PRODUCT DESCRIPTION. Defender CSD 50 Sealer is a high-performance impregnating sealer developed to strengthen, consolidate, and protect porous stone and masonry surfaces from moisture, erosion, and environmental damage. Formulated with advanced penetrating technology, it bonds deep into the substrate to stabilise friable materials and deliver long-term structural integrity. This breathable sealer creates a powerful water-repellent barrier that prevents mould, mildew, salt attack, and surface degradation without altering the natural appearance of the surface. Perfect for both indoor and outdoor applications, Defender CSD 50 is the ideal solution for preserving sandstone, limestone, concrete, and other absorbent materials in high-exposure environments
KEY BENEFITS. Consolidates and strengthens fragile, porous substrates. Repels water while allowing the surface to breathe naturally. Protects against salt damage, erosion, mould, and mildew. Deep penetrating action ensures long-term performance. Suitable for a wide range of stone and masonry surfaces
FOR USE ON. Sandstone. Limestone. Concrete. Clay surfaces. Brickwork. Indoor and outdoor masonry. Heritage and restoration projects.