Bostik FP403 Fireseal Fire Resistant Hybrid Polymer Sealant White
Bostik FP403 Fireseal white one-component hybrid MS polymer sealant. Fire rated up to 4 hours for linear joints with ±25% movement capability.
The Bostik FP403 Fireseal Fire Resistant Hybrid Polymer Sealant is a one-component fire-resistant sealant offering up to 4 hours of fire protection for linear joints. It is a high-performance hybrid MS polymer sealant designed for demanding fire-resistant applications, supporting compartmentalisation and the integrity of fire-rated constructions.
Overview
Certified to EN 1366-4, this high-modulus sealant is suitable for both vertical and horizontal joints, making it versatile across a range of sealing tasks. In addition to its fire-stopping function, it contributes to improved acoustic performance, helping to reduce sound transmission between rooms. The sealant can be used for interior and exterior applications, and its UV and weather resistance supports long-term performance without cracking or degrading.
Key Features
- Fire rated for up to 4 hours, certified to EN 1366-4, EN 13501-1 (Class B-s1,d0), and EN 1634-3 (Sa and Class S200).
- Flexible hybrid MS polymer with ±25% movement capability, accommodating structural shifts.
- Contributes to improved acoustic performance in buildings.
- Suitable for sealing walls, floors, ceilings, and metal frames, and certified for all metal stud (gypsum) connections.
- Holds GEV EMICODE EC1 PLUS certification for very low volatile organic compound (VOC) emissions.
- Formulated for reliable performance in both interior and exterior environments.
- Supplied in a post-consumer recycled (PCR) cartridge.
Applications
Suitable for sealing linear joints in walls, floors, and ceilings, including metal stud (gypsum) connections, within fire-rated constructions. Its white finish and one-component format make it straightforward to apply across a range of joint types.
Dimensions and Weight
Width: 3.3, Depth: 1.5, Height: 4.3. Weight: 497 g.
Choose the Bostik FP403 Fireseal Fire Resistant Hybrid Polymer Sealant when a white, fire-resistant sealant with ±25% movement capability is required for linear joints in fire-rated constructions.
- Sealing linear joints in fire-rated constructions
- Sealing vertical and horizontal joints
- Sealing walls, floors, and ceilings
- Metal stud (gypsum) connections
- Colour: White
- Material: One-Component Hybrid MS Polymer
- Fire Rating: Up to 4 hours (linear joints)
- Movement Capability: ±25%
- Standards: EN 1366-4; EN 13501-1 (Class B-s1,d0); EN 1634-3 (Sa and Class S200)
- Acoustic Performance: Contributes to improved acoustic performance
- Emissions Certification: GEV EMICODE EC1 PLUS
- Application Use: Interior and exterior
- Packaging: Post-consumer recycled (PCR) cartridge
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Weight: 497 g
Always follow local regulations and product guidance.
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