OB21 Premium Shower & Bath Silicone - Clear - 310Ml
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Product Information
Full details
The OB21 Premium Shower & Bath Silicone is designed for homeowners and professional tradespeople seeking a long-lasting, watertight seal for bathrooms, kitchens, and sanitary installations. Its primary benefit is a high-performance, anti-fungal formula that resists mould growth even in the most humid environments, though users should note that as an acetoxy-curing product, it releases a vinegar-like scent during the initial curing process which requires adequate ventilation.
All features
| Model Part Number | OB21 |
|---|---|
| Brand | OB21 |
Extended Product Information
FAQs
Is this silicone mould-resistant?
Yes, it contains advanced anti-fungal compounds specifically designed to inhibit the growth of mould and mildew.
Can I use this on a glass shower screen?
Yes, the OB21 silicone provides excellent adhesion to glass and is ideal for sealing shower screens.
How long does it take to cure?
It typically forms a skin within minutes, but requires 24 hours for a full cure depending on environmental humidity and temperature.
Can I paint over this silicone?
No, this silicone is not paintable. It should be applied after all painting is complete, or used in areas where no painting is required.
Is this suitable for outdoor use?
Yes, its UV and weather-resistant properties make it suitable for exterior applications as well as interior ones.
What should I do if I get it on my hands?
Wipe off excess with a dry cloth or paper towel immediately, then wash with soap and water.
Troubleshooting
Silicone is not sticking to the surface
Ensure the surface is completely free of soap, wax, and old silicone residue using a degreaser.
Sealant is peeling or cracking
The joint may be too wide or subject to excessive movement; ensure the bead depth is consistent and allowed to cure fully before use.
Strong vinegar smell persists
This is characteristic of acetoxy-cure silicone; ensure the area is well-ventilated during the 24-hour curing period.
Pros and Cons
Pros
- Excellent resistance to mould and mildew growth
- Remains flexible over time to prevent cracks
- Strong adhesion to glass, enamel, and ceramics
- Suitable for both indoor and outdoor applications
- High temperature threshold up to 180°C
Cons
- Acetoxy-curing process creates a strong acetic odor during application
- Not suitable for use on certain porous surfaces like natural stone
- Cannot be painted over after curing
- Requires professional-grade cartridge gun for application
Setup, Compatibility & Care
To ensure maximum longevity, apply only to surfaces that are dry, clean, and free from dust or oils. This product is compatible with non-porous surfaces like glass, glazed ceramic, and enamel. It is not recommended for use on acidic surfaces or certain natural stones which may stain. After application, allow the silicone to cure for at least 24 hours before exposing it to water. To maintain the finish, clean periodically with a soft cloth and mild detergent, avoiding harsh abrasive cleaners that could damage the sealant surface.