Chem-Calk 2020 White Hybrid Sealant, 10.1 Oz Cartridge

Description

This one-component, moisture cure hybrid calk is built for lasting white, paintable joints across a wide range of dissimilar building materials.

Where This Calk Gets Used

The product bonds and seals vinyl siding, vinyl trim board, stone, masonry, wood, engineered wood, hardboard, aluminum, and a range of other metals. Trim carpenters and remodelers reach for this material where a joint needs to move with the substrate without yellowing or chalking over time, and where the bead has to accept paint cleanly once cured. Exterior trim, siding seams, and mixed-material transitions on a building envelope are typical placements, especially where the finished color has to stay consistent for years in direct sun.

How This Calk Holds Up

The hybrid chemistry cures moisture-activated to a stay-white, non-sag consistency suitable for vertical joints, and it resists the yellowing that plagues many one-part urethane sealants over time. It meets ASTM C920, Type S, Grade NS, Class 50, giving it the movement capability and adhesion needed for exterior trim and siding joints that see seasonal expansion and contraction year after year without cracking at the bond line. The non-sag consistency holds its tooled profile on vertical and overhead joints instead of slumping before it skins over.

Packaging and Specs

Order by the cartridge or the case for siding, trim, and general building envelope work, and keep a spare cartridge on the truck for punch-list touch-ups on finished elevations after the main install wraps. Browse our full MS hybrid adhesives and sealants line. Additional technical data and full color chart options are available from Bostik.

Need Help?

Need help matching this product to a specific siding or trim substrate? Call (800) 220-1966 or email [email protected].