Liquid Rubber Color Waterproof Sealant - Elastomeric Roof Coating

In this review of the Liquid Rubber Color Waterproof Sealant, the bottom line is simple: it is a practical choice for homeowners and contractors who need a flexible, seamless waterproof membrane for roofs and foundations. The product stands out because it creates a durable, rubber-like barrier that stops leaks across a variety of surfaces while remaining water-based and low in odor. For projects that require heavy-duty sealing without specialized equipment, this 5 gallon option delivers coverage and long-term flexibility.

Key Features

• Multi-surface waterproofing: Forms a continuous, flexible membrane that can seal metal roofs, flat and low-slope roofs, gutters, concrete foundations and basement walls to prevent water intrusion.
• Professional-grade elastomeric performance: Provides a rubber cement-like barrier with very high elongation so it resists cracking and stays intact where rigid coatings fail.
• Easy application: Brushes, rollers or sprayers can apply the product to clean, dry surfaces so most DIYers can complete projects without renting specialty tools.
• Water-based and low odor: The formula avoids harsh chemicals and strong fumes, making it suitable for some indoor foundation or basement repairs when ventilation is available.
• UV resistant and temperature tolerant: Solar reflective properties and a wide working range protect the membrane from sun damage and extreme temperatures.

Who It's For

The sealant is best for homeowners, farm owners and small contractors who need a durable waterproof solution for metal roofs, flat roofs, planters, gutters and foundation walls. It fits repair jobs where creating a continuous, seamless coating is more important than foot traffic durability.

It is less suitable for high-traffic surfaces such as patios, decks or walkways since the cured product can remain tacky and is not formulated for repeated foot traffic. If a walking surface finish is required, consider a dedicated traffic-rated membrane.

Pros & Cons

Pros

• Creates a seamless, flexible waterproof membrane that bridges seams and penetrations.
• Water-based formula with low odor makes indoor foundation work more tolerable.
• High elongation and UV resistance improve long-term durability compared with rigid coatings.
• Easy to apply with common tools and covers 150-250 sq. ft. per 5 gallon bucket depending on surface.

Cons

• Can remain tacky after curing and is not suitable for walking surfaces, limiting some applications.
• Some users report variability in drying time and thickness, so multiple heavy coats and proper prep are important.

Specifications

Our Verdict

The Liquid Rubber Color Waterproof Sealant is a solid value for anyone needing a flexible, long-lasting waterproof membrane for roofs and foundations. It performs well where flexibility, UV resistance and easy application matter most, but it is not meant for surfaces that require walking durability. For standard leak repairs and comprehensive waterproofing systems, it is a dependable choice when used with proper surface prep and recommended seam tapes or primers.

Frequently Asked Questions

Can this be applied with a spray gun?
Yes, the product can be applied with a sprayer, as well as by brush or roller, which many users find speeds up large roof jobs.

Is it safe for indoor use in basements?
Because it is water-based and low odor, it can be used for basement foundation repairs with adequate ventilation and proper surface prep.

Will cured surface withstand foot traffic?
No, the manufacturer notes the coating can remain tacky and is not suitable for walkways, patios or decks; use a traffic-rated membrane for those areas.