Bonding Adhesive - 2.5 Litre
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Product Information
Full details
The ClassicBond EPDM Bonding Adhesive (2.5L) is a high-strength, contact-based adhesive engineered for professional-grade EPDM flat roofing installations. It is ideal for contractors and DIY enthusiasts looking to secure membrane onto horizontal, steep, or vertical surfaces such as timber, concrete, and metal. While it offers an incredibly secure bond, users must note that it requires a dual-application process on both the substrate and the membrane backing to achieve optimal results.
All features
| Model Part Number | 521009 |
|---|---|
| Brand | ClassicBond EPDM |
Extended Product Information
FAQs
Can I use this on wet surfaces?
No, the surface must be completely dry and clean to ensure a proper bond.
How much area does one 2.5L bucket cover?
A 2.5-litre bucket typically covers 4-5 square metres, depending on the porosity of the substrate.
Is this adhesive suitable for vertical upstands?
Yes, this adhesive is specifically designed for vertical and steep surfaces.
Do I need to apply adhesive to both the roof and the EPDM?
Yes, for the best bond, apply the adhesive to both the substrate and the underside of the EPDM membrane.
What is the best way to apply the adhesive?
The adhesive should be applied using a standard short-pile or medium-pile paint roller for an even finish.
Can this be used on PVC surfaces?
Yes, the adhesive is compatible with PVC, provided the surface is clean and prepared correctly.
Troubleshooting
Adhesive not sticking to the substrate
Ensure the surface is completely clean and free of dust or moisture; contact adhesives require a clean, dry surface to bond properly.
Membrane bubbling after application
Bubbles are often caused by trapping air during installation. Use a broom or heavy roller to press the membrane firmly into the adhesive starting from the center and working outwards.
Adhesive is too thick to roll
Ensure the bucket has been stored at room temperature. If it is too cold, the viscosity increases, making it difficult to spread evenly.
Pros and Cons
Pros
- Excellent adhesion on vertical and steep roof surfaces
- Compatible with diverse construction materials like metal and masonry
- Reliable, professional-grade formula
- Easy to apply using standard painting rollers
Cons
- Requires coverage of both surfaces, increasing total application time
- Limited coverage area per 2.5L bucket
- Specific handling required for contact adhesives
Setup, Compatibility & Care
Ensure that all surfaces are clean, dry, and free of oils, grease, or loose debris before starting application. Using the adhesive on damp or dusty surfaces will significantly weaken the final bond. While the adhesive is designed for various materials, always verify that the substrate is structurally sound, as the adhesive is only as strong as the surface it is bonded to. For storage, keep the bucket tightly sealed in a cool, well-ventilated area away from heat sources to prevent the adhesive from thickening or drying out prematurely. Always use in a well-ventilated space and wear appropriate protective gear, as contact adhesives typically contain solvents.