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SarnaTherm Optim-R is an insulation system consisting of a rubber crumb mat (R3), a vacuum insulation panel (Optim-R VIP Panel) and a rigid thermoset insulation (SarnaTherm G). Suitable for insulation within a Sarnafil roofing system where minimum thickness is required.

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, Primer 600 to prepare the substrate, and bond Sarnavap 5000E SA vapour control layer. Each layer of Optim‐R is then bonded in turn using Sarnacol 2162uk adhesive.

General information
Specification data - Polyisocyanurate (PIR) foam boards
Product Reference

SarnaTherm OPTIM-R

VIP panel -

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


20 mm

25 mm

30 mm

40 mm

50 mm

60 mm

Can be supplied as a double layer.

70 mm

Can be supplied as a double layer.

80 mm

Can be supplied as a double layer.

Standard product features

Technical characteristics:

  • Rubber crumb size: 1000 x 1000 mm.
  • Rubber crumb thickness: 3 mm.
  • SarnaTherm G size: 600 x 1200 mm.
  • SarnaTherm G thickness: Typically 25 mm as standard, but may vary subject to required U-value.
  • Form: Rubber crumb mat (R3) – Black. VIP Panel: Silver foil-wrapped. SarnaTherm G: Beige.
  • Application temperature: 5–30°C.

Third party certifications
  • BDA Agrément: BAE 15-035/01/C
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