Silande MF889 Weatherproofing Silicone Sealant
High-Performance, Long-Lasting Weatherproofing for
Commercial and Industrial Applications
Features & Benefits:
- Superior Weatherproofing Performance, Creates a watertight, airtight barrier to prevent leaks and damage.
- Excellent Adhesion, Bonds securely to a variety of substrates, including glass, metal, concrete, masonry, aluminum, and stone.
- Long-Term Durability, UV-resistant and unaffected by temperature extremes, rain, snow, and high humidity.
- High Flexibility, Accommodates joint movement without cracking or losing adhesion, making it ideal for expansion joints.
- Neutral-Cure Formula, Non-corrosive and safe for use on sensitive materials such as coated glass and painted surfaces.
Product Description:
MF889 Weatherproofing Silicone Joint Sealant is a high-performance, neutral-cure silicone sealant designed for durable, long-lasting protection against air and water infiltration. Formulated for superior adhesion and flexibility, it is ideal for expansion joints, curtain walls, precast panels, and glazing applications in commercial and industrial buildings.
Engineered for harsh environmental conditions, MF889 maintains its elasticity and adhesion in extreme temperatures, UV exposure, and high humidity. It resists cracking, shrinking, and degradation over time, ensuring reliable weatherproofing for exterior and interior joints.
MF889 is designed for commercial, industrial, and residential construction projects, providing long-term protection in:
- Expansion Joints, Maintains flexibility and adhesion in building expansion joints, curtain walls, and precast panel joints.
- Perimeter Sealing, Ensures weatherproof seals around windows, doors, and curtain wall assemblies.
- Glazing Applications, Creates a strong, durable seal for glass-to-metal and glass-to-glass connections.
- Concrete and Masonry Joints, Protects against moisture intrusion and damage.
- Metal and Panel Systems, Ideal for sealing metal panels, cladding, and aluminum facades.
| Property | Value |
|---|---|
| Sealant Type | Weatherproofing Silicone |
| Color | Available in multiple colors |
| Cure Type | Neutral Cure |
| Adhesion | Glass, Metal, Concrete, Masonry, Aluminum, Stone |
| Movement Capability | ±50% |
| VOC Compliance | Low VOC |
| Packaging Options | 10.1 fl oz Cartridge, 20 oz Sausage |
| Temperature Resistance | -40°F to 300°F (-40°C to 149°C) |
| Shelf Life | 12 Months |
- ASTM C920 Class 50, Meets industry standards.
- ISO 11600, Certified for long-term performance and extreme weather resistance.
- VOC Compliant, Approved for LEED projects and green building applications.
- Surface Preparation: Ensure surfaces are clean, dry, and free of dust, grease, or other contaminants before application.
- Application: Cut the nozzle to the desired bead size and load the cartridge into a standard caulking or sausage gun. Apply the sealant in a continuous bead to ensure full joint coverage. Tool the sealant within 10 minutes to ensure proper adhesion and a smooth finish.
- Finishing: Allow the sealant to cure based on ambient temperature and humidity. Skin-over time typically occurs within 30 minutes to 2 hours. Partial cure occurs within 24 to 48 hours, with full cure reached in approximately 7 days. Remove uncured sealant with isopropyl alcohol or mineral spirits. Cured sealant must be removed mechanically.
