GripSeal Slasto Stone Sealer

Slasto & Natural Stone Sealer

A deep penetrating, ready to use, weather resistant sealer for interior and exterior porous natural stone.

Gripseal Slasto &Natural stone sealant will waterproof, protect and aesthetically enhance porous stone surfaces. It prevents powdering and the penetration of dirt.

It is a non-toxic, weather resistant, water repelling, water-based sealant which is easy to apply. It contains a UV inhibitor which increases its sun-resistant properties and also retards bacterial and fungal growth. It provides a superior sheen finish that will protect and enhance the stone / concrete surface.

Please note: Ensure that the surface is sufficiently porous for sealing.

Product Applications:

Sealing of slate, natural stone, slasto, terracotta, quarry tiles, concrete floors, sandstone, cobbles, terrazzo tiles, plant pots, rosa stone and all other unglazed porous stone surfaces both indoor and outdoor.


Interior & Exterior Use

Stain Resistant

UV Resistant

Easy to Apply

Environmentally Friendly

Highly Durable

COVERAGE: 8 - 10 m2 per Litre per Coat – Depending on Surface Porosity.


  1. Ensure that the surface is free from dust, dirt, grease, oil and or solvents. Check that the surface is sufficiently porous (see porosity test).

  2. Use brush, sponge, sponge roller or spray gun to apply. Do not apply in direct sunlight. For best results, apply 2 thin, even coats. On surfaces with low porosity apply thin coats or dilute the first coat with 10% water to aide penetration. Allow 20 minutes between coats and 12 hours for the sealant to cure completely.

  3. Clean the GripSeal applicators with clean water directly after application.

GripSeal – Slasto & Natural Stone Sealer – Technical Specifications

GripSeal Slasto Stone Sealer
Drying Time: 20 min at 20 Degrees
Curing Time: 12 Hours
First Coat Absorption: 1 – 5 mm
Depending on porosity
Sealer Thickness: 22 – 27 Microns per coat
Resistance: Alkaline
Temperature Tolerance: -10˚C to 130˚C
Coverage: 8-12 m2 per litre
Varies according to porosity of substrate
Water Absorption: 0,20% to 0,25% after 300 Hours
Salt Test: 1000 Hours Satisfactory
Form: Liquid
Colour: Milky
In non-pigment form
Storage Conditions: Room Temperature
Shelf Life: 4 Years