Thompson's Stain Block Damp Seal 2.5 litre

The Thompson's Stain Block Damp Seal 2.5L is a high-performance solution designed to seal and permanently cover damp, water stains, and other household marks in just one coat. Its advanced micro-porous formulation allows trapped moisture to escape while preventing stains from reappearing, making it ideal for problem areas on interior walls and ceilings. Suitable for application directly onto damp surfaces, this reliable damp seal creates the perfect base for decoration, allowing you to paint over it after just 4 hours.

Technical Specification

• Download Product Technical Data Sheet

• Download Product Technical Data Sheet

• Areas of Use: Interior walls and ceilings
• Coverage: Approx. 7m² per litre (depending on surface porosity)
• Number of Coats: 1–2 coats recommended
• Drying Time: 4 hours between coats, 4 hours before overpainting
• Application Method: Brush or roller
• Suitable For: Damp surfaces, water stains and household marks
• Formulation: Micro-porous (allows moisture to escape)
• Colour: White
• Finish: Matt (suitable for overpainting)
• Size: 2.5 Litres (2500ml)
• Seal Type: Damp seal
• Manufacturer: Ronseal (RSL)
• Manufacturer Code: 32010
• Stock Code: RSLTDS25L
• Barcode: 5010214803248
• Weight: 3.264kg
• Liquid: Yes
• Hazardous Material: Yes (1263)
• Quality Assured (ISO9000): No