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Fire Protection for Ductwork

We now stock a range of Fire Protection products

Product Spotlight

Bostik Acoustic Wrap

What We Supply

View Our Products

Specialist Insulation Supplies

Specialist Insulation Supplies

Specialist Insulation Supplies offer a full range of products for insulating pipes & ducts, and this is backed up with a first class service that offers our customers a prompt and efficient right first time delivery service. We are an independent insulation distributor that has been trading since 1962 and is well established in the supply of leading brand products into the HVAC market, we are conveniently located in Dunmow, which is approx. 1 mile from Stansted Airport, so this gives us fantastic access to London & the South East.

Within Our stock profile

Specialist Insulation Supplies keep a wide range of Armaflex & K-Flex Pipe Insulation, and also keep the Armaflex & K-Flex sheet in stock. We also offer a range of acoustic insulation products for pipework & ductwork and keep Muftilag acoustic insulation within the stock range. SIS also stock Paroc rock fibre insulation products, this range of products include HVAC pipe insulation and Icerock Ductwrap. We also keep a wide range of Isover Glass Fibre Pipe Insulation in stock. We have recently added Rockwool HVAC products to our product portfolio and have a wide range of Rocklap Pipe Section, Rockwool Ductwrap & Ductslab in stock.

Supaphen phenolic pipe insulation

Specialist Insulation Supplies are major stockists of Supaphen phenolic pipe insulation which is available in selection of finishes such as bright class O foil, Matt black foil or Proclad / Vapor-Fas covered, Supaphen is BREEAM Green Guide approved and has an A+ rating, the product is also Fire & Smoke safe, and has been tested to the European fire test standard EN13823. Phenolic Foam is a very efficient way of insulating both pipes & ducts and as it is a great insulant you are able to reduce the thickness of the insulation when compared to traditional products.

Kingspan Duct Insulation

Kingspan Therma™ Duct Insulation is a high performance thermal insulation designed for use on rectangular, circular and flat oval ductwork in HVAC / building services applications. It can be
used to insulate ductwork and associated equipment outdoors operating within the temperature range of –20°C to +80°C.

We also stock Kingspan Kooltherm Pipe section, and keep the range of pipe sizes in 15mm, 20mm, 25mm & 30mm in stock so is available for next working day delivery.

After moving to a purpose built unit approx. 7 years ago, we have now expanded our business and relocated into another purpose built unit in late 2019 which has more than doubled our storage capacity, and allowed us to expand our stock holding further. The move into the new premises is an exciting development in the growth and progression of SIS. This new unit has allowed us to expand our product range and now develop our stock holding of passive fire protection products to service the HVAC industry, we also have an area dedicated to customer collections which means that orders can be picked and will be ready for the customer when they come in to collect.

SIS have a sister business, Storehouse Safety Ltd that specialises in the supply of Personal Protective equipment (PPE) products and personalised workwear, they have their own dedicated website which can be found at

Specialist Insulation Supplies Ltd.
Specialist Insulation Supplies Ltd
Block B,
Woodgates Farm
Woodgates End
Dunmow, Essex
Tel: 01279 871159
Fax: 01279 871163
01279 871159
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