Astroflame Intumescent Duct Sleeve

Astroflame Intumescent Duct Sleeves are specifically designed to make fire-stopping duct penetrations quicker, easier, and more cost-effective for installers. Fitted from just one side of the wall or floor, each sleeve requires no specialist tools, additional mastic, or complex installation procedures. In many applications, a single sleeve can replace two traditional fire collars, reducing material costs and installation time. When exposed to fire, the intumescent material quickly expands to seal the duct opening and stop the passage of smoke and flames.

• Ideal for contractors and fire-stopping installers looking for a fast, compliant, and cost-effective solution
• Up to 2 hours fire resistance
• Quick and simple installation from one side
• No specialist tools or additional mastic required
• Available in a wide range of duct sizes
• Cost-effective solution – one sleeve can replace two fire collars
• Can be easily trimmed on site to minimise waste
• Allows for duct expansion and contraction
• Excellent acoustic insulation properties
• CE marked and tested to BS 476-20/22: 1987 & EN 1366-3: 2009