Max-A-Seal WP

Modified emulsion coating

Max-A-Seal WP® is a latex-modified anionic emulsion designed as a waterproofing coating for various applications. This product offers excellent waterproofing capabilities on asphalt, metal, wood, masonry, and foam surfaces. It is especially suitable for exterior below grade or between slab applications.

  • Versatile Protective Coating: Effective on a variety of substrates including asphalt, metal, wood, and masonry.
  • High Solids Content: Over 55%, ensuring robust application.
  • Environmentally Friendly: 100% asbestos-free with 0 g/L VOC content.
  • Self-Healing: Offers self-healing properties in certain applications.
  • Green Concrete Application: Can be applied to freshly poured, “green” concrete.

Tech Sheet
Safety Sheet
Sell Sheet


Max-A-Seal WP® can be applied using a brush, squeegee, or spray equipment. For effective coverage, apply 60 mils wet to achieve a 40 mils dry coating. The material should be applied uniformly, ensuring no translucence on the surface. It is easily sprayed with equipment such as a Graco GH833 Siphon Pump, using a 1/2” hose and a GHD 661 Spray Tip. In-line filters should be removed when spraying.


  • 5 gallon pails (18.9 L)
  • 55 gallon drums (208.2 L)
  • 275 gallon tote (1,041 L)
  • Bulk

Shelf Life

  • Shelf Life: 1 year from the date of manufacture when stored in the original, tightly closed container.
  • Storage: Do not store at temperatures exceeding 110°F.

Test Data

  • Solids Content: 64±3% minimum by weight (ASTM C1250)
  • Density: 8.1 lbs/gal±4 (0.92 G/cm2)
  • Application Methods: Suitable for airless spray, brush application.
  • Cure Time: 4-24 Hours
  • Elongation: 800% minimum
  • Adhesion to Concrete: Excellent
  • Low Temperature Flexibility: Remains flexible to –10°F
  • Water Vapor Permeance: <0.13 Perms
  • Air Permeability (ASTM E2178): <0.001CFM/ft2
  • Liquid Water Absorption: <0.5% by weight
  • Resistance to Degradation: Excellent against bacterial, algal, and fungal attacks.
  • Resistance to Chemical Attacks: Very resistant to acids and salts


  • Clean up with soap and water for personal hygiene before the material dries.
  • For tools and equipment, use SpecChem Orange Peel, a citrus-based cleaner.