Sikatherm® OPTIM-R

Sikatherm® OPTIM-R

Sika Sarnafil Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

High performance minimum thickness insulation system.

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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® OPTIM-R can be adhered or loose laid.


Sikatherm® OPTIM-R is an insulation system consisting of a rubber crumb protection mat, a vacuum insulation panel (Sikatherm® OPTIM-R) and a rigid polyisocyanurate insulation overlay board (Sikatherm® PIR GT).

Features and benefits:

  • Minimal thickness.
  • Complies with BS 476-3, CEN‐TS 1187‐4 and EN 13501‐5(4), subject to construction.

Compatible products include Sarnafil G410 range, SikaRoof® Primer 600UK or Sika® Primer 610 Spray to prepare the substrate, and bond Sarnavap 5000E SA vapour control layer. Each layer of Optim‐R is then bonded in turn using SikaRoof® Adhesive-200 or Sika® C-250 Spray adhesive.

General information




Various (subject to Sikatherm® OPTIM-R design).

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).

Cross section

Uniform thickness.

Thickness (nominal)

Install thermal insulation to achieve the required ‘U’ value defined by the Specifier.

Face size (length x width)

Various (subject to Sikatherm® OPTIM-R design).

300 x 300 mm.

400 x 300 mm.

600 x 400 mm.

600 x 600 mm.

1200 x 300 mm.

1200 x 400 mm.

1200 x 600 mm.


180—210 kg/m³.

Compressive strength at 10% deformation

>150 kPa.





Product Reference

Sikatherm® OPTIM-R


Sikatherm® OPTIM-R & Sikatherm® PIR GT overlay.

Sikatherm® OPTIM-R & Tapered Sikatherm® PIR GT overlay.

Third party certifications

  • BDA Agrément: BAE 15-035/01/C

Similar products from Sika Sarnafil

Sikatherm® PIR AL

Sikatherm® PIR GT

Sikatherm® PIR GT HD RK1

Sikatherm® PIR GT HD RK1