Natural Seal
A penetrating, non-film-forming water repellent. It bonds into concrete, masonry, brick and porous stone, cuts water uptake and helps resist freeze-thaw damage and efflorescence, without leaving a film that peels or changes the look.
Why use it
- Penetrates and bonds, no surface film to peel
- Water-based, zero-VOC, no harmful fumes
- Keeps the natural look of the surface
- Breathable and UV resistant
- Repels water, mold, dust, efflorescence and freeze-thaw damage
- Simple pump-sprayer application
- 5-year limited warranty
Where to use it
- Concrete slabs and walls
- Brick and block
- Stucco and slate
- Pavers and concrete roof tile
- Porous natural stone
- Unmodified grout and unglazed tile
Industries
- Commercial buildings
- Parking structures
- Construction
How to apply
- Make sure the surface is clean, dry and sound. Remove all oil, dust, grease and dirt.
- Test a small, hidden area first.
- Shake the container for several minutes, and again every 15 to 20 minutes, to keep the nanoparticles mixed.
- Flood the surface with a pump sprayer.
- About 10 to 15 minutes later, while the surface is still wet, flood it again.
Specifications
| Type | Hydrophobic penetrating sealer, water-based, zero VOC |
|---|---|
| Coverage | 200 to 400 sq ft per gallon, depending on surface porosity |
| Drying time | Touch dry in 30 minutes, full cure in 24 hours (at 77°F and 50% humidity) |
| Finish | Invisible |
| Base | Water-based, breathable |
| VOC | 0 g/L |
| Category | Concrete & masonry |
| Warranty | 5-year limited |
| Pack sizes | 20 L (5.3-gallon) pail, in US stock · 1,000 L IBC tote, factory-direct |
| Minimum order | One 20 L pail. Bulk pricing from 500 L, mixed across products. |
| Delivery | 20 L pails: 2 to 5 business days by ground in the contiguous US. Canada and Mexico: timing confirmed at shipment. 1,000 L totes: typically 4 to 6 weeks from the port in Vietnam. |
| Documents |
Technical data sheet (PDF) Safety data sheet (SDS) on request |
Test results
- Fungal resistance, ABNT NBR 15301 and ASTM G3273-16: two-coat cement board samples in a tropical chamber for 14 days at 32°C and 98% humidity. Both samples were clear of visible growth at day 14; one showed trace growth on day 2 only. Quality Control Laboratory report 063/2025
Figures from the manufacturer's technical data. Coverage and drying times depend on the surface, temperature and humidity. Always test a small area first.
Natural Seal: common questions
Will it change how the surface looks?
No. It soaks in and leaves no film, so concrete, brick and stone keep their natural look.
How do I apply it?
On clean, dry surfaces, flood it on with a pump sprayer. Flood it again 10 to 15 minutes later, while the surface is still wet.
How far does a 20 L pail go?
About 1,050 to 2,100 sq ft, based on 200 to 400 sq ft per gallon. More porous surfaces use more.
How soon does it cure?
Touch dry in 30 minutes and fully cured in 24 hours, at 77°F and 50% humidity.
Natural Seal or Concrete Coating?
Natural Seal soaks in and keeps the natural look, for walls, brick and stone. Concrete Coating forms a protective film with a gloss or satin finish, for floors, decks and parking.
Other products
Algae Guard
XD Bio Cleaner
Metal Coating
Concrete CoatingNeed Natural Seal for a project?
Call 1-888-815-3370 for pricing, email info@nanocoatingsupply.com or send a quote request.
Product details summarised from ThinTech Coatings. Always follow the technical data sheet.