Sika Plastix 22A Silicone Sealant - Anthracite
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Product Information
Full details
The Sika Plastix 22A Silicone Sealant in Anthracite is a versatile, premium-grade sealant designed for a broad spectrum of construction and industrial applications, particularly ideal for glazing, façade, and roofline projects requiring a durable, waterproof, and weather-resistant seal. Its key benefit lies in its excellent primerless adhesion to most common building substrates, simplifying application and saving time. A potential caveat is that while it offers wide compatibility, testing on specific materials or coated surfaces is always recommended before full application to ensure optimal performance.
All features
| Colour | Grey |
|---|---|
| Model Part Number | PTDSIKDIRSKPLAS22AANTH |
| Brand | Sika |
Extended Product Information
FAQs
What is the typical cure time for Sika Plastix 22A Anthracite?
The surface will be tack-free in approximately 15-30 minutes. Full cure typically takes 24-72 hours depending on bead size, temperature, and humidity. For a 5mm bead at 23°C and 50% relative humidity, full cure is usually achieved within 24 hours.
Can this sealant be painted over?
No, silicone sealants are generally not paintable. Paint will not adhere well to the silicone surface and may peel or crack.
What is the service temperature range?
The sealant can withstand service temperatures from -50°C to +150°C.
Is this product suitable for use in bathrooms and kitchens?
Yes, it is suitable for sanitary sealing applications due to its waterproof and weather-resistant properties. Ensure proper ventilation during application and curing.
How long is the shelf life of the product?
Unopened cartridges typically have a shelf life of 12-18 months when stored in cool, dry conditions as recommended by the manufacturer.
Can I use this on plastic window frames?
Yes, it is suitable for perimeter pointing of uPVC and other plastic window frames. It is recommended to test adhesion on a small area first, especially on weathered or coated plastics.
What does 'low modulus' mean in relation to this sealant?
Low modulus means the sealant is very flexible and can accommodate significant joint movement (expansion and contraction) without stressing or breaking the bond. This makes it ideal for joints that are expected to move.
Troubleshooting
Sealant not adhering properly
Ensure surfaces are thoroughly cleaned, dry, and free from dust, grease, or old sealant residue. Re-clean surfaces with an appropriate solvent and reapply.
Sealant is too stiff to apply
Check if the product has exceeded its shelf life or has been exposed to extreme temperatures. Ensure the cartridge's foil seal is properly pierced.
Uneven or messy bead application
Practice applying with a caulking gun on scrap material. Ensure the nozzle is cut to the appropriate size for the joint width and maintain a consistent, steady pressure while drawing the gun along the joint.
Sealant remains tacky after application
This can be due to thick application, low temperatures, or high humidity, which slows curing. Allow more time for curing in appropriate conditions. Ensure adequate ventilation.
Pros and Cons
Pros
- Versatile application across construction and industrial sectors.
- Excellent adhesion to a wide variety of materials without primer.
- Durable and resistant to weather, UV, and chemicals.
- Fast curing and low odour for user convenience.
- Suitable for use on sensitive materials like soft metals and plastics.
Cons
- Requires proper surface preparation for optimal adhesion.
- May not be suitable for all painted or coated surfaces without prior testing.
- Specific cure times can vary based on temperature and humidity.
- While versatile, it's a specific silicone type and may not suit every extreme requirement (e.g., extreme abrasion).
Setup, Compatibility & Care
Setup:
- Ensure surfaces are clean, dry, and free from dust, grease, and loose material. For best results, degrease surfaces using an appropriate solvent.
- Cut the nozzle to the desired bead size.
- Apply sealant using a caulking gun, ensuring full contact with both surfaces to be joined.
- Tool off the sealant within 10 minutes using a damp tool or spatula to create a neat finish.
Compatibility:
The Sika Plastix 22A Anthracite is compatible with a wide range of common building substrates, including glass, aluminium, uPVC, wood, painted surfaces, concrete, brick, and plastics like polycarbonate and acrylic. It is also suitable for sealing soft metals such as lead, brass, copper, and zinc. Always test adhesion on a small, inconspicuous area or on a sample of the material, especially with coated metals, plastics, or aged paint finishes, before full application.
Care:
- Clean up excess uncured sealant immediately with a damp cloth or solvent.
- Cured sealant can be removed mechanically (e.g., cutting) or with specialized silicone remover products.
- Store cartridges in a cool, dry place away from direct sunlight and extreme temperatures.