Nasca Waterproof & Leak Seal Spray is your go-to solution for tackling those annoying and damaging leaks and cracks. This powerful 450ml aerosol spray delivers a fast and effective way to seal problem areas on contact, creating a tough, yet flexible, rubberised barrier. It’s perfect for both emergency fixes and preventative maintenance. The formula is designed to be highly elastic and UV-resistant, so it won’t crack under temperature changes or degrade in the sun, ensuring a long-lasting, weatherproof seal on a variety of surfaces from gutters and roofs to pipes and flashing.
Nasca Waterproof & Leak Seal Spray | 450ml Benefits and Features
- Instant Leak Sealing: The fast-acting formula forms a waterproof barrier on contact, providing immediate relief from leaks.
- Versatile Application: Can be used on almost any surface, including metal, wood, PVC, cement, and rubber, making it an incredibly useful tool for various projects.
- Durable and Flexible: The rubberised coating is both tough and elastic, allowing it to move with the substrate without cracking, which is essential for gutters and roofing.
- Weather and UV Resistant: Designed to withstand harsh weather conditions and resist degradation from sunlight, ensuring a long-term fix.
- Easy-to-Use Aerosol: The spray-on application is simple, clean, and requires no special tools, making it accessible for both professionals and DIYers.
- Quick Drying: The product is touch-dry in minutes and fully cured in 24 hours, so you can finish the job quickly.
- Multi-Use: Ideal for a wide range of applications, including repairing leaky gutters, sealing roof flashing, stopping drips from pipes, and sealing joints and seams.

Steps to Follow For Using the Nasca Waterproof & Leak Seal Spray
WARNING: USE IN A WELL-VENTILATED AREA. WEAR PROTECTIVE GLOVES AND EYE PROTECTION.
Preparation:
- Safety First: Ensure you are in a well-ventilated area. Wear safety glasses and protective gloves.
- Clean the Surface: For best results, the surface to be treated must be clean, dry, and free from oil, grease, dirt, and loose rust.
- Shake the Can: Shake the can vigorously for at least one minute to ensure the contents are properly mixed.
Application:
- Test Spray: Test the spray on a piece of scrap material to ensure the nozzle is working correctly.
- Apply from a Distance: Hold the can about 15-20cm from the surface.
- Spray Evenly: Spray in a smooth, even motion, covering the crack or leak with a generous coat.
- Second Coat: For best results and to ensure a full seal, apply a second coat after the first coat is touch-dry (usually within a few minutes).
After Use & Storage:
- Clear Nozzle: To prevent the nozzle from clogging, turn the can upside down and spray for a few seconds until only clear propellant comes out.
- Store Safely: Store the can in a cool, dry place, away from direct sunlight, heat, and open flames.
- Keep Out of Reach: Keep the product securely stored away from children and pets.
A Few Scenarios Where the Product Can Be Used:
- Gutters & Downpipes: Sealing small holes or leaks in metal or PVC gutters.
- Roofing: Providing a quick and temporary fix for minor leaks around flashing or small roof penetrations.
- Plumbing: Sealing small leaks in non-pressurised PVC pipes and joints.
- Vehicle Repair: Sealing leaks in a caravan or trailer.
Other Products You May Need to Complement Your Repairs
Health and Safety
- Ventilation: Use in a well-ventilated area to avoid inhaling vapours.
- Flammable: The aerosol can and its contents are highly flammable. Keep away from heat, sparks, and open flames.
- Keep Out of Reach: Store securely away from children and animals.
- Avoid Contact: Avoid contact with skin and eyes. In case of contact, rinse thoroughly with water and seek medical advice.
- Disposal: Do not puncture or incinerate the can. Dispose of it and any unused product according to local regulations.
- Read the Label: Always read and follow the instructions and warnings on the product label.
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