Unmatched Protection. Ultimate Flexibility.
The Blue Max™ BMX5RG by Ames® is a premium-grade, water-based elastomeric liquid rubber waterproofer designed to tackle the toughest moisture challenges. Whether you're sealing a basement, foundation, roof, or underlayment, this 5-gallon powerhouse delivers industrial-strength waterproofing with eco-friendly performance.

Key Features & Benefits

• Extreme Flexibility: With an industry-leading 1200% elongation, Blue Max™ expands and contracts with the surface, preventing cracks, peeling, and leaks even under extreme conditions.
• High Adhesion Formula: Bonds powerfully to a wide range of surfaces including concrete, wood, metal, EPDM, masonry, cement backer board, and ICF, ensuring a long-lasting seal.
• Versatile Application: Ideal for above and below-grade waterproofing—perfect for foundations, basements, flat roofs, cisterns, ponds, fountains, and more.
• Eco-Conscious & Safe: Non-toxic, low VOC, and compliant in all 50 states. Made in the USA by a woman-owned, veteran-founded company.
• Color Transformation: Applies as light blue and cures to a dark blue, providing a visual cue for complete coverage and curing.
• Multi-Method Application: Can be brushed, rolled, or sprayed on vertical or horizontal surfaces with ease.

Technical Specifications

• Size: 5 Gallons (640 fl oz)
• Coverage:
  • As a primer: 1 coat at 100 sq. ft. per gallon
  • As a waterproofer: 2 coats at 50 sq. ft. per gallon
• Cure Time: Fully cures in 7–10 days; may be painted over with high-quality latex paint
• Dimensions: 12" L x 12" W x 13.75" H
• Material: Liquid Rubber
• Color: Blue (light when wet, dark when cured)

Recommended Use Cases

• Waterproofing basements, foundations, and crawl spaces
• Sealing flat roofs, RV roofs, and underlayments
• Protecting ponds, fountains, cisterns, and catch basins
• Priming surfaces before applying Ames® topcoats like Maximum Stretch™ for UV protection

Why Choose Ames® Blue Max™ BMX5RG?

• Durability You Can Trust: Built to withstand extreme wet conditions and environmental stress
• Flexible & Strong: Maintains integrity through seasonal changes and structural movement
• Safe for You & the Planet: Non-toxic and environmentally responsible