Water Base High Strength Elastomeric Liquid Rubber - Wall & Foundation

In this review of AMES BWRF5 Water Base High Strength Elastomeric Liquid Rubber, the bottom line is simple: this kit is aimed at DIYers and contractors who need a versatile, thick waterproofing system for walls and foundations. The package combines a 5 gallon white, water-based elastomeric liquid rubber for broad surface waterproofing with a 1 gallon blue trowel-grade filler for joints and deep cracks. The single biggest reason to buy is the combination of a brushable/sprayable membrane that adheres to concrete and block plus a heavy trowel-grade product for filling gaps up to 5/8 in.

Key Features

• All-purpose waterproofing: The white liquid rubber creates a flexible, durable membrane that bonds to concrete, cinder block, wood and metal for long-term water resistance.
• High elongation: With very high stretch capability, the elastomeric formula accommodates movement in walls and foundations without splitting.
• Trowel-grade filler: The included blue Max trowel sealant fills joints, holes and cracks up to 5/8 in wide and cures to a waterproof seal.
• Multiple application methods: The water-based membrane can be sprayed, rolled or brushed, giving users flexibility for different surfaces and project sizes.
• Low odor and non-toxic: The formulation is low odor and easy to work with indoors, which helps when applying in basements and confined spaces.
• Made in USA components: The liquid rubber is positioned as made in the USA, offering assurance about formulation origin.

Who It's For

This kit is best for homeowners waterproofing basements, foundation contractors doing repair work on block and poured concrete, and renovators who need both a membrane and a trowel-grade filler for seams and flashings. It suits projects that require a durable, flexible coating that can be applied by brush, roller or sprayer, and where a thick filler is needed for concentrated gaps.

Those who should look elsewhere include users who need a very thin, paint-like product for fine cosmetic finishes or someone who requires specialized roof-grade membranes; this kit is formulated for walls, foundations and joint sealing rather than roof patches.

Pros & Cons

Pros

• Effective waterproofing on concrete, block and various substrates, offering strong water resistance.
• Includes both a membrane and a thick trowel filler so users can seal large gaps and coat broad surfaces.
• Low odor, non-toxic formula that is easy to apply and clean from tools.

Cons

• The membrane and trowel grades are quite thick, and some users may find the consistency challenging without the right tools or experience.

Specifications

Our Verdict

The AMES water-based elastomeric kit is a practical, value-oriented solution for anyone needing to waterproof basements and foundation walls while also filling seams and holes. It combines a flexible membrane with a heavy trowel filler so most repair and sealing tasks are covered, and its low odor makes indoor work easier. Buy this if you need a dependable wall and block waterproofer with strong sealability and multi-method application.

Frequently Asked Questions

Can this product be applied indoors in a basement?
Yes, the liquid rubber is low odor and water-based, making it suitable for indoor basement and foundation work when used with normal ventilation.

How wide a crack can the kit fill?
The blue trowel-grade filler is intended for joints and cracks up to 5/8 in wide; the liquid membrane will bridge and seal smaller gaps and surface imperfections.

What surfaces will it adhere to?
It adheres to concrete, cinder block, ICF, wood and metal surfaces, providing a flexible waterproof coating across those materials.