Sealants & Specialty Repair Products

Karnak 502MS Karna‑Flex Sealant is a high-performance, rubberized mastic specifically engineered for sealing critical areas across a wide range of roof systems. Packaged in a 3-gallon pail, this single-component formula offers excellent workability and delivers a watertight, elastomeric seal that adapts to structural movement. It adheres exceptionally well to both dry and damp surfaces, making it ideal for year-round repairs in real-world jobsite conditions. Whether you're reinforcing seams,...

Compact and ready for precise roof repair tasks, the 30 oz tube of Karnak 502MS Karna‑Flex Sealant is your go-to sealant for tight details and quick touch-ups. This robust, rubberized formula maintains its elasticity, sealing joints and flashing components securely even when surfaces shift or weather conditions change. Designed for direct application via caulking gun, this small-size tube delivers a neat, concentrated bond—perfect for professionals who need dependable sealing without excess...

Karnak 671 Karna‑Seal is a single-component, moisture-curing silicone sealant designed for long-lasting exterior performance. With exceptional UV stability and high elasticity, it resists weathering, chalking, and hardening even in ponding water conditions. Rain-safe in just one hour and suitable for both horizontal and vertical applications, Karna‑Seal delivers clean, resilient protection without sagging or the need for mixing. Key Features 100% silicone formula with excellent UV resistance...