Astroflame Passive Fire Protection Products

Trade Name: Astro DS Low Profile Duct Sleeve

Intumescent Duct Sleeve

Compact Duct Sleeve with 2 hr rating to EN 1366-3:2009., EN 13501-1 Construction covered.

Uncapped / Uncapped (Open | Open) fire tested as required for ventilation systems.

Suitable for use through a wide range of fire partition walls.

Reduced profile - 10-15mm thickness - allows installation at any position in the wall, even tight to the floor slab, without removing the top side.

Does not need metal sleeving.

Sleeve can be easily fitted and only requires access from one side.

Sleeve can be slit to allow retrofitting.

Astro DS Low Profile Duct Sleeve at Astroflame

View a range of styles

>> See more : Additional product images

>> Call us to order: 01329 844 500

>> Email us to order:


Astroflame Duct Sleeves maintain the integrity of fire rated walls penetrated by plastic ventilation ducts.

The new Low Profile Duct Sleeve is a more compact version of the original Astro DS Duct Sleeve that offers the same industry leading fire performance.

The Low Profile sleeves have been independently fire tested to BS EN 1366-3 in a full scale partition system with Uncapped/Uncapped pipe/duct end configuration as required for ventilation systems and assessed for use in series around multiple duct penetrations.

In the event of a fire the intumescent material of the duct sleeve expands and crushes the plastic ventilation duct, closing off this route to the fire for up to 2 hours. Fire test evidence is available for use within 30, 60 and 120 minute wall constructions including a variety of single and double layer plasterboard partitions.

Low profile duct sleeves need no additional metal cage or sleeving, can be slit for retro fitting over ductwork and CE Certification for Astro Duct Sleeveaccess is only required from one side. The slim dimensions (typically 10-15mm thickness) and compressible nature of the intumescent material allows tight fitting against the ceiling soffit without the need to remove the top edge.

The duct sleeves are available to fit common sizes of rectangular and circular plastic ventilation ducts.

CE InformationCE Marked Documents
'DoP's are 'Declaration of Performance'
'CoC's are 'Certificate of Constancy of Performance'






Product Availability

Astro DS Low Profile Duct sleeves are available in the following dimensions (nominal sizes). Packed - Individually.

Product Code

Product Description

Internal Width

Internal Height



Astro DS Duct Sleeve Low Profile





Astro DS Duct Sleeve Low Profile





Astro DS Duct Sleeve Low Profile





Astro DS Duct Sleeve Low Profile Circular


103 Diam



Astro DS Duct Sleeve Low Profile Circular


127 Diam



Astro DS Duct Sleeve Low Profile Circular


159 Diam


To Order & Specify

Please contact us and quote the following - Quantity / Product Code / Product Description / Size
Typical example:- 10 / AFDS110LP / Astro DS Duct Sleeve Low Profile / 110mm x 54mm x 180mm

>> Tel: 01329 844 500 or >> Email:

Test and Assessment Reports

BS EN 1366-3: 2009 / EN 13501-1 : Constructions Covered - Plasterboard Partitions, Solid Walls
Fire Ratings: EI120 minutes


For further information on installation requirements please contact the technical team on: tel 01329 844 500 or email

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel 01329 844 500 or email


Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth
tel 0800 023 2482
(01329 844500)
fax 0800 023 2483
(01329 844600)
tel +44 1329 844500
fax +44 1329 844600



Email Astroflame