Gransil 301
Water Repellent for Inorganic Construction Materials
Gransil 301 is a Silane-Siloxane concentrated mix, developed to make natural stone and masonry surfaces water-repellent.
Supplied at concentration of 50% silane-siloxane, it can be diluted with organic solvents.
Diluted solutions of Gransil 301 in organic solvents act as effective general-purpose water repellents for treating and priming mineral and highly alkaline surfaces.
Once applied, the active ingredients react with atmospheric moisture in the air as well as the substrate, yielding water-resistant properties while maintaining a high level of water vapor as neither pores nor capillaries are blocked.
Key Features
Concentrated 50 % Silane-Siloxane
High-actives blend that can be diluted with common organic solvents for cost-effective, scalable use on mineral substrates.
Deep Penetration, Tack-Free Drying
Wicks into pores yet dries without surface residue, delivering long-lasting protection that feels natural to the touch.
Breathable, Vapor-Permeable Barrier
Repels liquid water while allowing water vapor to escape, so pores remain open and substrates stay structurally sound.
Minimal Appearance Change
Maintains the original color and texture of stone, masonry, tile, and fiber-cement—no darkening or gloss.
Efflorescence & Weathering Control
Blocks capillary water uptake, preventing salt bloom and freeze/thaw damage for cleaner, longer-lasting façades.
Fast, Permanent Water Repellency
Reacts with atmospheric moisture; full hydrophobic performance is achieved within 24 hours of application.
Versatile Application & Substrate Range
Apply by flooding, spraying, or brushing to concrete, mortar, stone, pavers, decorative tile, and more; also serves as an exterior paint primer.
Benefits
✔ 50% Actives, dilute to save
✔ Deep-seal, tack-free finish
✔ Maintains wall breathability
✔ Quickly prevents efflorescence
✔ Full repellency in 24h
Sample Request
See the difference for yourself. Our products are engineered for performance, and we believe you'll notice it from the first application. Request a sample today and experience the quality, consistency, and innovation behind every formula.