Liquid Rubber Medium Brown Waterproof Sealant 1 Gallon - Elastomeric

In this review the Liquid Rubber Medium Brown 1 gallon sealant is assessed as a DIY waterproofing option for homeowners and small contractors. The bottom line: it is best for projects that need a flexible, seamless membrane on metal, concrete or low-slope roofs where durability and ease of application matter most. The review finds the product delivers a professional-quality elastomeric coating that is water-based and low-odor, making it suitable for both exterior roof work and indoor foundation or basement patching where harsher solvents would be a problem.

Key Features

• Waterproof membrane: Forms a continuous, flexible rubber-like barrier that stops leaks on roofs, gutters and foundations without seams that can fail.
• Multi-surface adhesion: Bonds to metal roofs, concrete, planters and basement walls so one product can cover varied repair tasks around a property.
• Easy application: Applies like paint with a brush, roller or sprayer so no specialized equipment is required for most DIY jobs.
• Weather resistant: Works in wide temperatures from -40F to 150F and offers UV resistance and solar reflectivity for long life outdoors.
• Flexible performance: Offers high elongation so it expands and contracts with substrate movement, reducing cracking on roofs and foundations.
• Water-based, low odor: Uses a water-based formula with no harsh solvents, making it more pleasant for indoor repairs and safer to handle.

Who It's For

This 1 gallon size is ideal for homeowners tackling patch repairs on a barn roof, small flat roof sections, gutters, or foundation patches where a flexible seal is required. It also suits DIYers who prefer a low-odor, water-based product that can be applied with familiar painting tools.

Professionals with large roof projects or those who need a walkable surface should look elsewhere; the product can remain tacky after curing and is not recommended for high-traffic patios or decks. Also, larger commercial roof jobs will likely prefer the 5-gallon option for coverage efficiency.

Pros & Cons

Pros

• Easy to apply by brush, roller or sprayer, making DIY work straightforward.
• Provides a seamless, flexible waterproof barrier that resists UV and extreme temperatures.
• Water-based and low-odor, suitable for indoor foundation and basement repairs.
• Good adhesion to metal and concrete when surfaces are properly prepped.

Cons

• Can remain tacky after curing on some surfaces and is not suitable for walkways or decks.
• Coverage varies by surface; small 1 gallon quantity may run short for larger repairs if applied too thin.

Specifications

Capacity	1 gallon
Color	Medium Brown
Application	Brush, roller or sprayer
Temperature range	-40F to 150F
Elongation	Approximately 900% elongation
Recommended coats	2-3 heavy coats on slopes, 3-4 on flat roofs

Our Verdict

For DIYers and small-scale pros who need a flexible, low-odor roof or foundation sealant, this 1 gallon Medium Brown elastomeric coating is a sensible pick. It delivers long-lasting, UV-resistant waterproofing and is applied with common painting tools, though buyers should plan coverage carefully and avoid using it on walkable surfaces.

Frequently Asked Questions

How is it applied?
Apply to clean, dry surfaces with a brush, roller or sprayer and use 2-3 heavy coats on sloped areas or 3-4 on flat roofs for optimal protection.

Is it safe for indoor use?
Yes, the water-based formula has no harsh solvents and low odor, making it appropriate for indoor foundation and basement repairs when ventilation is adequate.

Can you walk on the cured surface?
No, the manufacturer notes the cured product can remain tacky and is not suitable for walking surfaces like patios or decks.