialized adhesives when applicable.
    Are OSI® sealants paintable?
    Many OSI® sealants are paintable once cured. Always check the product label or datasheet to confirm paint compatibility and recommended wait times.
    Do OSI® products meet code requirements?
    Yes, OSI® products meet or exceed key industry standards and building codes, especially for air and water sealing. Their performance is backed by field testing and manufacturer endorsements.
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