Flexible heater pads are produced by sandwiching wire elements or etched foil between two layers of Fenner's flexible heater pad material. Glass fabric reinforced heater pad material is the primary product offered for flexible heater pads, however Kevlar™ and polyester reinforcements are available on request.
Unsupported silicone sheet is used to encapsulate heavy wires and is also used in the attachment of terminal block connection points.
UL listed grades and low-smoke, low-toxicity grades are available.
Part Number Terminology
| Example: |
GL16 SUC 04/04 S94 |
| GL16 |
Fenner Precision fabric designation |
| SUC |
Uncured one side, cured coating the other side |
| DUC |
Uncured coating both sides |
| CC |
Cured coating both sides |
| 04/04 |
Coating thickness on each side of the fabric in 0.001" |
| S94 |
Fenner Precision silicone designation |
Available Dimension Ranges
| Supported |
50 to 100 |
600 to 910 |
0.45 to 1.5 |
| Unsupported |
30 to 50 |
600 to 900 |
0.5 to 1.5 |
Standard Glass Fabric Reinforced Flexible Heater Pad Material Specification Ranges
Standard Fabrics
| GL16 |
Woven Glass |
0.008" (0.2mm) |
500°C |
| GL300 |
Woven Glass |
0.011" (0.28mm) |
500°C |
| GL921 |
Woven Glass |
0.013" (0.33mm) |
500°C |
Standard Silicones
| S4Wa |
No external approvals |
70° IRHD |
-50°C |
150°C |
Yes |
Red |
| S65 |
BS 6853 Category 1a |
70° IRHD |
-50°C |
150°C |
Yes |
Blue |
| S94 |
UL94 V0 |
60° Shore A |
-50°C |
150°C |
Yes |
Violet |
| S400 |
UL94 V1 |
65° Shore A |
-50°C |
150°C |
Yes |
Red |
| S746 |
UL94 HB |
65° Shore A |
-50°C |
230°C |
Yes |
Red |
UL File No. E219584
UL Approved Glass Fabric Reinforced Silicone Sheet Material
Specification UL 94-VO
Specification UL94-V1
Specification UL Recognized High-Temperature Grade
Low Toxicity Grade Glass Fabric Reinforced Silicone Sheet Material - Conforms to BS 6853 Vehicle Category 1a.
Standard Glass Reinforced Silicone Pads
Standard Unreinforced Silicone Sheet
