3M Window Windscreen Sealer - Black
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3M Windscreen Sealer, Black, 310 ml - 08509 - UK Stock - Free DeliveryFree delivery in 1–3 days£31.76Visit shop →
OnBuy.com3M 08509 Window Windscreen Sealer 310Ml Cartridge Black 3134375405218
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3M 08509 Black Window Windscreen Sealer 310Ml CartridgeFree delivery in 1–3 days£28.80Visit shop →
Product Information
Full details
The 3M Window Windscreen Sealer (08509) is a professional-grade solution designed for automotive technicians and DIY enthusiasts who need a reliable, weather-resistant seal between glass and rubber gaskets. It excels at stopping water leaks and ensuring long-term structural integrity in automotive repair projects, though users should note that the fast-curing nature of the formula requires efficient application technique to ensure a clean finish.
All features
| Colour | Black |
|---|---|
| Model Part Number | 08509 |
| Brand | 3M |
Extended Product Information
FAQs
Is this sealant safe for all vehicle types?
It is designed for standard automotive glass and rubber gaskets, but always test on a small, inconspicuous area if you are unsure of material compatibility.
Can I use this to seal a cracked windshield?
No, this product is designed for sealing the perimeter of the glass into the gasket, not for structural repair of the glass itself.
Does this product remain flexible after drying?
Yes, it is formulated to stay flexible to accommodate vehicle vibration and thermal movement.
How long does it take to cure?
Cure times vary based on temperature and humidity, but it generally sets within 24 hours. Refer to the product packaging for specific environmental conditions.
Is this product paintable?
It is intended for use in rubber-to-glass channels and is not designed to be painted over.
Troubleshooting
Sealant is difficult to dispense from the cartridge.
Ensure the nozzle opening is sufficiently large and that the caulking gun mechanism is not obstructed.
Sealant is messy or smearing on the surrounding paint.
Apply painter's tape to the bodywork surrounding the glass before beginning the application to create clean edges.
Pros and Cons
Pros
- Provides a leak-proof barrier against water and air
- High-quality, reliable formulation from an industry-standard brand
- Easy to dispense using standard sealant cartridges
- Long-lasting durability that resists weathering
Cons
- Requires careful application to avoid excess mess
- Black color may be difficult to remove if it smears on paint
- Limited to specific glass-to-rubber gasket applications
Setup, Compatibility & Care
To prepare for application, ensure that both the glass and the rubber gasket are completely clean and free of oil, old adhesive residue, or debris. Use a lint-free cloth and an appropriate degreaser before starting. The 310ml cartridge is designed to fit standard caulking dispensers; cut the nozzle at a 45-degree angle to the desired width before application. Once the job is finished, store the cartridge in a cool, dry place and leave the nozzle on or seal it tightly to prevent the product inside from curing prematurely. Avoid contact with skin during application, and ensure adequate ventilation in your workspace.