Bostik Chem-Calk 1200 Silicone Sealant, Clear, 10.1 oz Cartridge

Description

The Chem-Calk 1200 sealant from Bostik is a one-component, moisture-cure 100% silicone built for the demanding perimeter and glazing work that fills a Chemical Concepts order sheet. It reacts with ambient moisture to build a flexible, UV-stable seal that holds up on nonporous substrates where a chalky urethane or a shrinking acrylic would fail within a season.

Where the Chem-Calk 1200 sealant earns its keep

Glazing crews reach for this product on aluminum curtain wall, glass storefronts, and ceramic tile because adhesion to those surfaces is exactly what a general-purpose sealant struggles with. Typical applications include perimeter sealing around windows, doors, and skylights, sealing metal window and door frames, and bridging dissimilar materials such as plastic trim against a metal frame or ceramic tile against a concrete sill.

The clear 10.1 oz cartridge fits any standard caulk gun, so there is no dispensing equipment to buy before a crew can start a punch-list of glazing repairs. Because it cures by moisture rather than a two-part mix, there is no pot life to manage and no ratio to get wrong on a ladder.

Chem-Calk 1200 sealant compliance on a spec sheet

Chem-Calk 1200 is NSF Certified to Standard 51, which covers food-zone and splash-zone applications, and it carries UL Recognition. It also meets CARB and SCAQMD low-VOC limits and the OTC Regulation VOC requirements, so it can go on a job in states with tighter air-quality rules without a substitution request. For contractors bidding public or LEED-adjacent work, having those certifications already documented on the cartridge saves a submittal cycle.

Chemical Concepts stocks the clear 10.1 oz cartridge for same-cycle shipment to glazing contractors, GCs, and maintenance crews who cannot afford a sealant that shrinks, yellows, or lets go at the joint. For a deeper look at how Chem-Calk 1200 compares to other one-part silicones on cure speed and joint movement capability, the Adhesive and Sealant Council’s overview of sealant technologies is a useful reference point.

Browse the full line of silicone and hybrid sealants Chemical Concepts carries for glazing, perimeter, and general construction work. Questions on cure time, joint design, or ordering by the case can go to (800) 220-1966 or [email protected].