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Sikatherm® PIR GT HD RK1

Sikatherm® PIR GT HD RK1

Sika Sarnafil Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

High compressive tissue faced rigid polyisocyanurate (PIR) thermal insulation board.

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Refer to product data sheet for general requirements. Reference must be made to the Sika Sarnafil project specification for the correct product application. Sikatherm® PIR GT HD RK1 can be adhered, mechanically fixed or loose laid.


Sikatherm® PIR GT HD RK1 is a high compressive strength insulation cover board. It is faced on both sides with a coated glass tissue bonded to the core and produces a tough, durable, light weight product.

Sikatherm® PIR GT HD RK1 is to be installed in conjunction with Sikatherm® PIR GT/AL insulation boards.

Features and benefits:

  • High compressive strength.
  • Very low thermal conductivity.
  • CFC-/ HCFC-free with zero Ozone Depletion Potential (ODP).
  • Suitable for new construction and refurbishment.
  • No separation layer for membranes is required.
  • Low adhesive consumption.
  • High compression strength.
  • Supports excellent adhesion with appropriate Sarnacol range.
  • Lightweight and low load on the roofing structure.

General information


Glass tissue faced


Polyisocyanurate (PIR)




2400 x 1200 mm

Uniclass 2015

Pr_25_71_63_66 Polyisocyanurate (PIR) foam boardsPrimary


J42/10 Warm deck roof covering

J42/430 Warm deck roof insulation

Specification data - Polyisocyanurate (PIR) foam boards Enhanced data


To BS 4841-4.

Fire performance

Class E (EN 13501-1).

Thermal conductivity (maximum)

0.028 W/m²K.

Thickness (nominal)

15 mm.

Consult manufacturer for further sizes.

Face size (length x width)

2400 x 1200 mm.


32 kg/m³.

Compressive strength at 10% deformation

> 300 kPa.


Glass tissue, both sides.



Product Reference

Sikatherm® PIR GT HD RK1

Third party certifications

  • BDA Agrément: BAE 15-035/01/C

Similar products from Sika Sarnafil

Sikatherm® OPTIM-R

Sikatherm® OPTIM-R

Sikatherm® PIR AL

Sikatherm® PIR GT