Specifier's Portal - Window and Door

The new QUAD Window & Door System picks up where the WINTeQ System left off, delivering the toughest sealant, foam and butyl flash tape ever developed. Led by the new QUAD MAX, the revolutionary 3-in-1 interior, exterior, and bedding sealant, the QUAD Window & Door System is the ultimate barrier against air and moisture.


- The Toughest Barrier Against Air & Moisture

- Maximize Energy Efficiency & Performance

- For Both New & Replacement Windows

- Backed by 15-Year Warranty Available For New Construction if You are an OSI Certified Installer

- QUAD MAX Exterior, Interior & Bedding Sealant Delivers Superior Performance

- QUAD Foam Low Pressure, Closed Cell Window Installation Foam Delivers Superior Protection

- Butyl Flash Rubberized Self Adhering Flashing Tape Provides Weather Tight Seal

Jobsite Support

Installation Drawings

Isometric installation drawings and cross section details in both PDF and DWG files

Light Commercial Protocol

OSI offers support throughout the project lifecycle to ensure proper product application

Training and Warranty

Register for one of our trainings and learn more about our warranties