InsulBase is a rigid-roof insulation  
panel composed of a closed-cell  
polyisocyanurate foam core bonded 
on each side to glass-reinforced felt (GRF). ReadyFlash® Technology 
is a standard feature of InsulBase Polyiso that allows the contractor 
to manipulate flash-off times by choosing which side of the insulation 
board to apply membrane adhesives. ReadyFlash features a dark glass-
reinforced felt (GRF) on one side of the insulation board and a light glass-
reinforced felt on the other. 
» Increases surface temperature of the dark facer up to 25ºF above 
ambient temperature and provides up to 30% faster adhesive flash-off. 
» Decreases surface temperature of the light facer up to 5ºF below 
ambient temperature. 
Features and Benefits
» InsulBase polyiso insulation provides the highest R-value per inch of 
commercially available insulation products 
» Zero ozone-depleting components, HFC- and HCFC-free formulation
» Approved for direct application to steel decks 
Panel Characteristics
» Available in 4' x 4' (1220 mm x 1220 mm) and 4' x 8' (1220 mm x 
2440 mm) panels in thickness of ½" (13 mm) to 4.5" (115 mm)
» Available in 4' x 12' (1220 mm x 3660 mm) panels in the following 
thickness: 1.5", 1.75", 2.0", 2.2", 2.5", 2.6", 3.0", 3.3", and 3.5"
Applications
» Single-Ply Roof Systems (Ballasted, Mechanically Attached, 
Fully Adhered)

  Sustainable Attributes
Carlisle SynTec Systems’ focus has always been innovation – Innovation to 
solve problems, improve performance, reduce labor, and above all, improve 
sustainability. Carlisle is committed to driving sustainable and efficient 
processes in the design and manufacturing of our products.
» Zero ozone-depleting components, HFC- and HCFC-free formulation
» CDPH Compliant for maximum allowable concentrations of target VOCs 
» Up to 56.9% recycled content by weight (36.6% post-consumer/20.3% 
pre-consumer)
» Contributes to LEED® and Green Globes certification requirements
» End-of-life jobsite disposal options available for re-use/re-purposing 
» Carlisle Polyiso Roof Insulation and HD Cover Board EPDs available
» PIMA Quality MarkCM Certification Program participant for Long-Term 
Thermal R-values (LTTR)
» Highest R-value per inch providing maximum energy savings and CO2 
emissions avoidance 
Polyiso Eco Ready (Optional)
» 5% bio-content option available (for 2.0" and 2.6" thicknesses)
» Contributes to carbon reduction initiatives via mass balance approach 
under ISCC PLUS compliance