XtraBond 250 – 100% RTV Silicone Sealant

XtraBond 250 from Premier Building Solutions is a premium 100% RTV (Room Temperature Vulcanizing) silicone sealant specifically formulated for professional stone installation applications. This high-performance sealant provides excellent adhesion to granite, marble, quartz, and porcelain surfaces while maintaining superior flexibility to accommodate natural stone movement and thermal expansion. The 100% silicone formulation delivers exceptional durability, UV resistance, and weatherability for both interior and exterior applications. Ideal for sealing countertop seams, backsplashes, sink perimeters, and other stone-to-stone or stone-to-substrate joints. The professional-grade formula resists mold, mildew, and staining while maintaining a clean, finished appearance. Excellent workability allows for smooth application and tooling. Available in clear and multiple colors to match various stone surfaces. Trusted by professional fabricators and installers for creating durable, watertight seals that protect stone installations and ensure long-term customer satisfaction.