Glass cloth

Product Description

Glass cloth is a closed cell flexible elastomeric foam made from Nitrile Rubber factory laminated with 180 microns thick treated woven glass cloth. This material has low thermal conductivity and high water vapour diffusion resistance. It is CFC/HCFC free, dust and fiber free and ensures energy saving. This product meets insulation requirement in diverse fields such as the HVAC & R, Construction, Pharma, Hotel, Hospital, Process and Cold storage industries.


  • Resistance against UV and mechanical impact/ scratch
  • Suitable for harsh ambient conditions
  • Better aesthetics
  • Easy to install and handle
  • Available in 6 colors (black, blue, red, green, grey and white)
  • FM Approved


Insulation to prevent condensation, reduce energy losses and protection against mechanical damage on HVAC ducts, pipes, tanks & equipments.


Glass cloth can be used together with ALP Aeroflex adhesives (Aerostick) for a complete insulation system.

Product Range

Available in plain and self-adhesive rolls (sheets) in 9, 13, 16, 19, 25, 32 mm thickness of 1000 mm wide rolls

Technical Details

Thermal Conductivity W/m.K ≤ 0.035 W/m°K @10°C; ≤ 0.036 W/m°K @20°C ≤ 0.037 W/m°K @30°C; ≤ 0.038 W/m°K @40°C ASTM-C-518
Water vapour diffusion resistance factor (µ) ≥ 11000  
Cell Structure Closed Cell  
Laminate Treated glass cloth  
Density 40 to 60 Kg/M3  
Temperature Range* -40°C to + 105°C  
Ecological Data No asbestos, No HCFC - CFC, No Formaldehyde - Cd-Hg etc.  
Ozone Resistance Very Good  
Odour Negligible  
Reaction to Fire    
a) Fire performance acc. to building regulation Class 0 Bs476 Part 6
b) Surface flame spread Class 1 Bs476 Part 7 : 1997
c) Fire Propagation I<12 & i1<6 Bs476 Part 6 : 1989
d) Rate of burning (Vertical Position) Class V-0 UL 94 : 1997
e) Practical fire behavior Self-Extinguishing, does not drip and does not spread flames ASTM D 635-18
FM Approval   Approved