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ArmaFlex Shield

Pre-jacketed flexible insulation with a tough moisture- and UV-resistant coating that stands up to extreme elements in outdoor applications.

Technical information ArmaFlex Shield
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Brief description

  • ArmaFlex Shield consists of an ArmaFlex insulation core with a flexible, factory-applied polymeric protective covering designed to prevent damage to the insulation from sunlight., installation, and physical abuse. --Available in continuous lengths or 6 foot lengths.
PropertyValue / AssessmentStandard / Test method
Temperature range
Service temperature1,2,3
Min. °CMin. °F1Max. °CMax. °F
-183-29782220
ASTM C534
Thermal conductivity
1 - Declared thermal conductivity W/(m·K)
Θm75 °F100 °F
λd ≤ [W/(m·K)]0.0360.037
k ≤ [Btu-in/(h-ft2-°F)]0.250.257
R-Value for tubes4
ID / Wall thickness1/2" (13mm)3/4" (19mm)1" (25mm)
1/4" (6 mm)3.86.4---
3/8" (10 mm)3.35.9---
1/2" (13 mm)3.35.57.2
5/8" (16 mm)3.35.57.2
3/4" (19 mm)3.35.57.0
7/8" (22 mm)3.35.47.0
1-1/8" (29 mm)3.35.4---
UL standards
UL94 5VAPass at 1/4" (6 mm) thickness and aboveUL94 5VA
UL94 HF-1Pass at 1/4" (6 mm) thickness and aboveUL 94 HF-1
UL94 V-0Pass at 1/4" (6 mm) thickness and aboveUL94 V-0
Resistance to water vapour
Water vapor permeability0.03 Perm-in
(0.435 x 10⁻¹³) Kg/(s m Pa)
ASTM E96, procedure A, Meets Class 1 rating
Resistance to water
Water absorption0.2%
Weather and UV resistance
UV resistance5Excellent: no deteriorationASTM G1546
Resistance to ozoneGoodASTM D1149
Outdoor useArmaFlex Shield meets the requirements of the International Energy Conservation Code (IECC) for the protection of insulation installed outdoors. Its durable, outer covering resists damage due to sunlight and other outdoor
hazards including line trimmers used for lawn maintenance. 5-year limited warranty. No field applied protective coating or additional jacketing required.

1At -40 °F (-40 °C), the insulation becomes brittle. This hardening characteristic does not affect thermal efficiency or water vapor permeability.

2For temperatures below -40 °F(-40 °C), please contact our Customer Service Center.

3ArmaFlex Shield insulation can withstand temperatures as high as 250 °F (121 °C) when tested according to ASTM C411.

4Please refer to Technical Bulletin #1.

5ArmaFlex Shield meets the UV resistance requirements of ASTM C1775 which describes requirements for insulation protective jacketing used outdoors.

6Tested for 5000 hours.