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STAIN PROTECTOR™: Sealer for natural stone, pavers, polished concrete

Impregnating sealer – world-leading protection for stone, pavers, polished concrete

  • Stain Protector™ gives optimal stain protection by providing superior water and oil repellence.
  • Stain Protector™ is suitable for most types of porous building materials, including: Natural stone, brick, terracotta, concrete paving and polished concrete.
  • Stain Protector™ is suitable for indoor and outdoor surfaces, including: Floors, patios, kitchens, bathrooms, terraces, entertaining areas and pool surrounds (use Fortifier Plus for salt water pool surrounds).
  • Super-penetrating, permanent bonding technology for superior protection against efflorescence, picture framing, salt spalling, freeze-thaw spalling.
  • Retains surface colour, finish and slip resistance if applied correctly.
  • On outdoor surfaces, including natural stone, Stain Protector™ provides a very deep hydrophobic (water repellent) barrier which keeps water out of the pores near the surface of the material and reduces mould growth.
  • Highly breathable, allows water vapor to escape freely, and limits harmful moisture buildup inside the treated material.
  • Stain Protector™ is highly UV resistant, chemical resistant and heat resistant and stands up to commercial cleaning methods.
  • Treated surfaces remain to look good for longer and are easier to clean.
  • IMPORTANT: Chemforce is an Australian owned company with high quality labs and manufacturing factories and Stain Protector™ was developed and manufactured in our facilities in Sunshine West, Victoria, Australia.

Stain Protector™ impregnating sealer technology

  • Chemforce uses the latest modified silane impregnation technology. Chemforce modified silane molecules are 300-500 times smaller than other penetrating sealer technologies. This allows Chemforce impregnators to penetrate deep into the pore system and line the pores.
  • Chemforce impregnators also make permanent covalent bonds inside the pores, literally becoming part of the molecular matrix of the treated stone or other porous material to create a deep water and / or oil repelling barrier. The deeper penetration and permanent bonding together provide protection against salt spalling, efflorescence and picture framing as well as stain protection.
  • Chemforce impregnators are fully breathable. This means that while it stops water travelling through the treated area as a liquid, the water can evaporate and escape as water vapour (as a gas). This is important so moisture is not trapped inside the substrate.
  • Chemforce impregnators cause negligible change to the slip characteristics and appearance of stones and other porous surfaces (except for our enhancer which is designed to deepen the colour).

This picture was taken after 3 days of rain. The lighter patch of this concrete driveway in Sydney was treated with Fortifier Plus approx. 2 years prior to this picture.

Only a few minutes after the rain stopped the sealed area looked dry as the sealer had created a deep water-repellent barrier which stopped the water soaking into the concrete in that area. It took a few hours for the rest of the driveway to dry out.

Significance: Most people only think about stain protection, but the reality is that stains are the least permanent and easiest form of liquid damage to deal with. The deep water repellent barrier created by Chemforce Modified Silane Impregnators not only provide stain repellence, but also stop water ingress which hinders mould growth and provides protection again picture framing, efflorescence and salt spalling.

Kasmir Granite sitting in 3mm of water. Each piece also has a drop of water on top.



  1. TEST PRODUCT ON A SMALL, INCONSPICUOUS AREA FIRST. Allow a 24-hour cure time to determine the ease of application and desired results.
  2. Surface must be clean, dry and free of any residues.
  3. Apply when surface temperature is between 5-35°C (40 – 95°F).
  4. DO NOT thin product.



  1. Leave to penetrate for at least 10 minutes.
  2. Generously apply STAIN-PROTECTOR using low pressure hand sprayer, brush or microfiber / wool applicator. Very porous surfaces should have a mirror like wet look for at least 3-5 seconds. Avoid contact with surrounding areas.
  3. Before it dries on the surface, apply a second generous coat.
  4. Total application rate (for both coats combine) is one litre per 4 to 20 sqm (one gallon per 160 to 800 sq. ft) depending on surface absorption.
  5. After minimum 10 minutes but, before the second coat dries, thoroughly polish the surface with clean, white absorbent cotton or microfiber towels (or similar) to remove ALL product residue. If residue has begun to dry, moistening a cloth with Stain Protector™ to ease removal.
  6. Use an organic solvent e.g. alcohol or mineral spirits to clean equipment.
  7. Avoid moisture contact with the surface for six hours after application.


NOTE: Sealer will NOT prevent surface etching, scuff marks or mechanical wear and may lighten or darken some surfaces. Stain Protector™ repels water and oil, but not solvents, so solvent based materials, such as marking pen ink can still stain the treated surface, but will penetrate less, and be easier to remove. All spills should be cleaned up immediately to minimize absorption.

Advanced Application Guidelines

  1. Testing: Stain Protector™ must be allowed to cure for at least 3 weeks before undertaking stain tests, depth of penetration tests and other types of testing. This is because the specially designed modified silane molecules in the sealer take this long to migrate and find suitable bonding sites in the pores and to create secure covalent bonds. As more silane molecules bond inside the pores, the material becomes more oil and water-repellent.
  2. After 24 hours of cure time, the product will show some surface stain repellence and will not have bonded inside the pores. After 3 to 4 weeks cure time the oil and water repellence is optimal and, if broken in half, a medium porosity piece of polished granite will exhibit 5 to 15mm depth of penetration, depending on the amount of Stain Protector™ applied.
  3. Dense / Polished Surfaces: Stain Protector™ should be applied to polished surfaces with a microfibre / lamb’s wool applicator or brush or cloth, so the sealer is wiped over the surface. If the product is sprayed onto a polished surface it may bead up and leave parts of the surface untreated. Spraying is not recommended for polished surfaces.
  4. The product should be left to dwell for as long as possible after each application, to give the product plenty of time to penetrate.
  5. Highly Porous Surfaces: Very porous surfaces, such as some sandstones and limestones should be pre-sealed with a very light spray of Stain-Protector™ at least 8 hours before applying the 2 main coats. This pre-seal repels the main coats slightly, so they do not penetrate as much and this results in a higher concentration of sealer near the surface. When the product penetrates too deeply, product is wasted and there is not enough concentration of the product near the surface to provide maximum oil and water repellence which is desirable for optimal stain protection.
  6. NOTE: highly porous surfaces, such as sandstone, limestone and concrete pavers in a salt water or freeze-thaw environment should be dip-sealed with Fortifier Plus™.
  7. New Stone Installations: Apply the first coat of Stain Protector™ at least 8 hours prior to grouting. This acts as a pre-seal which stops the grout staining the stone and makes the excess grout mess easier to remove. After the grout dries and after thoroughly cleaning all of the grout residue from the stone, apply the second coat over the stone and the grout. PLEASE NOTE:
  8. Vertical Surfaces: Dwell time is crucial for penetration. On vertical surfaces you have much less dwell time than on horizontal surfaces. If you apply generous coats, the sealer will run down the wall. Method:
  9. Always start at the bottom of the vertical surface and work your way up. This means that if you over apply the sealer and it runs, it will run over an already sealed surface and will not leave streaks. Have clean white absorbent cloths handy to wipe up runs as soon as they happen.
  10. To maximize dwell time without the sealer running down a wall, apply 4 to 5 light coats of Stain Protector™. Give each coat time to penetrate, but it is important to apply the next coat while the surface is still damp. 10 minutes between coats).
    Place tarp or plastic sheets below to catch the excess drips.
  11. Protect Surrounding Areas: When spraying sealer near other materials (for e.g. window frames or planter boxes, cover the areas which you do not wish to treat. An easier method is to use a square of stiff plastic or cardboard as a shield with one hand, while spraying with the other hand. Note: If product overspray lands on adjacent surfaces such as window frames, it will make them water and oil repellent and the alcohol in Stain Protector™ can also mark or strip some paints, so it is important to thoroughly remove overspray with clean white absorbent cloths before it dries.


Shelf Life and Storage Guidelines

Best within 3 years of manufacture.
Keep container tightly sealed, in a well-ventilated place, at 2 – 30° Celsius (36 – 85° Fahrenheit).

Pack Sizes

1L (1.06Q); 5L (1.3 gallon), 20L (5.3 gallon)


4 to 25 sq m. per litre (160 – 1000 sq. ft. per Gallon).

Technical Data

High Active Content: >40%.
SG: ~0.89
VOCs >300g/L
Weight: 1L (1.06Q) = 0.93Kg (2Lb.); 5L (1.3G) = 4.8Kg (10.6Lb), 20L (5.3G) = 19Kg (41.9Lb),

Country of Manufacture