Stain-Proof 40SK Densifier + Sealer

Stain-Proof 40SK is a deep-saturating consolidator (densifier) and water repellent that hardens softer materials like concrete, limestone and sandstone while protecting them from water, salts, efflorescence and freeze-thaw spalling. It is invisible and breathable, making it a strong choice for Canadian driveways, pool surrounds and coastal properties exposed to de-icing salt or sea air.

Key benefits of 40SK Densifier + Sealer

• Densifies (consolidates) soft stone and concrete as it seals
• Permanent, invisible water repellent
• Protects against efflorescence, salt spalling and freeze-thaw spalling
• Protects stone from harsh annual pressure washing chemicals
• Breathable, so trapped moisture cannot freeze inside the material
• Guaranteed up to 25 years when installed by an accredited applicator

40SK Densifier + Sealer specifications

Who it is for

• Driveways and walkways treated with road salt
• Salt-water pool surrounds and oceanfront properties
• Limestone, sandstone and travertine outdoors
• Dry-stamped and composite stone pavers

How to use 40SK Densifier + Sealer

1. Clean the surface and allow it to dry fully.
2. Test a small area.
3. Apply evenly so the surface is saturated.
4. Remove any excess from the surface.
5. Allow to dry as directed on the label; ventilate and use respiratory protection indoors.

Using 40SK Densifier + Sealer in the Canadian climate

40SK is the Stain-Proof product specified for salt and freeze-thaw exposure. Water-borne salts from de-icers and sea air drive spalling and efflorescence; 40SK repels water while staying breathable.

40SK Densifier + Sealer compared

40SK Densifier + Sealer FAQ

What does a concrete densifier do?

It penetrates and consolidates the pores of concrete or soft stone, making the surface denser and more resistant to water and salts.

Is 40SK visible after application?

No. It retains the natural colour and finish.

Can I use 40SK with another Stain-Proof sealer?

Stain-Proof recommends 40SK for extra protection of soft stone under Premium Impregnating Sealer in freeze-thaw or salt-water settings.

Can I use it indoors?

Yes, with proper respiratory protection.

Do you offer bulk pricing?

Yes, contact us for pricing on 5 gallons or more.

Use with

• Prep: EffBOMB Efflorescence Remover
• Then seal: Stain-Proof Premium Impregnating Sealer
• Water-based alternative: Trident Break Wall
• Browse Paver and Concrete Sealers

StoneSealer Canada ships across Canada from British Columbia, priced in CAD. Contractor and volume pricing is available to account holders: email sales@stonesealer.ca. StoneSealer Canada is an authorized Canadian reseller of Stain-Proof (DryTreat / ICP Construction) sealers and cleaners and is not otherwise affiliated with the manufacturer. Published prices reflect minimum advertised price or above.