Weber Silicone Optima
Weber Silicone Optima is a one-component, ready-to-use acetoxy silicone sealant that cures with ambient moisture. Thanks to its permanent elasticity, strong adhesion performance, and resistance to UV exposure and temperature fluctuations, it provides a durable and reliable solution, especially for joint sealing applications in wet areas. Its mold-resistant formulation helps achieve hygienic and long-lasting results.
Product Description
Weber Silicone Optima is a ready-to-use, single-component acetoxy-based sealing silicone that cures through reaction with moisture in the air.
Advantages
- Provides permanent elasticity
- Resistant to UV rays and high temperatures
- Offers excellent adhesion performance
- Resistant to mold formation
Areas of Application
Weber Silicone Optima is recommended for:
- Joint sealing applications in wet areas such as bathrooms and toilets
- Horizontal and vertical filling applications
- General sealing and waterproofing works
Suitable Substrates
Can be safely applied to:
- Metal and aluminum surfaces
- Brick, ceramic, and marble surfaces
- Glass and galvanized steel sheets
- Various plastic materials
For applications on other substrates, technical evaluation is recommended.
Surface Preparation
- Joint surfaces must be clean and dry.
- Oil, paint, dust, and other contaminants must be completely removed.
- Glass and metal surfaces should be cleaned with a suitable solvent.
- Metal surfaces should be treated with an anti-corrosion primer if necessary.
- Masking tape may be used where required.
Application Conditions
- Application temperature: +5°C to +40°C
- Avoid application in extremely humid or very hot conditions.
- Do not apply on frozen surfaces or surfaces at risk of freezing.
Application Instructions
- Ensure full contact with both sides of the joint.
- Apply the material continuously and evenly.
- Apply in a single layer; do not overlap applications.
- The surface may be tooled with soapy water after application.
- Remove masking tape before complete curing.
- Application tools should be cleaned with acetone.
Consumption
Approximately 2.5 meters per cartridge for a 1 × 1 cm joint.
Warnings and Recommendations
- Can be applied to most surfaces without primer.
- Preliminary testing is recommended on glossy or highly absorbent substrates.
- Joint width should be approximately twice the joint depth.
- Not recommended for porous surfaces such as marble, natural stone, and concrete.
- Due to acetic acid release during curing, it should not be used on copper, brass, or mirrors.
- Not paintable.
- Not suitable for aquarium applications.
Technical Specifications
| Property | Value |
|---|
| Chemical Base | Acetoxy Silicone |
| Color | Transparent, White |
| Density | 0.95 ± 0.03 g/cm³ |
| Skin Formation Time | 11–12 minutes |
| Curing Rate | 2 mm/day |
| Tensile Strength | ≥ 1.80 MPa |
| Elongation at Break | ≥ 600% |
| Modulus (100%) | 0.4 – 0.5 MPa |
| Application Temperature | +5°C / +40°C |
| Temperature Resistance | –45°C / +150°C |
| Shore A Hardness | 12–15 |
| Packaging | 226 g / 240 ml |
| Shelf Life | 1 year |
Storage
- Store between +5°C and +25°C.
- Keep in a cool and dry place.
Safety Precautions
- Wear gloves, a mask, and safety goggles.
- Avoid contact with skin and eyes.
- In case of contact, rinse thoroughly with plenty of water and seek medical advice if necessary.
Frequently Asked Questions
Which surfaces can it be used on?
It can be applied to metal, glass, ceramic, aluminum, brick, and plastic surfaces.
Is it suitable for porous surfaces?
No. It is not recommended for porous materials such as marble and natural stone.
What is the curing time?
Skin formation occurs in approximately 11–12 minutes, while full curing progresses at a rate of about 2 mm per day.
Can it be painted?
No. Weber Silicone Optima is not paintable.
Can it be used in aquariums?
No. It is not suitable for aquarium applications.