40SK Densifying Sealer & Water Repellent

Deep-Saturating, Permanent Protection + Concrete & Stone Densification

Due to current shipping status in Canada, please allow 3–7 business days handling time.

If you are a professional or contractor purchasing 5 gallons or more, contact us for preferred bulk pricing.

40SK Densifying Sealer & Water Repellent is the ultimate solution for concrete and stone sealing, waterproofing, and densification. Formulated with STAIN-PROOF® deep-penetrating technology, it strengthens porous materials from the inside out—filling capillaries, reducing permeability, and creating a permanent barrier against water, salts, and freeze-thaw damage.

This invisible, breathable treatment is ideal for protecting high-traffic and high-exposure areas, while maintaining the natural colour and texture of the surface. Once cured, it delivers lifetime sealing and densifying performance, backed by a 25-year written warranty when applied by an Accredited Applicator.

Key Benefits

• Dual-Action Protection – Water repellency plus densification for softer materials like concrete, limestone, and sandstone

• Permanent Bonding – One treatment provides lifetime protection; 25-year warranty with Accredited Applicator

• Salt & Freeze-Thaw Resistance – Prevents efflorescence, salt spalling, and winter de-icing damage

• Invisible Finish – Retains natural colour and texture, no surface film or shine

• Faster Drying Surfaces – Resists saturation, even after heavy rain

• Breathable Formula – Allows water vapour to escape, avoiding moisture-related cracking or spalling

• Low Maintenance – Keeps surfaces looking newer for longer, easier to clean and maintain

Suitable Applications

• Building facades

• Floors and walls

• Swimming pool surrounds

• Patios, garages, kitchens

• Public and private entertaining areas

• Driveways and walkways, including those exposed to salt or ocean spray

Applicable Surfaces

• Sandstone

• Limestone

• Travertine

• Concrete (including stamped or engineered)

• Brick

• Mortar

• Grout

• Stucco

• Hardboard

• Cement

Available in Canada exclusively through ContractorChem, your authorized supplier for STAIN-PROOF® professional-grade sealers and stone care solutions.