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Your cart is empty.Arm yourself against the elements with OSI Quad Window, Door & Siding Sealant. OSI Quad Window, Door & Siding Sealant is an all-season formula designed for superior performance on exterior window, door and siding applications, fiber-cement and vinyl siding, PVC trim, and much more. It can be applied to wet or dry surfaces, even at freezing temperatures and, unlike other sealants, it resists dirt and dust collection, yellowing and water washout. OSI Quad bonds without a primer to most common substrates like cedar, painted or stained woods, fiberglass, vinyl, coated aluminum, steel, metal, brick, masonry and concrete. With resistance to UV and extreme temperatures (20°F to 120°F) and proven wet surface application, OSI Quad is the versatile and durable choice for professional contractors. OSI Quad is self-tooling and once cured is paintable with latex paints. Our color specialists work closely with leading window, door and siding manufacturers to ensure perfect color matches. OSI Quad is composed of elastomeric polymers and high quality synthetic resins. OSI offers an arsenal of adhesives, caulks, and outdoor construction sealants for the true professional. OSI: Tougher Than the Elements.
bugger 1
Reviewed in the United States on July 29, 2024
Used this sealant after I put in windows in my camper porch just built, sealed them great no leaks and holds up well, great stuff is recommend using it works as it should
J. Nelson
Reviewed in the United States on October 30, 2024
Great color match and works great to seal exterior windows. This is the good stuff so be sure not to inhale the odors; strong and will give you a headache, but it will seal your windows even in the Texas heat.
Jacky
Reviewed in the United States on October 28, 2024
Liked how easy it was to apply and use. It does get a bit messy. The package does say not to use fingers when applying… don’t. It gets everywhere. But has held up against water!
John D.
Reviewed in the United States on September 28, 2023
Product is good n first time using it n it's messy maybe next time it will be nice job
Jack M.
Reviewed in the United States on June 30, 2023
Excellent quality caulking. Applies smoothly out of the gun, easy to smooth and work with excellent adhesion. High recommend.
Matt
Reviewed in the United States on June 1, 2023
Excellent flow and stays consistent for ease of usage. Product is some of the best on the market. Great seal and smooth final texture.
Dana C. Casper
Reviewed in the United States on December 19, 2021
We used this to caulk our LP smart side lap siding that we just installed on our house. We did the project in November and into December. The coldest day we caulked was 28° and it cured wonderfully. It is rated at 20° as the lowest application temperature. The cheaper stuff is only rated at 40° so it would not have cured. It is definitely a bit more difficult to work with, but it cures amazingly and if you need to caulk in cold weather, it's your best bet!!
Randy
Reviewed in the United States on November 2, 2020
This product hardens to a consistency that I think caulk should be. It has a little flex, but is very tough and sticks well. It's my go to for all outside caulk jobs. It comes in a lot of colors and matches well to all of my jobs. Take a look at the OSI website to see all of the colors, then order from Amazon.
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