600ml foil sausage - Nullifire FS703 is a high-performance, fire-rated neutral cure silicone sealant designed to provide reliable fire, smoke, and acoustic sealing in construction and building service penetrations. Supplied in a 600ml foil sausage format and packaged in a box of 12, it is ideal for large-scale professional installation projects where compliance and efficiency are essential.
Also available in a 310ml cartridge for smaller applications and standard sealant guns.

FS703 cures to form a durable, flexible elastomer that maintains its integrity under high temperatures, helping to restore the fire resistance of wall and floor joints when used as part of a tested system.

Key Features

• Fire-rated silicone sealant for internal and external applications
• Tested for fire resistance in joint and penetration sealing systems
• Neutral cure formulation – low odour and non-corrosive
• Excellent adhesion to a wide range of construction substrates
• Permanently flexible once cured
• Suitable for movement joints
• Supplied in 600ml foil sausages (bulk pack of 12 for trade use)
• White finish for clean, professional application

Uses / Applications

Nullifire FS703 is commonly used in:

• Fire stopping linear gaps and construction joints
• Sealing around service penetrations (pipes, cables, conduits)
• Wall-to-floor and wall-to-ceiling joint sealing
• Curtain walling and façade systems
• Internal compartmentation systems requiring fire integrity
• Commercial, residential, and industrial construction projects
• Retrofit and maintenance fire protection works

Colour: White

Packaging: 600ml foil sausage

Pack size: Box of 12

Product Data Sheets
FS703 Technical Data Sheet
FS703 Safety Data Sheet
FS703 Declaration of performance

The above information is based on current test data, health and safety information and application instructions supplied by the manufacturer of the products. It is supplied for guidance and to the best of our knowledge is true and accurate. Customers should satisfy themselves to the suitability of the products in its intended use and no guarantee is given or implied as the conditions of actual use are beyond our control. If in doubt the customer should consult the designer of the project or the local building control. We would recommend that intumescent coatings are carried out by an approved applicator. 

Fire Stopping Shop, disclaim any liability for loss, damage or other expense which may arise from the use of this information, data or products referred to and reserve the right to amend or change any details without notice. This statement does not affect your statuary rights.