K-FLEX ST is closed cell, flexible elastomeric foam use in thermal and acoustic applications. K-FLEX ST is a Factory Mutual Approved, Class “0” fire rating (based on BS476 Part 6 & 7), Anti-Microbial, Clean room approved insulation without CFCs, HCFs, HCFCs, Formaldehyde, Green Guard Approved, Singapore Green Mark Approved (GBI) and Fiber free. K-FLEX ST insulation is also available with pressure sensitive adhesive and aluminium foil for faster installation process.)


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K-FLEX ST is a multi purpose flexible elastomeric thermal insulation with a built-in vapour barrier and a closed cell structure, this make K-FLEX insulation a high resistance to water vapour transmission which in turn enable the material to maintain a high level of energy conservation efficiency.

K-FLEX ST is a dust and fibre free insulation that make it an ideal product for apartments, commercial buildings, industrial plants, oil & gas industry, marine and offshore applications.

K-FLEX ST is the ideal choice for:

  • Refrigeration pipework
  • Hot water piping system
  • Ducting system
  • Large pipe and tanks
  • Chilled water piping system
  • Drainage system

With 14 plants worldwide, K-FLEX can uniquely provide On-Time Delivery, Consistent Product Quality and a Highly Competitive Price.


Low flame spread

When fire tested K-FLEX ST, it does not generate flaming droplets, and has a low fire propagation index. These combined meet the fire performance requirement of class “0“ as defined in Building Regulations. Further guarantee is given by supervision contracts with independent laboratories.

High water vapour diffusion resistance

K-FLEX ST closed cell elastomeric insulation has a high water vapour diffusion resistance factor μ, that minimizes water vapour penetration, giving excellent long term performance.

Very low thermal conductivity

K-FLEX ST thermal conductivity is λ 0°C = 0.032W/(m·K). The thermal conductivity coefficient is the most important factor in calculation focused on energy saving.

Technical Data