Thompson's Water Seal 1L New improved formula Maximum protection against water damage to brick work, rendering, stone, concrete and wood Repels more water for longer than standard waterproofers Helps prevent damage caused by freezing and thawing Reduces unsightly efflorescence in brickwork. Ronseal Thompson's Water Seal uses hydrophobic technology to provide invisible protection against water damage. Its penetrating formula soaks deep into dry, porous exterior surfaces, creating a breathable membrane. This allows trapped moisture to evaporate while preventing water penetration and damage. Unlike some waterproofers, Thompson's Water Seal's unique formulation continues to waterproof even after the initial beading disappears. Resistant to UV light, it offers long-lasting protection even in harsh, wet conditions. With proper application, it provides effective water repellency for years, helping prevent damage from freezing and thawing. Features Invisible protection against water damage Penetrating formula for deep protection Breathable membrane allows moisture vapor to escape Long-lasting protection, resistant to UV light Helps prevent damage from freezing and thawing Suitable for brick, concrete, and stone For exterior use only Specifications Size: 1 litre MPN: 36284 EAN: 5010214862849