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Miracle Sealants 511 Porous Plus Penetrating Sealer
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At a Glance
Quick Decision Guide
Container Size
Pint
Coverage
62.5–187.5 sq ft
Protection
Water, Oil & Stain Resistant
Finish
Invisible Natural Look
Application
Interior & Exterior
Service Life
3–5 Years
Food Safe
USDA Incidental Food Contact
Freeze/Thaw Protection
Yes
Why Choose This Product
Key Benefits
Porous-Surface Protection
High-solids formula penetrates absorbent stone, tile, grout, masonry, and concrete
Cross-Linking Molecular Bond
Reactive sealer strengthens and hardens the treated substrate below the surface
Water, Oil, and Stain Resistance
Helps repel moisture and common contaminants before they penetrate
Natural-Look Breathability
Forms no topical coating and allows moisture vapor to escape
Interior and Exterior Durability
Resists acid rain, salt intrusion, yellowing, and freeze/thaw damage
Long-Term Value
Lasts 3 to 5 years and averages 2 to 10 times the coverage of competitive products
Product Information
Product Details
Specifications
Brand
Miracle Sealants®
Part Number
PLUSPT6
UPC
753927511370
Product Type
Penetrating Sealer
Container Size
Pint
Coverage
62.5–187.5 sq ft
Formula
High-Solids Solvent-Based
Sealer Type
Penetrating
Protection
Water, Oil, Alkalis & Stain Resistant
Barrier Type
Cross-Linking Molecular Bond
Finish
Invisible Natural Look
Surface Coating
No
Moisture Vapor Transmission
Yes
Indoor & Outdoor Use
Yes
UV Resistant
Yes
Freeze/Thaw Resistant
Yes
Acid Rain Resistant
Yes
Yellowing Resistant
Yes
Slip Resistance
Increases Coefficient of Friction
Surface Strengthening
Yes
Grout Release
Yes
Typical Service Life
3–5 Years
Food Contact
USDA Incidental Food Contact
Ideal Surfaces
Granite, Marble, Quartzite, Travertine, Slate, Limestone, Sandstone, Grout, Concrete, Masonry, Brick, Ceramic Tile, Porcelain Tile & Quarry Tile
Limitation
Does Not Prevent Acid Etching
About This Product
Premium Penetrating Sealer for Porous Stone and Tile
Miracle Sealants® 511 Porous Plus is a high-solids, solvent-based penetrating sealer developed for porous natural stone, tile, grout, masonry, brick, and concrete. It resists water, oil, stains, alkalis, salt-ion intrusion, and freeze/thaw damage, giving absorbent surfaces deeper protection for demanding residential and commercial environments.
Cross-Linking Protection Below the Surface
The reactive formula penetrates the substrate and forms a cross-linking molecular bond that strengthens and hardens the treated material. Instead of creating a topical coating, this impregnator builds an invisible, water-shedding barrier while allowing moisture vapor to escape, preserving the surface's natural look without adding a visible finish.
Weather-Resistant Stone Sealer for Heavy-Use Areas
511 Porous Plus is designed for indoor and outdoor surfaces ranging from countertops, kitchens, bathrooms, and showers to patios, pool decks, walkways, driveways, restaurants, hotels, and retail spaces. Its UV-transparent, non-yellowing formula resists acid rain and increases slip resistance, supporting durable performance in frequently used installations.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What surfaces can Miracle Sealants 511 Porous Plus be used on?
511 Porous Plus is designed for highly porous tile, stone, grout, masonry, brick, and concrete. Manufacturer-listed surfaces include granite, marble, quartzite, travertine, slate, limestone, flagstone, sandstone, terra cotta, Saltillo tile, Cantera/Adoquin, polished stone, ceramic tile, porcelain tile, quarry tile, and grout.
How does the cross-linking formula protect porous surfaces?
The high-solids reactive formula penetrates the substrate and forms a cross-linking molecular bond with the surface. This strengthens and hardens the material while creating an invisible barrier against moisture and stains. Because it is not a topical coating, moisture vapor can still escape.
Will 511 Porous Plus change the surface's appearance?
The sealer is designed not to alter the surface's natural look and is UV-transparent, so it does not leave a visible coating or yellow with exposure. Substrates can respond differently, so the manufacturer recommends several inconspicuous test patches before treating the full installation.
What does 511 Porous Plus protect against?
It provides resistance to water, oil, alkalis, stains, salt-ion intrusion, weather, acid rain, and freeze/thaw damage. The formula also offers strong hydrophobicity and water shedding. However, it will not stop acid etching, so acid-sensitive stone can still be chemically damaged by acidic substances.
Can 511 Porous Plus be used indoors, outdoors, and around food areas?
Yes. 511 Porous Plus is suitable for interior and exterior heavy-use residential and commercial areas. Listed applications include countertops, kitchens, bathrooms, showers, floors, patios, pool decks, walkways, driveways, restaurants, grocery stores, hotels, locker rooms, stadiums, roofs, and other public spaces. It also meets USDA requirements for incidental food contact when cured and used as directed.
How long does 511 Porous Plus protection last?
The manufacturer lists a service life of 3 to 5 years and states that the treatment increases slip resistance and coefficient of friction. Actual longevity depends on substrate and use conditions, so monitor performance over time and follow the current label when deciding whether another treatment is needed.
How much area does 511 Porous Plus cover?
Typical coverage is approximately 500 to 1,500 square feet per gallon, with up to 4,000 square feet possible on polished stone. Coverage varies with surface texture and porosity. The product is available in 8 oz, pint, quart, and gallon consumer sizes.
Is 511 Porous Plus water-based, and how long does it take to cure?
No. 511 Porous Plus is a solvent-based formula containing mineral spirits, not a water-based impregnator. It is supplied ready to use and must not be thinned. The sealer becomes dry to the touch in approximately 1 to 3 hours and reaches full cure in 72 hours. Follow the current label and SDS ventilation requirements.