Lorient AS Intumescent Fire, Smoke, Acoustic Seals - 2100mm

Lorient AS Fire, Smoke, and Acoustic Door Seals

Lorient AS fire, smoke, and acoustic seals provide comprehensive protection by combining fire resistance with effective smoke sealing, acoustic insulation, and thermal containment. Engineered to improve passive fire protection measures and acoustic performance around timber doors, Lorient AS seals deliver reliable protection tailored for modern commercial and public built environments.

Key Product Features:

• Choice of 3 finishes
• 10mm and 15mm wide options
• Single offset fin
• Black fin as standard
• 4mm depth
• Supplied in 2100mm lengths
• For single and double leaf door applications
• Low frictional resistance
• Integrated smoke and acoustic fin
• 4mm long black elastomeric fin
• Suitable for 30 minute fire door applications
• PVC encased sodium silicate core
• Suitable for 3mm - 4mm door gaps
• Heavy duty self-adhesive backing tape
• Certifire Approved CF330 + CF341
• Fire tested to BS 476-22: 1987 and BS EN 1634-1: 2008
• Ambient smoke tested to BS 476-31.1: 1983
• Acoustic tested to BS EN ISO 10140-2: 2010
• Durability: 100,000 cycles

Superior Acoustic Door Seal Performance

The Lorient AS seal integrates a single, offset acoustic fin. It is designed specifically to reduce both smoke and sound transmission through doors. By effectively minimising noise leakage, these seals create quiet, private, productive spaces—perfect for offices, conference rooms, hotels, and educational facilities.

Acoustic tested to standard BS EN ISO 10140-2, the Lorient AS ensures spaces meet noise reduction requirements without compromising door functionality. Combined acoustic, smoke, and intumescent strips provide a comprehensive seal around the head and edges of a door. For ultimate door sealing, install a door bottom drop seal and threshold plate, like the Lorient LAS8002.

Trusted Fire and Smoke Protection

When exposed to heat, Lorient intumescent seals rapidly expand to securely close gaps around fire doors, forming a robust barrier against flames and smoke. This rapid reaction provides critical additional time during evacuation, helping occupants exit safely while supporting emergency response efforts. 

Certified to BS 476: Part 22 and BS EN 1634-1 standards, Lorient AS seals provide dependable fire resistance for doors rated up to 30 minutes, reliably meeting UK fire safety regulations. Select the right width of intumescent strip to suit the fire test evidence of your door.

Additionally, Lorient AS acoustic, fire, and smoke seals prevent harmful smoke ingress. Effective smoke containment ensures safer escape routes and better protection for building occupants, significantly improving overall building safety standards. They comply with ambient smoke leakage requirements as outlined in Approved Document B when fitted to single action timber doors with a minimum thickness of 42mm.

Easy and Efficient Frame Installation

Designed for simplicity and practicality, Lorient AS seals come equipped with a strong self-adhesive backing. Installation involves minimal preparation— measure, trim, peel, and press firmly into the routed groove. This straightforward method reduces installation times - no pinning is needed. This makes it ideal for large-scale projects, refurbishments, or new-build developments where efficiency, alongside compliance, is the goal.

Available in a variety of colour options—including dark brown, white, cream, and grey—these seals blend into the aesthetics of any commercial environment. Suitable for fitting on both single and double leaf doors, the Lorient AS seal provides flexible solutions for various facilities. Choose seals to match or contrast with other items of fire door ironmongery, the door finish, or surrounding decor - blend in or stand out - the choice is yours.

Long-Lasting, Reliable Construction

Constructed from resilient materials, Lorient AS seals withstand daily use in demanding environments without degradation. Their durability ensures ongoing protection, maintaining consistent fire, smoke, and acoustic performance throughout the lifespan of the door assembly. 

As low maintenance components, the right choice of door seals can significantly reduce ongoing building maintenance expenses and operational downtime. Fire seals should be flush mounted with only the brush or blade seal protruding. With the AS seal, the smoke fin should form an uninterrupted seal around the door. If damaged or missing, fire and smoke seals should be replaced, like for like, as part of your regular door maintenance routine.

Comprehensive Door Protection Solution

Lorient AS intumescent door seals provide a comprehensive solution that meets multiple critical building requirements in a single, easy-to-install product. With superior fire safety, effective smoke containment, and outstanding acoustic insulation, these seals offer a complete package for facilities managers and passive fire specialists who require robust, dependable, and compliant door sealing solutions.