Gransil 233

Multi Functional, Silane/Siloxane Water Repellent Admixture

Gransil 233 is a nano-scale silane admixture specifically formulated for wholesalers to use as a principal ingredient, supplied at 55% active content. It makes concrete and masonry products water-repellent from within, eliminating the need for a topical sealer. Its ultra-fine particles, approximately 238 nm in size, disperse uniformly throughout the mix, significantly reducing water absorption while maintaining both breathability and appearance.

Typical dosages are just 1.0–3.0 fl. oz per 100 lbs of cementitious material, The result is durable, efflorescence-resistant concrete that stays drier, cleaner, and longer-lasting in any environment.

Key Features

Multi-functional silane/siloxane water-repellent admixture

Added directly to cementitious mixes, it turns concrete and masonry products intrinsically hydrophobic instead of relying on topical sealers.

Nano-scale dispersion (≈ 238 nm particles)

The ultra-fine emulsion (mean particle size ≈ 238.5 nm) spreads uniformly through the paste, creating a continuous moisture barrier throughout the matrix.

Dramatic water-absorption reduction

Test bricks treated with GranSil 233 showed an ~80 % drop in water pickup versus untreated controls over 28 days, ensuring long-term moisture defense.

Low, flexible dosage range

Typical loading is just 1.0 – 3.0 fl. oz per 100 lbs. of total cementitious materials, so formulators can fine-tune performance with minimal mix adjustments.




Benefits

✔ Nano-size, deep seal

✔ ~80% less water uptake

✔ Mix in 1.0 – 3.0 fl. oz / 100lbs

✔ One additive, all block types

✔ Integral, long-lasting repellency

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.