Gorilla Patch & Seal Liquid Rubber Waterproof Sealant, Black - Durable

In this review the Gorilla Patch & Seal Liquid Waterproof Sealant is evaluated for DIYers and homeowners who need a flexible, rubberized coating to stop leaks. The single biggest reason to buy is its self leveling, brushable formula that creates a continuous, paintable rubber membrane to seal out water, air, and moisture on exterior surfaces. The reviewer found it simple to apply by brush, roll, trowel, or pouring, and appreciated that when fully cured it remains temperature and UV resistant for long lasting repairs.

Key Features

• Flexible rubberized coating: Provides a pliable, waterproof membrane that moves with surfaces to reduce the chance of cracks reopening under stress.
• Multiple application methods: Can be applied by brush, roll, trowel, dip, or pouring to suit roof patches, gutters, or odd-shaped repairs without special tools.
• Self leveling formula: Smoothly covers small gaps and cracks for a watertight finish that reduces pooling and helps form a continuous seal.
• Temperature and UV resistant: Once cured, the coating tolerates outdoor temperature swings and sun exposure for longer lasting Gorilla Tough repairs.
• Paintable: Accepts both latex and oil based paints (use a primer with oil based paint) to match patched areas to surrounding surfaces.
• Works on many substrates: Suitable for metal, concrete, wood, brick, tile, glass, aluminum and more for versatile exterior repairs.

Who It's For

This product is best for homeowners, roofers doing small repairs, and RV owners who need an exterior waterproof membrane applied without specialized equipment. It is useful for patching roofs, flashing, gutters, skylights, chimneys, window seals and PVC joints where water intrusion and air leaks are a concern.

Those who need continuous underwater sealing or internal chimney/firebox repairs should look elsewhere, since the formula is not intended for continuous submersion or for inside the firebox. Also, users working on some plastics or rubber parts should test compatibility first, as the product may not work with all types.

Pros & Cons

Pros

• Creates a flexible, waterproof barrier that is paintable and resistant to UV and temperature changes.
• Versatile application-brush, roll, trowel, dip or pour-so it adapts to many repair scenarios.
• Self leveling properties help fill small cracks and provide a smoother, watertight finish.
• Compatible with many common building materials for exterior repair work.

Cons

• Some users report mixed results with sealability and drying time, so surface prep and mixing are important for consistent cures.
• Not suitable for continuous submersion or all plastics and rubber types, so it has limited use in some specialized applications.

Specifications

Product	Gorilla Patch & Seal Liquid Waterproof Sealant
Color	Black
Volume	32 ounce (pack of 1)
Finish	Rubberized, paintable coating
Application methods	Brush, roll, trowel, dip, pouring
Use	Exterior repairs: roofs, gutters, skylights, flashing, chimneys, PVC, windows
Limitations	Not for continuous submersion; not intended for inside firebox or chimney stack

Our Verdict

Gorilla Patch & Seal Liquid is a practical choice for DIYers and tradespeople needing a flexible, paintable waterproof coating that adheres to many exterior surfaces. With easy application options and UV/temperature resistance it offers solid value for typical roof, gutter, and flashing repairs, but buyers should follow prep and cure instructions carefully and avoid underwater or internal chimney uses.

Frequently Asked Questions

Can this sealant be painted?
Yes. The coating is paintable with latex or oil based paints; use a primer when coating with oil based paint.

Is it suitable for underwater repairs?
No. It is not intended for continuous submersion or below waterline use.

Which surfaces will it stick to?
It adheres to metal, concrete, wood, aluminum, brick, tile, fabric, glass and many common exterior materials, but test on some plastics and rubbers first.