Damp & Stain Block 400ml is a professional-grade solution designed to prevent and seal dampness and stubborn stains on various surfaces. This 400ml treatment effectively blocks moisture penetration, protecting walls and ceilings from damage caused by damp conditions. Ideal for use before painting or decorating, it ensures a clean, stain-free finish by neutralizing marks and preventing their return. Trusted by experts, this product offers reliable long-term protection against moisture-related issues.