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B&Q£29.99Visit shop - Masonry Protection CreamPremium Invisible Weatherproofing & Thermal Enhancement For BrickStoneAnd Render (Clear1 Litre)
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HydroLock Masonry Protection Cream is designed for homeowners and property maintenance professionals looking to improve the thermal efficiency and weather resistance of external building walls. By applying this breathable cream to brick, stone, or rendered surfaces, you create an invisible barrier that prevents moisture ingress while keeping the structure dry and warm, though success is highly dependent on proper surface preparation and clean application techniques.
| Colour | White |
|---|---|
| Model Part Number | 1412943 |
| Brand | B&Q |
It is generally not recommended to paint over this product, as the hydrophobic barrier is designed to repel liquids, which will prevent paint from adhering correctly.
While durability varies depending on exposure and surface type, the protection is designed to provide long-lasting weatherproofing for several years.
No, the product is designed to be invisible upon drying, preserving the original texture and color of your stone, brick, or render.
This product is specifically formulated for external walls; using it internally may trap moisture within the wall structure if it cannot breathe outwards.
Because it is breathable, it is generally safer for older masonry than non-breathable sealers, but always perform a patch test first.
Coverage depends on the porosity of your masonry; highly porous surfaces will require more cream. Check the container for specific coverage rates per square meter.
Usually caused by over-application or applying in temperatures that are too low; use a brush to redistribute excess cream while it is still damp.
The surface may have been too damp during application or the cream was absorbed unevenly; check for blocked pores or apply a second coat once the wall is completely dry.
This is normal during the curing phase; the cream will typically become invisible once the carrier has fully evaporated.
Before application, ensure the masonry surface is clean, dry, and free from loose debris, algae, or efflorescence. If there are cracks in the mortar, these should be repaired before treatment as the cream acts as a water repellent, not a structural filler. The product is compatible with most standard mineral substrates including clay bricks, natural stone, and cementitious renders. To maintain the barrier, inspect the wall surface periodically for signs of damage or heavy soot buildup. For cleaning, use low-pressure water or a mild detergent if necessary, taking care not to use harsh abrasive tools that might compromise the treated layer.
