Bond It WP70 Silicone Sealant - Black
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Product Information
Full details
This guide is for DIY enthusiasts and professional tradespeople looking for a reliable, neutral cure silicone sealant. The Bond It WP70 in black offers strong, rapid sealing for external frames, but users should ensure proper surface preparation for optimal adhesion. It features a low modulus, neutral cure formulation ideal for weatherproofing around doors and windows.
All features
| Colour | Black |
|---|---|
| Model Part Number | WP70BL |
| Brand | Bond it |
Extended Product Information
FAQs
Can I paint over the Bond It WP70 Silicone Sealant?
No, silicone sealants, including the Bond It WP70, cannot be painted over. If a paintable finish is required, a different type of sealant should be used.
What is 'low modulus' and 'neutral cure'?
Low modulus means the sealant is very flexible and can stretch significantly without breaking. Neutral cure refers to the curing process, which releases minimal or no acetic acid, making it safe for use on sensitive materials like metals and plastics without causing corrosion.
How long does it take to fully cure?
The curing time varies depending on temperature and humidity. It typically skins over within minutes and becomes tack-free relatively quickly. Full cure for maximum performance might take 24 hours or more, but it is resistant to rain soon after application. Always check the product packaging for specific details.
Can I use this sealant for interior applications?
While designed for external frames, its neutral cure and good adhesion make it suitable for many interior applications where a durable, flexible, black seal is needed. However, ensure good ventilation during application and curing.
What is the shelf life of the sealant?
Unopened cartridges typically have a shelf life of 12 months when stored in cool, dry conditions away from direct sunlight. Once opened, it should be used promptly.
How do I clean up uncured sealant?
Uncured sealant can usually be wiped away with a clean cloth dampened with white spirit or a suitable silicone cleaner. Once cured, it must be mechanically removed.
Troubleshooting
Sealant not adhering well
Ensure the surface was completely clean, dry, and free from dust, grease, or contaminants before application. Reapply after thorough surface preparation.
Sealant is too soft or sticky after extended curing time
This may indicate insufficient curing. Ensure adequate ventilation and check environmental conditions (temperature, humidity). If it persists, there might be an issue with the product batch; contact the supplier.
Uneven or messy bead
Practice applying a consistent bead with the sealant gun. Use masking tape along the edges of the joint before application for clean lines, and tool the bead immediately after application with a damp tool.
Sealant shrinking or cracking
Ensure the joint width is appropriate for the sealant's capabilities. Overfilling a joint or applying in extremely thin layers can sometimes lead to issues. Reapply ensuring correct joint filling.
Pros and Cons
Pros
- Offers excellent weather resistance.
- Fast curing time speeds up jobs.
- Good adhesion to various substrates.
- Neutral cure formula is less likely to corrode sensitive materials.
- Low modulus ensures flexibility and durability.
- Discreet black colour blends well with dark frames.
Cons
- Requires clean, dry surfaces for optimal adhesion.
- May not be suitable for all types of plastics or highly porous materials without priming.
- Primarily designed for external perimeter sealing.
- As a silicone, it cannot be painted over.
Setup, Compatibility & Care Instructions
Setup:
- Prepare the Surface: Ensure the area where the sealant will be applied is clean, dry, and free from dust, grease, oil, and any loose material. Remove old sealant or paint if necessary.
- Cut the Nozzle: Using a sharp knife or sealant gun accessory, cut the nozzle tip at a 45-degree angle to achieve the desired bead size.
- Apply the Sealant: Insert the cartridge into a sealant gun. Apply a continuous, even bead of sealant along the joint or gap.
- Tool the Seal: Immediately after application, use a damp cloth, spatula, or tooling stick to smooth the bead for a neat finish. This is best done within 5-10 minutes of application.
- Curing: Allow the sealant to cure fully before exposing it to heavy rain or extreme conditions. Refer to product packaging for specific cure times, but typically it skins over rapidly.
Compatibility:
- Suitable for: Perimeter sealing of external door and window frames (uPVC, wood, metal, brick, concrete).
- Not Recommended For: Direct food contact, or applications requiring paintable sealant (as silicones cannot be painted).
Care:
- Once fully cured, the sealant is low maintenance. Clean any dirt or grime with a damp cloth and mild detergent. Avoid abrasive cleaners.
- If the seal needs to be replaced, cut out the old sealant carefully and reapply according to the setup instructions.