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Fire-stopping sealant designed for aggressive exterior use on high-sheen surfaces (glass, aluminium) and in high-movement joints for up to 50% movement. Suitable to fire seal joints in
compartment walls and floors such as masonry to masonry, masonry to timber, masonry to steel - see the description below for a list of suitable surfaces and substrates.
- Up to 4 hours fire resistance - Tested to EN 1366-4
- Tested in gaps 10 - 220 mm
- Ideal for joints in flexible walls, rigid walls & floors, windows & door frames
- Airtight up to 600 Pa
- Superior elasticity
- Excellent tooling properties
- UV & weather resistance
- 20% Movement tested
- New: Now available in Black
Nullifire FS703 Intusil Fire Resistant Silicone Sealant provides a fire-stopping seal around high movement joints and is ideal for use in external aggressive environments, with high adhesion that applies to high-sheen surfaces like glass and aluminium. The mastic insulates and resists fire for up to 240 minutes with a water-resistant seal that is unaffected by moisture, offering a movement capability of up to 50%.
Sealing gaps and cracks in fire barriers and around services can be critical to slowing the spread of smoke and fire, saving lives with more time for evacuation. Use FS703 Intusil in the following applications:
- Block to block
- Block to steel
- Concrete to timber
- Block to concrete
- Plasterboard heads
- Floor movement seals
- Head of wall movement seals
- Slab edge seals
- Service movement seals
- Static linear joints (masonry to masonry/rigid wall/rigid floor/flexible wall)
- Window & door joints (masonry to timber/steel)
- Movement joints (20%)
Installation
- 2:1 ratio wall 240 minutes integrity; 240 minutes insulation
- 2:1 ratio floor 240 minutes integrity; 90 minutes insulation
- 3 mm over 100 mm Firetherm Backer 240 minutes integrity; 240 minutes insulation; 30% movement
- 10mm angled fillet to Intubatt edges or full depth plus fillet around services
Maximum Openings
- Linear gaps up to 50 mm x infinite length
Coverage
- 10 mm wide seal - 3.25 m approx.
- 15 mm wide seal - 1.35 m approx.
- 20 mm wide seal - 0.78 m approx
Fire Testing
- Tested at Exova BM Trada to BS EN 1366-4, BS EN 1366-3, BS 476/20/22
- Third party accredited by Exova Warrington Fire, certificate number CF 5340
IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY
Data sheet
- Interior / Exterior Use
- Exterior Use
- Single, Two or Three Pack
- Single
- Base Type
- Silicone
- Suitable For Use On
- Masonry
- Suitable For Use On
- Concrete
- Suitable For Use On
- Aluminium
- Suitable For Use On
- Glass
- Suitable For Use On
- Plasterboard
- Suitable For Use On
- Linear Joints
- Suitable For Use On
- Block
- Application Method
- Sealant Gun
- Product Usage Type
- Sealer
- Colour Family
- Black
- Colour Family
- White
- Colour Family
- Grey
- Fire Rating
- 240 Minutes
Questions
Question about the product
Noel Sigamoney on 2024-01-12 07:33:22 | Question:
i am wondering if this product (FS703) is compatible with 'Y' wall/RCM board? |
Answer from Rawlins’ Technical Team:
The testing data shows this product is suitable for application to the following substrates - AAC, Concrete, Steel and Timber substrates. | |
IMPORTANT SHIPPING & DELIVERY INFORMATION
Nullifire FS703 Intusil Fire Resistant Silicone Sealant is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT