Why OSI

OSI takes the best practices from years of experience in new-home construction and brings that expertise to replacement windows. WINTeQ™ Window Installation System is the cornerstone, a completely compatible line of products that remove the guesswork from replacement window installation.

The First Complete & Compatible Window Installation System

WINTeQ™ Products for Replacement Windows

WINTeQ Products for Replacement Windows

Preparing the job site for replacement windows is much more intensive than new construction. Utilizing the OSI® WINTeQ™ system installation method for this helps make this job easier. Our brochure has flashing lengths and cut formulas for your convenience, plus a final inspection checklist.

The brochure provides guidelines for three principal areas:

  1. Replacing window from the interior side using a block frame window
  2. Replacing window from the exterior side using a block frame window
  3. Replacing window from exterior side using a nailing flange replacement window

OSI has also added information on QUAD® Advanced Formula Sealant or H2U Acrylic Urethane Sealant as the final touch to sealing the windows.

OSI Professional Grade Products for your project

OSI® Pro-Series® adhesives & sealants are designed to meet the demanding requirements of the professional building trades. Contractors and Builders depend on Henkel to deliver quality adhesives and sealants for superior results.