Silande DJ-A3-MF889-F Fire-Rated Silicone Sealant
Fire-Proof, High-Performance Silicone
for Commercial & Industrial Firestopping
Features & Benefits:
- Up to 4-Hour Fire Resistance, Tested and certified under ASTM E814, UL 1479, and EN 1366-4, providing a reliable barrier against flame, smoke, and toxic gases.
- High-Temperature Resistance, Withstands extreme temperatures from -40°F to 482°F (-40°C to 250°C) without compromising performance.
- Superior Adhesion and Flexibility, Forms a durable, flexible seal on concrete, masonry, metal, glass, and wood, ensuring long-term joint integrity.
- Non-Sag and Easy to Tool, Ideal for vertical and overhead applications, allowing for clean and efficient installations.
- Moisture and UV Resistant, Maintains effectiveness even in high-humidity environments and outdoor applications.
Product Description:
The MF889-F Fireproofing Silicone Sealant is a high-performance, fire-rated joint and penetration sealant designed to contain the spread of fire, smoke, and toxic gases in commercial and industrial buildings. With a neutral-cure silicone formula, it provides exceptional adhesion, flexibility, and long-term durability, making it ideal for sealing fire-rated joints and penetrations in walls, floors, and ceilings.
Certified to meet ASTM E814, UL 1479, and EN 1366-4 fire protection standards, MF889-F ensures compliance with fire safety regulations while delivering outstanding moisture, UV, and weather resistance. Whether used in new construction or retrofit projects, it is an essential component of any passive fire protection system.
MF889-F is engineered for a wide range of firestopping applications, including:
- Expansion Joints and Perimeter Seals, Creates a fire-rated barrier for construction joints in walls, floors, and ceilings.
- Electrical and Mechanical Penetrations, Seals around cable trays, conduit, ductwork, and piping to prevent fire and smoke spread.
- Curtain Wall and Glazing Systems, Provides a fire-resistant seal between glass panels and perimeter wall openings.
- Fire-Rated Concrete and Masonry Joints, Ensures compliance with fire codes in commercial and industrial buildings.
- Firestopping in Healthcare and Data Centers, Protects critical infrastructure where fire containment is essential for safety and compliance.
| Property | Details |
| Sealant Type | Fireproofing Silicone |
| Color | Red |
| Cure Type | Neutral Cure |
| Fire Rating | Up to 4 Hours |
| Adhesion | Concrete, Metal, Masonry, Glass, Wood |
| VOC Compliance | Low VOC |
| Packaging Options | 10.1 fl oz Cartridge, 20 oz Sausage, 5 gallon drums |
| Temperature Resistance | -40°F to 482°F (-40°C to 250°C) |
| Shelf Life | 12 Months |
- Fire-Resistance Ratings: Tested according to ASTM E814, UL 1479, and EN 1366-4
- Environmental Compliance: Low VOC, meets LEED and Green Building Standards
- Industry Standards: Approved for commercial, industrial, and institutional projects
For best results, follow these application steps:
- Surface Preparation
- Ensure all surfaces are clean, dry, and free of dust, oil, or contaminants.
- Use a primer if required for better adhesion on certain materials.
- Application
- Cut nozzle at a 45-degree angle for the desired bead size.
- Load the cartridge into a standard caulking gun or use a bulk dispensing system.
- Tooling and Curing
- Smooth the sealant within 10 minutes of application using a putty knife or joint tool.
- Allow curing based on temperature, humidity, and joint depth (full cure time varies).
- Partial cure: 24-48 hrs, Full cure: 7 days, Skin over time: 30 min, 2 hrs
- Inspection and Compliance Check
- Verify adhesion and fire-resistance ratings before final project approval.
Cleanup
- Uncured sealant: Remove with a solvent such as isopropyl alcohol or mineral spirits.
- Cured sealant: Can be removed mechanically.
