Natural Sealer

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Masonry Waterproofer and Penetrating Brick Stone Sealer

  • Penetrating Masonry Waterproofer - Invisible breathable protection for brick, stone, concrete, grout, slate, and other porous surfaces
  • Efflorescence Prevention - Prevents white mineral staining and mineral deposits on masonry surfaces
  • Freeze-Thaw Protection - Prevents spalling, cracking and moisture damage in harsh climates
  • Zero VOC Formula - Water-based, eco-friendly sealer safe for interior and exterior use
  • 2-Year Limited Manufacturers Warranty

Overview

Moisture destroys masonry from within: Water penetrates porous brick and stone, carrying dissolved salts that crystallize as ugly white efflorescence. In freezing climates, that trapped water expands, cracking and spalling surfaces beyond repair and causing thousands in irreversible damage.

Natural Sealer prevents this invisible damage with a breathable, nano-penetrating formula that lines pore structures without sealing them shut. Water beads off while vapor escapes, protecting historic restoration projects and new construction alike without altering the material's natural color or texture. Easy to maintain with occasional rinsing.

Lab-Tested Performance Data

  • Water Repellency: exceeds ASTM C67 brick absorption standards
  • Breathability: maintains ASTM E96 vapor transmission rates
  • UV Resistance: no yellowing or degradation (ASTM G154 1,000 hrs)
  • Efflorescence Prevention: blocks soluble salt migration per ASTM C1400

Environmental and Compliance Standards

  • VOC Content: zero (0 g/L) - LEED v4 compliant
  • Formula: water-based, no hazardous air pollutants (HAPs-free)
  • Compliance: California Prop 65, SCAQMD Rule 1113, CARB 2020

Recommended Applications

Historic Preservation: National Register properties requiring Secretary of Interior Standards-compliant treatments, landmark brick facades, and museum-grade limestone restoration.

Commercial Construction: LEED-certified building envelopes, architectural precast concrete panels, and CMU walls in ASHRAE Climate Zones 5-7 freeze-thaw regions.

Residential Hardscape: Interlocking concrete pavers (ICPI-compliant installations), natural flagstone patios, and brick driveways in HOA-regulated communities.

Call (888) 715-1747 or email info@flameoff.com for details

Product Details

  • Coverage: 200-600 sq ft/gallon (varies by ASTM C67 absorption rate)
  • Application: pad, roller, brush, or pump sprayer
  • Finish: invisible - preserves natural appearance
  • Cure Time: touch dry 30 min | Full cure 24 hrs
  • Container Size: 5-gallon
  • Shipping: ships in 3-5 business days. Expedited shipping options available

FAQ

It is an invisible, breathable sealer for porous stone and masonry that repels water, mold, dust, and efflorescence.

No, it penetrates deep to create a protective barrier without altering the natural look of the substrate.

Natural Sealer is primarily for moisture prevention, while Bio Block is specifically for algae prevention. For best results on algae-prone areas, use a cleaner first, then Bio Block, or use Natural Sealer for general water repellency.

Approximately 200-600 sq. ft. per gallon, depending on surface porosity.

Flood the surface using a pump sprayer. Apply a second coat while the first coat is still wet (approximately 10 to 15 minutes later).