Carlisle SynTec SecurShield Grade-II 20 psi Polyiso Roof Insulation Panel, 2 in. x 4 ft. x 8 ft. - image 1

Carlisle SynTec SecurShield Grade-II 20 psi Polyiso Roof Insulation Panel, 2 in. x 4 ft. x 8 ft.

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Carlisle SynTec SecurShield Grade-II 20 psi Polyiso Roof Insulation Panel, 2 in. x 4 ft. x 8 ft.


This is a 2 in. thick, 4 ft. x 8 ft. Carlisle SynTec SecurShield Grade-II (20 psi) rigid polyisocyanurate roof insulation panel, sold as one piece. Its closed-cell polyiso core is bonded to premium coated-glass facers featuring ReadyFlash Technology for controlled adhesive flash-off. Use it under Carlisle SynTec single-ply membranes with compatible adhesives or attachment systems.


Key Features:

  • ReadyFlash Technology: A dark coated-glass facer on one side and a light facer on the other let contractors control membrane adhesive flash-off time by board orientation.
  • 20 psi Compressive Strength: This Grade-II panel is rated for 20 psi compressive resistance, per the item specification.
  • High R-Value per Inch: Polyiso delivers the highest R-value per inch of commercially available roof insulation, per the manufacturer's data sheet.
  • Premium Facers: Premium performance coated-glass facers improve fire resistance, moisture resistance and dimensional stability.
  • Wind Uplift Performance: The superior facer-to-foam core bond enhances wind-uplift performance.
  • Code Approvals: Complies with ASTM C1289-11 Type II Class 2, IBC Section 2603, UL 790/263/1256, FM 4450/4470, Florida Building Code and California Title 24.
  • Sustainable Formulation: HFC- and HCFC-free with zero ozone-depleting components, CDPH compliant and a PIMA Quality Mark participant.

Specifications Table:

Specification Details
Brand Carlisle SynTec
Sell unit 1 panel, 4 ft x 8 ft x 2 in.
Product line SecurShield Polyiso with ReadyFlash Technology
Material Closed-cell polyisocyanurate foam core with coated-glass facers (CGF)
Dimensions 4 ft x 8 ft, 2 in. thick
Thickness 2 in
Grade / compressive strength Grade-II (20 psi)
Coverage per unit 32 sq ft per panel
Approvals ASTM C1289-11 Type II Class 2; IBC Section 2603; UL 790, 263, 1256; FM 4450/4470; CAN/ULC S704 Type 2 & 3 Class 2; Florida Building Code Approved; UL Classified; PIMA Quality Mark; California Title 24; LEED
Weight 15.04 lb per panel
Facer Dark CGF on one side, light CGF on the other (ReadyFlash)
Intended use Rigid roof insulation under single-ply membrane roofing

Coverage & How Much You Need:

One 4 ft. x 8 ft. panel covers 32 sq ft of roof deck. Divide total roof area by 32 to estimate panel count, allowing for layout cuts and perimeters.

Fit and Compatibility:

Designed for use under Carlisle SynTec single-ply roofing membranes with Carlisle membrane adhesives; the ReadyFlash facers let you control adhesive flash-off time. Membrane, adhesives, fasteners and cover board are sold separately.


Frequently Asked Questions (FAQ):

Q: What is included in the order?
A: One 2 in. thick, 4 ft. x 8 ft. SecurShield Grade-II (20 psi) polyiso insulation panel; membrane and adhesives are sold separately.


Q: How many panels do I need?
A: Each panel covers 32 sq ft, so divide your roof area by 32 and add a waste allowance for cuts and perimeter fit.


Q: What does ReadyFlash Technology do?
A: Each panel has a dark facer on one side and a light facer on the other; applying adhesive to the dark side speeds flash-off (up to 2x on cool days, up to 4x on warm days) while the light side slows it.


Q: What standards does this panel meet?
A: It is listed to ASTM C1289-11 Type II Class 2, IBC Section 2603, UL 790/263/1256, FM 4450/4470, CAN/ULC S704, Florida Building Code and California Title 24.


Q: How is it installed?
A: Install per Carlisle's roofing system specifications and local code, typically adhered or mechanically attached to the deck with membrane-approved adhesives or fasteners and plates.


Q: What is the compressive strength?
A: This Grade-II panel is rated at 20 psi compressive strength.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

At 2 in. thick, this SecurShield panel balances R-value per inch with a manageable board weight of about 15 lb, making it a workhorse thickness for single-ply re-roofs and tear-offs. Orient the dark ReadyFlash facer toward the membrane on cool days to accelerate adhesive flash-off, and use the light facer when conditions call for more open time. Stagger board joints between layers and follow the membrane manufacturer's fastening pattern for the specified wind-uplift rating.

Follow OSHA roof-work fall-protection requirements and install per Carlisle's specifications and local building code.


Order the Carlisle SynTec SecurShield 2 in. 4x8 Grade-II polyiso panel today for high-R-value roof insulation.

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