For sealing expansion joints, gaps and moving cracks in horizontal concrete and masonry. Paintable, sandable and stainable. Fast curing.

Fixes minor imperfections, nail holes and cracks Easy, quick and permanent repairs Use on furniture, antiques, woodwork, cabinets, doors, paneling, and accessories Easy to use, just like a pe

For Caulking And Sealing Around Windows And Doors, Gutters And Vents, Siding And Trim, And Molding.

For sealing joints and cracks in horizontal surfaces. Paintable, sandable and stainable.  

BOSS® 813 can be used on any commercial or residential construction where the code calls for a UL system for penetration of cables, etc. through drywall, concrete or wood.