THERM-A-GAP™ gap-filler sheets and pads offer excellent thermal properties and highest conformability at low clamping forces.

Features/Benefits
  • Ultra low deflection force
  • High thermal conductivity
  • High tack surface reduces contact resistance
  • "A" version offers high strength acrylic PSA for permanent attachment
  • UL recognized V-0 flammability
  • RoHS compliant
All products are available on aluminum foil (A) or on "clean break" glass (G) fiber carrier. As with all previous Chomerics gapfillers, the "A" versions have a high strength acrylic pressure sensitive adhesive (PSA) for permanent attachment to the cold surfaces.
Unit of Measure
Items
THERM-A-GAP - Thermally Conductive Gap Filler Pads

THERM-A-GAP™ - Thermally Conductive Gap Filler Pads

THERM-A-GAP - Thermally Conductive Gap Filler Pads

THERM-A-GAP™ - Thermally Conductive Gap Filler Pads

THERM-A-GAP - Thermally Conductive Gap Filler Pads

THERM-A-GAP™ - Thermally Conductive Gap Filler Pads

THERM-A-GAP - Thermally Conductive Gap Filler Pads

THERM-A-GAP™ - Thermally Conductive Gap Filler Pads

THERM-A-GAP - Thermally Conductive Gap Filler Pads

THERM-A-GAP™ - Thermally Conductive Gap Filler Pads
Test Method Color N/A Visual
Color N/A Orange N/A Gray N/A Blue N/A Pink N/A Yellow
Carrier N/A Aluminum foil - with PSA Woven glass - no PSA
Test Method Thicknesses N/A ASTM D374
Standard Thickness1 N/A 0.25–5.0 mm0.010–0.200 in N/A 0.25–5.0 mm0.010–0.200 in N/A 0.5–5.0 mm0.020–0.200 in N/A 0.25–5.0 mm0.010–0.200 in N/A 0.5–5.0 mm0.020–0.200 in
Test Method Specific Gravity N/A ASTM D792
Specific Gravity N/A 2.0 N/A 2.2 N/A 2.2 N/A 2.9 N/A 2.9
Test Method Hardness N/A ASTM D2240
Hardness, Shore 00 N/A 4 N/A 10 N/A 25 N/A 30 N/A 45
Test Method Extractable Silicone N/A Chomerics
Extractable Silicone N/A N/A 10 % N/A 10 % N/A 6 % N/A 6 %
Test Method Percent Deflection at Various Pressures N/A ASTM C165 MOD (0.125 in “G” Type, 0.50 in dia. probe, 0.025 in/min rate)
Percent Deflection at Various Pressures (0.125 in) at 34 kPa (5 psi) Deflected N/A 26 % N/A 20 % N/A 10 % N/A 22 % N/A 7 %
Percent Deflection at Various Pressures (0.125 in) at 69 kPa (10 psi) Deflected N/A 36 % N/A 30 % N/A 15 % N/A 33 % N/A 10 %
Percent Deflection at Various Pressures (0.125 in) at 172 kPa (25 psi) Deflected N/A 59 % N/A 50 % N/A 25 % N/A 55 % N/A 20 %
Percent Deflection at Various Pressures (0.125 in) at 345 kPa (50 psi) Deflected N/A 73 % N/A 35 % N/A 35 % N/A 68 % N/A 30 %
Operating Temperature Range N/A –55 to 200 ºC–67 to 392 ºF
Test Method Thermal Impedance N/A ASTM D5470
Thermal Impedance at 10 psi, at 1mm Thickness, G Version N/A 9.7 ºC-cm²/W1.5 ºC-in²/W N/A 9.1 ºC-cm²/W1.4 ºC-in²/W N/A 9.1 ºC-cm²/W1.4 ºC-in²/W N/A 4.5 ºC-cm²/W0.7 ºC-in²/W N/A 4.5 ºC-cm²/W0.7 ºC-in²/W
Test Method Thermal Conductivity N/A ASTM D5470
Thermal Conductivity N/A 1 W/m·K N/A 1.5 W/m·K N/A 1.5 W/m·K N/A 3 W/m·K N/A 3 W/m·K
Test Method Heat Capacity N/A ASTM E1269
Heat Capacity N/A 1 J/g-K
Test Method Coefficient of Thermal Expansion N/A ASTM E831
Coefficient of Thermal Expansion N/A N/A 250 ppm/K N/A 250 ppm/K N/A 150 ppm/K N/A 150 ppm/K
Test Method Dielectric Strength N/A ASTM D149
Dielectric Strength N/A 8 KVac/mm200 Vac/mil
Test Method Volume Resistivity N/A ASTM D257
Volume Resistivity N/A 1014 O/cm
Test Method Dielectric Constant N/A ASTM D150
Dielectric Constant at 1000 kHz N/A 5.3 N/A 6.5 N/A 6.5 N/A 8.0 N/A 8.0
Test Method Dissipation Factor N/A Chomerics Test
Dissipation Factor at 1000 kHz N/A 0.013 N/A 0.013 N/A 0.013 N/A 0.010 N/A 0.010
Conformability Rating N/A N/A 1 N/A N/A 1 N/A
Test Method Flammability Rating N/A UL 94
Flammability Rating N/A Not tested N/A V-0 N/A V-0 N/A V-0 N/A V-0
Test Method RoHS Compliant N/A Chomeric Certification
RoHS Compliant N/A Yes
Test Method Outgassing N/A ASTM E595
Outgassing TML N/A 0.44 % N/A 0.42 % N/A 0.35 % N/A 0.19 % N/A 0.18 %
Outgassing CVCM N/A 0.13 % N/A 0.08 % N/A 0.09 % N/A 0.06 % N/A 0.05 %
Test Method Shelf Life N/A Chomerics
Shelf Life, Months from Date of Shipment G N/A 24
Shelf Life, Months from Date of Shipment A N/A 18
  • 1 Thickness tolerance, mm(in.) ±10 % nominal thickness at 2.5 mm (100 mil) or less; ± 0.25 mm (10 mil) at nominal thickness greater than 2.5 mm (100 mil). Custom thicknesses may be available upon request.