Glass Wool Roll & Blanket

Glass wool roll and blanket is a flexible fiber insulation used for AC ducting, false ceilings and combined thermal and acoustic insulation. It is made from fine glass fibers bonded into a resilient mat, which traps air to slow heat flow and gives a sound absorption coefficient (NRC) of 0.85 to 0.95. It is supplied plain or with foil (FRK) or fabric facings, so the same material can serve both duct wrap and ceiling applications.

Glass wool roll and blanket is rated from -10°C to +230°C, which covers both chilled and warm air ducts. The upper limit is set by the binder and glass fibers, so it is not intended for high-temperature process equipment. For hotter surfaces, Rockwool LRB Roll or Ceramic Fiber Blanket & Board is the usual alternative from this catalogue.

Glass wool roll is available in 25, 50, 75 and 100 mm thicknesses and densities of 16 to 48 kg/m³, in 1.2 m wide rolls of variable length. Lower densities are typical for ceiling and light duct wrap, while higher densities give better resilience and acoustic performance. On chilled ducts, thickness is set to prevent condensation; the heat-loss calculator on this site helps check surface temperature.

Use Glass Wool Roll & Blanket for AC ducting, ceilings and acoustic work up to +230°C, and Rockwool LRB Roll for hotter piping, tanks and equipment. Glass wool is lighter and suits HVAC and building services. Rock wool is made from stone fibers and is chosen where the surface temperature exceeds the glass wool rating or where higher density industrial insulation is needed.

Yes, glass wool roll and blanket is non-combustible and classified Class A1. The fibers themselves do not burn, which makes the material suitable for ducts and ceiling voids where fire behavior matters. Facings such as foil or fabric can influence the classification of the finished product, so if your specification names a fire rating for a faced roll, state it in your enquiry.

On AC ducts, glass wool is wrapped around the duct with a foil (FRK) facing outward, and all joints are sealed with Aluminum Foil Tape to form a continuous vapor barrier. On chilled ducts this barrier is essential, because any gap lets moist air condense inside the insulation. Pins, adhesive such as Contact Adhesive, or bands hold the blanket in place on larger ducts.

Glass wool roll and blanket conforms to ASTM C553, EN 13162 and IS 8183. ASTM C553 covers mineral fiber blanket insulation for commercial and industrial use, EN 13162 covers factory-made mineral wool products for buildings, and IS 8183 is the Indian specification for bonded mineral wool. Tell us which standard your project uses so it can be confirmed with your quotation.

Glass wool rolls and blankets are exported under HS code 70198000, the Indian tariff line for glass wool and articles of glass wool. The chapter 70 heading places it with glass products rather than plastics or mineral wool, which is a common point of confusion for importers. Your customs broker should confirm the national subheading and duty rate at the destination.

Glass wool rolls are shipped compressed and poly-wrapped, which reduces volume for sea freight and protects them from moisture. The rolls recover their thickness after unpacking, although storage should be dry and under cover. Quantities are usually counted in square meters at a given thickness and density, so state those, plus facing and destination port, in your enquiry.