Liquid Rubber Color Waterproof Sealant - Elastomeric Roofing Coating

In this review of Liquid Rubber Color Waterproof Sealant, the verdict is clear: it is a practical option for homeowners and DIY roofers who need a flexible, paint-on waterproof membrane for metal, concrete or low-slope roofs. The single biggest reason to buy is its ability to create a seamless, elastomeric barrier that resists movement and UV exposure, making it a good alternative to tar or patchy repairs. For anyone tackling leaks on gutters, foundations or camper roofs, this product delivers a professional-feeling result with straightforward application.

Key Features

• Multi-surface waterproofing: Works on metal roofs, flat and low-slope roofs, gutters, concrete and basement walls to stop water intrusion across several problem areas.
• Flexible elastomeric membrane: Forms a rubber-like coating with high elongation that accommodates movement and reduces cracking compared with rigid sealers.
• Water-based formula: Low odor and easier cleanup make it suitable for indoor and outdoor use where harsh chemicals would be undesirable.
• Simple application: Applies like paint with a brush, roller or sprayer so most DIYers can complete projects without specialized equipment.
• Long-lasting performance: UV resistant and rated for a wide temperature range so it holds up in varied climates and seasons.
• System compatibility: Can be combined with seam tape, geo-textile and primer for a stronger, more durable waterproofing system.

Who It's For

This sealant is well suited for homeowners, RV and camper owners, and small contractors who need an affordable, paint-like product to stop leaks on metal roofs, flat roofs and concrete foundations. Its water-based formula and brush or spray application make it accessible to DIYers who want a long-lasting waterproof coating without professional roofing equipment.

Those who should look elsewhere include anyone needing a traffic-bearing surface for walkways or decks, since cured product can remain tacky and is not intended for regular foot traffic. Also consider specialized commercial roofing systems if your project is large-scale or requires certified membrane warranties.

Pros & Cons

Pros

• Creates a seamless, elastic waterproof membrane that bridges gaps and seams effectively.
• Easy to apply with brush, roller or sprayer for DIY projects and small repairs.
• Water-based and low-odor, allowing indoor foundation or basement applications without harsh fumes.
• Durable and UV resistant, designed to remain flexible across a wide temperature range.

Cons

• Can be tacky after curing, so it is not suitable for walking surfaces like patios or decks.
• User reports vary on drying time and adhesion in some cases, so surface prep and primer are important for best results.

Specifications

Brand	Liquid Rubber
Product form	5 gallon liquid sealant bucket
Coverage	Approximately 150-250 sq ft per 5 gal (surface dependent)
Temperature range	Works from -40F to 150F
Elongation	Up to 900% elongation
Application	Brush, roller or sprayer; 2-4 heavy coats depending on slope
Formula	Water-based, low odor

Our Verdict

Liquid Rubber Color Waterproof Sealant is a strong value for DIYers and small contractors who need a versatile, paint-on waterproof membrane for metal roofs, flat roofs and foundation repairs. With easy application, high flexibility and a water-based formula, it provides durable protection when surfaces are properly prepped and, where needed, paired with seam tape and primer.

Frequently Asked Questions

Can I apply this with a sprayer?
Yes, it can be applied by brush, roller or sprayer; a sprayer often speeds application on larger roof areas.

Is it safe for basement or indoor foundation use?
Yes, the water-based, low-odor formula makes it appropriate for indoor foundation and basement wall waterproofing when ventilation is available.

Will it be suitable for walkable surfaces?
No, the product can remain tacky after curing and is not recommended for patios, decks or other regular foot traffic surfaces.