Mv-888 Weatherproof Silicone Sealant
MV-888silicone weatherproof sealant is one component, neutral cure silicone sealant, designed for glass curtain wall, aluminum curtain wall and building exterior design, has excellent weathering properties, it can form durable and most building materials, waterproof and flexible interface.
Advantages
- Excellent UV and weather resistance for long-term outdoor performance.
- 100% silicone formulation for superior durability.
- Neutral cure system with low odor and non-corrosive properties.
- Primerless adhesion to most common building materials.
- Accommodates joint movement up to ±25%.
- Provides a waterproof and flexible seal.
- Suitable for extreme temperature conditions from -50°C to +150°C.
Technical Characteristics
Technical Data
These values are not intended for use in preparing specifications.
| Test Standard | Test Project | Unit | Value |
|---|---|---|---|
| Before Curing (25°C, 50% RH) | |||
| ASTM C 679 | Flow, Sagging or Vertical Flow | mm | 0 |
| - | VOC | g/L | <80 |
| GB13477 | Surface Drying Time | min | 30 |
| GB13477 | Curing Time | Day | 7–14 |
| Sealant curing speed and operating time vary according to temperature and humidity. Higher temperature and humidity accelerate curing, while lower temperature and humidity slow the curing process. | |||
| After 21 Days Curing (25°C, 50% RH) | |||
| GB13477 | Durometer Hardness | Shore A | 30 |
| GB13477 | Ultimate Tensile Strength | MPa | 0.7 |
| GB13477 | Temperature Stability | °C | -50°C to +150°C |
| GB13477 | Movement Capability | % | 25 |
| ASTM C 1248 | Pollution / Oil / Natural Weathering | - | No |
Application Details
- Glass curtain wall weatherproof sealing.
- Aluminum and metal curtain wall joint sealing.
- Enamel curtain wall sealing applications.
- Sealing joints between concrete and metal structures.
- Roof joint and exterior building joint sealing.
- General construction weatherproofing applications.
Application Process
Ensure all joint surfaces are clean, dry, and free from dust, grease, oil, and loose particles. Apply masking tape where neat joint lines are required. Cut the nozzle to the desired bead size and apply the sealant using a suitable caulking gun. Tool the sealant immediately after application for a smooth finish. Remove masking tape before skin formation. Allow the sealant to cure naturally. Full curing time depends on joint depth, temperature, and humidity conditions. Higher temperatures and humidity levels accelerate curing, while lower temperatures and humidity slow the curing process.
Packaging Sizes
- 300 ml cartridge – 24 cartridges per carton.
- 590 ml sausage pack – 20 sausages per carton.
- Color - White, Black, Dark Grey, Light Grey.
Storage & Shelf Life
- Store in original unopened containers.
- Keep in a cool, dry place at or below 27°C.
- Shelf life: 12 months from the date of manufacture when stored properly
Special Note & Safety
Product performance may vary depending on substrate type and application conditions. Conduct compatibility and adhesion testing before large-scale use. Curing speed is influenced by temperature and humidity. Technical data provided are typical values and should not be used as product specifications. Follow standard safety and handling practices during application.