SIKA Sikaflex Construction Sealant, 12-Pack, 10.1 fl oz, Limestone – All-Purpose Polyurethane for Joints 1/2" or Smaller, Strong, Weatherproof, Paintable, Ideal for Masonry, Wood, Metal & Concrete

This one-component, non sag sealant is the choice for professional-grade quality while requiring only beginner-level DIY skills. It's also elastomeric, which gives the paste a rubbery texture and enables your joints to adjust without cracking or breaking. Seal windows and door perimeters, and fill gaps in walls, trim, flashing and more. It's resistant to aging and weathering, so the Sikaflex limestone caulk always looks its best. And it's both waterproof and water immersible, enabling use in moisture-heavy environments. The final cure is complete in about a week, depending on atmospheric conditions.

• TIGHT, STRONG SEALS — This Sika polyurethane sealant offers exceptionally secure adhesion while also allowing for a high elasticity that helps prevent cuts and tears
• WEATHERPROOF YOUR HOME WITH CONFIDENCE — Fills joints between brickwork, masonry, wood, concrete, and metal framing to prevent moisture infiltration
• BLENDS RIGHT IN — It's a self-leveling concrete caulk that you can paint, stain, or sand down so you don't even know it's there. It also won't stain surfaces, so it's easy to use
• TRULY TRUSTWORTHY — This product meets federal specifications and ASTM standards to ensure quality and safety; urethane-based formula reduces the level of radon
• QUICK AND SIMPLE TO USE — It comes in a 300 ml cartridge that easily pops into most electric, pneumatic, or hand-powered application guns. The narrow tip makes accurate placement worry-free