Rust-Oleum Leak Seal Rubber Coating | 340G, Black
Rust-Oleum Leak Seal Rubber Coating | 340G, Black
R335.00
Rust-Oleum Leak Seal Rubber Coating is a durable, flexible black spray designed to seal leaks and cracks with a watertight barrier. This 340g aerosol applies easily to roofs, gutters, chimneys, and more, providing corrosion resistance and moisture protection for long-lasting performance in outdoor repair applications.
Rust-Oleum Leak Seal Rubber Coating | 340G, Black Details:
- Size: 340g
- Colour: Black
- Type: Rubberised protective coating
- Recommended Use Areas: Gutters, roofs, flashing, chimneys, PVC, downspouts, windows, RVs
- Not Recommended For: Rubber surfaces or continuous water immersion
- Drying Conditions: Apply outdoors or in well-ventilated spaces between 10°C and 32°C, humidity below 85%
- Application Surfaces: Porous and non-porous, dry only (not for wet application)
- Coating Method: Aerosol spray, buildable in layers with overlapping passes
- Coverage: 0.7–0.9 m² per can
- Cure Time: Tack-free in 15–30 min, touch dry in 2–4 hours, fully cured in 24 hours
What’s In The Box?
1 x Rust-Oleum Leak Seal Rubber Coating (340g, Black)
SKU: 265494
Rust-Oleum Leak Seal Rubber Coating Overview
Formulated for ease of use and quick sealing, this spray provides a watertight, flexible coating that protects against moisture, rust, and corrosion. It’s ideal for sealing joints, filling small cracks, or weatherproofing vulnerable external fixtures.
Rust-Oleum Leak Seal Rubber Coating Benefits and Features
- Watertight Protection: Prevents water entry and corrosion
- Flexible Bond: Maintains elasticity to accommodate material movement
- Easy Spray Application: Fast-drying and buildable with clear overlap guidelines
- All-Weather Seal: Designed for exterior exposure and temperature variation
- Versatile Use: Great for metal, plastic, and wood surfaces commonly found on roofs and exteriors

Steps to Follow for Using the Rust-Oleum Leak Seal Rubber Coating
Preparation:
- Clean and dry the surface thoroughly
- Use a wire brush to remove grime or flaking materials
- For glossy or painted surfaces, lightly sand if required—follow all safety precautions
How to Apply the Coating Rust-Oleum Leak Seal Rubber Coating
- Shake can vigorously for at least one minute after mixing ball rattles
- Hold 20–30 cm from surface and apply the first coat lightly
- Allow to dry for 15–30 minutes before applying a second, heavier coat
- Overlap passes by 2.5 cm and do not exceed three heavy coats
Cleanup & Storage:
- Wipe excess spray or overspray promptly
- Store can upright in a cool, dry area
- Allow 24 hours for full curing before exposing to water
A Few Scenarios Where the Coating Can Be Used:
- Sealing cracks on metal gutter seams
- Touching up vulnerable rooftop flashing
- Waterproofing window frame edges and downspouts
- Coating PVC joints in RV and outdoor structures
- Preventing corrosion around ventilation chimneys
Other Products You May Need for Your Waterproofing and Repair Projects
Health and Safety
Apply in open or well-ventilated areas only. Do not apply to wet surfaces or when rain is expected. Use appropriate safety gear if scraping or sanding. Keep out of reach of children and avoid inhalation or contact with skin and eyes.
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Additional information
| Weight | 0.453 kg |
|---|---|
| Dimensions | 7 × 8 × 20 cm |












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