LAS Installers are OSI Certified and We Only Use the OSI Quad Max Caulking System
Discover the First Line of Defense Against the Elements. Simply put, OSI QUAD® MAX siding & window sealant delivers the toughness that really makes a job last. QUAD® MAX is the next generation of siding and window sealants, providing maximum durability and superior application performance for use in any condition.
QUAD MAX siding & window sealant is designed for sealing around interior/exterior windows, doors and siding. It bonds to a wide variety of materials without need for a primer such as fiber cement, cedar, brick, stone, coated aluminum, fiberglass, vinyl, PVC, stucco, EIFS, wood, glass, and flashing tapes and Kynar® coatings.