Ames Blue MAX Liquid Rubber Waterproofer 5 Gal - Heavy Duty Seal

In this review of the Ames Blue MAX Liquid Rubber Waterproofer the bottom line is simple: this 5 gallon elastomeric coating is best for homeowners or contractors who need a strong, flexible waterproof membrane for concrete, wood or metal surfaces. The reviewer found the product delivers on long-term sealability because of its high adhesion and an exceptional 1200% elongation, which is the single biggest reason to choose it for basements, foundations and roof primers where movement and cracking are concerns.

Key Features

• 1200% elongation: Expands and contracts with the substrate to resist cracking and peeling over temperature and settlement cycles.
• Multi-surface adhesion: Bonds to concrete, wood and metal so it can be used on basement walls, insulated concrete forms, roofs and underlayments.
• Application versatility: Can be applied by brush, roll or spray allowing the user to choose the method that fits the project scale and access.
• Water-based formula: Non-toxic and VOC compliant in all 50 states, making it suitable for interior below-grade use and safer handling than solvent-based coatings.
• High-strength elastomeric membrane: Acts as both a sealant and a flexible coating to maintain waterproofness where substrates move.

Who It's For

Blue MAX is aimed at homeowners tackling wet basements, foundation repairs, roof priming jobs, and contractors who need a durable, flexible membrane for above and below-grade work. Its five gallon packaging suits larger DIY projects or multiple small jobs where a single pail covers significant area.

Those who want a fast-curing, tack-free finish right away or who need a thin decorative coat may want to consider other specific roof or coating products; some users note that drying time and odor can vary with conditions, so tight indoor rooms without ventilation could be less comfortable during application.

Pros & Cons

Pros

• Excellent sealability - customers report it keeps water out of basement cracks better than cement mortar.
• Strong adhesion and flexibility thanks to the elastomeric liquid rubber formulation.
• Easy to apply by brush, roller or sprayer which speeds larger jobs.
• Non-toxic, eco-friendly, and VOC compliant for safer use in many environments.

Cons

• Drying time is mixed in user reports; some find cleanup and full cure slower than expected in certain conditions.
• Durability and odor are generally good but had mixed feedback from some customers depending on application thickness and ventilation.

Specifications

Our Verdict

The Ames Blue MAX is a practical choice for anyone needing a flexible, adhesive waterproof membrane for foundations, basements, roofs and other surfaces where movement is expected. It represents good value for larger projects because of the 5 gallon size and proven sealability, though buyers should allow adequate drying time and ensure ventilation during application.

Frequently Asked Questions

Can I use this on a roof?
Yes, Blue MAX can be used as a primer on most roof types including metal and RV roofs, applied by brush, roll or spray.

Is it safe for indoor basement use?
Yes, it is water-based, non-toxic and VOC compliant, making it suitable for interior below-grade applications with normal ventilation.

What surfaces will it stick to?
It bonds to concrete, wood and metal and forms an elastomeric membrane to resist cracking and peeling.