Sika Plastix 22A Premium Grade Silicone Sealant - Caramel
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The Sika Plastix 22A Premium Grade Silicone Sealant in Caramel is a versatile, low-modulus, neutral-curing sealant designed for a broad spectrum of construction and industrial sealing tasks. It offers excellent performance for glazing, façade, and roofline applications, providing a waterproof and weather-resistant seal. A key benefit is its exceptional primerless adhesion to most common building substrates, simplifying application. However, users should be aware that while versatile, it is specifically a silicone sealant and may not be suitable for all material types or extreme chemical exposures.
All features
| Colour | Brown |
|---|---|
| Brand | Sika |
Extended Product Information
FAQs
Can Sika Plastix 22A be painted over?
Generally, silicone sealants are not designed to be painted over as paint may not adhere well to the silicone surface. For best results, consider painting the substrate before applying the sealant, or choose a paintable sealant if painting is essential.
What is the difference between low modulus and high modulus silicone?
Low modulus sealants, like Sika Plastix 22A, are more flexible and can accommodate greater joint movement. High modulus sealants are less flexible but may offer higher strength and better adhesion to certain substrates. Low modulus is typically preferred for facade and glazing applications.
How long does Sika Plastix 22A take to cure?
Curing time depends on bead size, temperature, and humidity. It typically skins over in about 15-20 minutes and fully cures within 24-48 hours for a standard 5mm bead at 23°C and 50% relative humidity.
Is this sealant suitable for use in a bathroom?
Yes, it is certified for sanitary applications (EN15651-3) and provides excellent resistance to moisture and mould growth, making it ideal for sealing around baths, showers, and sinks.
Can I use this sealant on metal roof flashing?
Yes, its excellent adhesion to metals and weather resistance make it suitable for sealing roof flashing and other metal roofline applications.
What is the shelf life of the product?
Unopened cartridges typically have a shelf life of 12 months from the date of manufacture when stored in cool, dry conditions between 5°C and 25°C.
Does it require a primer on glass?
No, Sika Plastix 22A offers excellent primerless adhesion to glass and many other common substrates.
Troubleshooting
Sealant not adhering properly
Ensure the substrate is clean, dry, and free from dust, grease, or old sealant. For challenging substrates not covered by 'excellent primerless adhesion', consult Sika technical data for a suitable primer.
Sealant is too stiff to apply
Check the temperature. The sealant may be too cold. Store it in a warmer environment before use if temperatures are below recommended application temperatures.
Uneven or messy bead
Practice applying the sealant on a scrap surface. Ensure consistent pressure on the gun and a steady movement. Use a tooling knife or spatula immediately after application to create a clean finish.
Sealant skinning too quickly
This is normal; apply and tool the sealant promptly after application. Work in manageable sections if necessary.
Pros and Cons
Pros
- Versatile for numerous construction and industrial uses
- Excellent adhesion to a wide variety of substrates without primer
- Durable, waterproof, and weather-resistant finish
- Resistant to UV radiation and chemicals
- Wide temperature resistance for various environments
- Low odor and fast curing properties
Cons
- Specific formulation may not be suitable for all niche applications
- Silicone-based, which can limit paintability and adhesion of subsequent coatings
- Requires appropriate surface preparation for optimal adhesion
- May not be ideal for extremely high-stress expansion joints where higher modulus sealants are preferred
Setup, Compatibility & Care
Setup:
- Ensure the application gun is compatible with standard 300ml cartridges.
- Cut the nozzle tip at an angle to achieve the desired bead size.
- Puncture the inner seal of the cartridge.
- Apply the sealant to the prepared joint using a smooth, consistent motion.
- Tool the sealant immediately after application using a suitable tool and wetting agent if necessary, for a neat finish.
Compatibility:
- Suitable Substrates: Glass, lead, polycarbonate, acrylic sheets, aluminium, uPVC, wood, concrete, masonry, and most common building materials. Excellent primerless adhesion is a key feature.
- Not Recommended For: Immersion in water for prolonged periods (refer to specific product data for high-exposure applications), or joints that will be painted over without proper surface preparation and compatible primers (as silicone can affect paint adhesion).
Care & Maintenance:
- Clean up uncured sealant with a cloth dampened with white spirit.
- Cured sealant can be removed mechanically or with specialized silicone removers.
- Avoid harsh chemical cleaners on the cured sealant, as they may degrade the material.