Sealant Gorilla Waterproof Coat & Seal 473 ml — black, multipurpose waterproofing coating

Gorilla Waterproof Coat & Seal is a 473 ml black multipurpose waterproofing coating that forms a flexible, weather-resistant membrane on a variety of surfaces. Designed for exterior maintenance and small repair jobs, this sealant adheres to metal, wood, concrete and many plastics to seal leaks, joints and seams. The product cures to a durable, pliable layer that reduces water penetration and protects exposed surfaces from UV and weathering.

Advantages

The formulation provides rapid adhesion and remains flexible after curing, accommodating substrate movement without cracking. Its black finish blends with dark roofing materials and fixtures while offering long-term resistance to rain, moisture and moderate UV exposure. The coating is suitable for spot repairs and continuous seams, delivering an even film that resists peeling and blistering under normal outdoor conditions.

Suitable for

• Sealing roof leaks, flashing and joints
• Repairing gutters and downspouts
• Waterproofing outdoor fixtures, vents and chimneys
• Sealing seams on concrete, wood and metal surfaces

Key specifications

• Volume: 473 ml
• Color: Black
• Form: Viscous paste/coating suitable for brush or trowel application
• Properties: Flexible after curing, water-resistant, weather-resistant
• Suitable substrates: Metal, wood, concrete and many plastics

How to use

Prepare surfaces by cleaning away dirt, loose material, oil and rust; allow substrate to dry. Apply the waterproof coating directly from the container using a brush, trowel or putty knife, pressing the material into cracks, seams and joints to ensure full contact. Build up layers as needed for deeper voids, allowing appropriate drying time between coats. Once cured, the coating forms a continuous flexible membrane; finished areas can be painted if required by using compatible paints.

Usage recommendations

For best results, use at moderate temperatures and on dry substrates. Avoid application in heavy rain or on frozen surfaces. For high-traffic or load-bearing areas consult technical guidance for reinforcement options. Store the product in a cool, dry place and follow local disposal regulations for leftover material and containers.