Hippo Prestige 4 In 1 Silicone Sealant - Grey
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Product Information
Full details
The Hippo Prestige 4-in-1 Silicone Sealant is designed for professional contractors and serious DIY enthusiasts who require a reliable, high-performance sealant for versatile applications across kitchens, bathrooms, and glazing projects. Its primary advantage is its 20% permanent elasticity, which allows the seal to move with structures without cracking, ensuring long-term durability in both indoor and outdoor environments. While it offers excellent performance, users should note that as a low modulus silicone, it requires a clean, dry surface to achieve optimal adhesion, and it may not be suitable for surfaces treated with certain oil-based primers.
All features
| Colour | Grey |
|---|---|
| Model Part Number | H18684 |
| Brand | HIPPO |
Extended Product Information
FAQs
Is this sealant safe for use around my kitchen sink?
Yes, it is FDA Approved (21 §177.2600) and food-safe, making it perfectly suitable for kitchen sinks and cupboards.
Can I use this on natural stone?
Yes, the Hippo Prestige formula is specifically designed to be compatible with natural stone, including sills and benches, without staining the material.
Does this silicone require painting?
No, this is a permanent flexible sealant and is not designed to be painted over. Paint will not adhere well to the silicone surface.
How long does it take to fully cure?
Cure time depends on temperature and humidity, but it typically forms a skin within 10-15 minutes and achieves full cure over 24-48 hours depending on bead thickness.
Can I use this product outdoors?
Yes, it is fully UV and weather-resistant, making it ideal for exterior glazing and window sill sealing.
Troubleshooting
Sealant failing to adhere to the surface
Ensure the surface is completely dry and free from dust, grease, or previous sealant residues. Re-clean with a solvent and allow to dry before re-applying.
Sealant appears uneven or bumpy during application
Ensure the nozzle is cut at the correct angle and maintain a consistent pressure on the sealant gun trigger. Use a smoothing tool immediately after application to level the bead.
Mould appearing on the surface of the cured seal
While the product is mould-resistant, ensure the area is well-ventilated and regularly cleaned to prevent soap scum and organic buildup, which can support mould growth.
Pros and Cons
Pros
- High flexibility with 20% permanent movement accommodation
- Excellent resistance to mould and mildew in damp environments
- Suitable for a wide range of materials including natural stone
- Certified food-safe for kitchen applications
- UV and weather resistant for exterior use
Cons
- Requires completely dry and clean surfaces for proper adhesion
- Not paintable over with standard paints
- 300ml cartridge size may be insufficient for very large-scale commercial projects
Setup, Compatibility & Care
To ensure the best results, start by preparing your substrate. All surfaces must be clean, dry, and free from dust, grease, or old sealant residue. For non-porous surfaces, use a solvent cleaner to remove all contaminants.
- Cut the nozzle to your desired bead width at a 45-degree angle.
- Load the 300ml cartridge into a standard skeleton sealant gun.
- Apply the sealant steadily to the joint, ensuring full contact with both surfaces.
- Tool the joint within 10-15 minutes using a smoothing tool or gloved finger dipped in a mild detergent solution to achieve a professional finish.
Store the cartridge in a cool, dry place away from direct sunlight. Once opened, it is recommended to use the product within a reasonable timeframe to prevent nozzle curing.