100mm FlueSnug By PipeSnug Boiler Flue Collar and Seal - Talon (Black) - PFSB100

A patented, airtight collar that instantly seals around a 100 mm boiler flue exit, replacing traditional mortar. Suitable for both internal and external use, it installs quickly into a standard 152 mm core-drilled hole and meets building regulations. Approved by major boiler brands, it prevents heat loss, pest ingress, and cracking over time.

• Instant airtight seal—no mortar required
• UV- and weather-resistant polypropylene + TPE construction
• Complies with Part L energy regulations and endorsed by boiler manufacturers