Soudal Fire Silicone B1 is a home improvement sealant designed to maintain fire separation and provide weatherproof joint sealing. That reassurance matters for builders and specifiers responsible for safety-critical sealing. Will the documented test standards and neutral cure chemistry match your project requirements?
⚡ At a Glance
- • Fire Resistance: BS476(20) 4hr fire rating, Warrington depending on configuration
- • Best for: Fire-stopping and sealing in construction joints where certification matters
- • Not ideal for: Situations requiring detailed substrate compatibility data prior to specification
Fire-rated neutral cure silicone, tested to EN 1366-4. Weatherproof formulation suitable for sealing joints under specified test configurations.
Maintain fire barriers - with BS476(20) 4hr fire rating
BS476(20) 4hr rating is recorded by Warrington, and applicability depends on installation configuration and joint design; the product is also tested to EN 1366-4.
Helps retain compartmentation for up to four hours under the tested conditions, when installed in the same configuration as used during testing.
Weatherproof sealing - with a weatherproof formulation
Weatherproof designation appears in the description, indicating the sealant was evaluated for exposure to external conditions.
Provides a durable external seal for exposed joints, helping to reduce water ingress risk where weather protection is required.
Neutral cure compatibility - with neutral cure silicone
Neutral cure silicone chemistry is specified in the description, distinguishing it from other cure types.
Suitable for projects calling for neutral cure chemistry; follow installation guidance to confirm compatibility with specific substrates.
✨ The 4 Key Reasons for Soudal Fire Silicone B1
- BS476(20) 4hr rating - Confirms fire integrity for sealed joints during standardised testing
- Tested to EN 1366-4 - Provides evidence for specifying penetration seals in projects
- Neutral cure silicone - Suitable for applications calling for neutral cure chemistry
- Weatherproof - Keeps joints sealed against rain and wind in exposed locations
📋 Technical Details at a Glance
- Category: Home Improvement
- Brand: Soudal
- Product Type: Fire Silicone B1
- Format: 310ml cartridge
- Colour: Grey
❓ Frequently Asked Questions
Q: Is the sealant fire rated?
A: Yes, the listing records a BS476(20) 4hr fire rating, as noted by Warrington depending on the test configuration.
Q: Can it be used outdoors?
A: Yes, the description states the sealant is weatherproof, indicating suitability for exposed joints.
Q: What type of curing does it use?
A: Neutral cure silicone is specified, and testing to EN 1366-4 is recorded in the description.
🏆 Our Verdict
Soudal Fire Silicone B1 suits builders and specifiers who need a fire-rated, weatherproof sealant for construction joints. The combination of BS476(20) 4hr rating, neutral cure chemistry, and EN 1366-4 testing makes it appropriate where documented performance is required. Cost will vary between suppliers, but long-term value comes from documented test performance and reduced remediation risk.
