OSI

Buying Guide: OSI Sealants and Accessories

Window, Door and Siding Sealants
The OSI QUAD line is an all-season formula for exterior window, door and siding work, including fiber cement, vinyl siding and PVC trim. It can be applied to wet or dry surfaces, even at freezing temperatures, and the gray version is paintable. The H2U sealant is a water based acrylic urethane that cleans up with soap and water and is suited to indoor use.

Acoustical and Draft Sealant
OSI SC-175 is a latex based sealant made to reduce sound transmission and drafts in wall systems where a sound rated assembly is required. It stays flexible and adheres to wood, metal studs, concrete and drywall.

Foam Gun
The lightweight metal foam gun is intended for use with OSI QUAD foam. It has a detachable screw on tip and an instant cut off.

Frequently Asked Questions

What does OSI make?
OSI makes sealants for windows, doors, siding and trim, an acoustical and draft sealant for walls, and a foam gun for use with OSI QUAD foam. The sealants come in several colors, including white, black, gray and clear.

How do I choose the right sealant?
Choose by the job: the H2U suits indoor window and trim work, the QUAD line suits exterior windows, doors and siding, and SC-175 suits sound and draft control in walls. Match the color and tube size to your project, and follow the manufacturer's instructions for surface preparation and application.

Which foam gun works with OSI foam?
The OSI foam gun is intended for use with the OSI QUAD window and door system. Check the foam product you plan to use before you buy, and follow the manufacturer's instructions.