SARCON® SPG-30B Highly Thermal Conductive, Electricity Insulative, Low Viscosity type Silicone Compound


Sarcon SPG-30B is highly conformable / thermally conductive, low viscosity and easier dispensable type silicone compound. It provides a thermal solution for the recent trends of higher frequencies and integration in the development of electronic devices. Sarcon SPG-30B easily forms and adheres to most of surfaces, shapes, and sizes of components. Sarcon SPG-30B makes complete and reliable physical contact with the component and opposing surfaces. It provides handling properties that are superior to thermal grease & potting materials.
1) Suitable for filling the delicate gaps and still provide superior thermal transfer.
2) Highly conformable with very low compression forces.
3) Has excellent vibration absorption capabilities.
4) Maintains thermal properties across a wide temperature range.
5) Can be used to “Form-In-Place” and will remain form stable.
6) Requires no heat curing.
7) Will not cause corrosion on any metal surface.

Material CodeConstruction
Sarcon SPG-30BHigh Viscosity type
Silicone compound
SARCON® SPG-30B Recommended Application
Typical Material Properties
ItemUnitSPG-30BTest method
Specific Gravity-3.2JIS K 6220/(ASTM D792)
ViscosityPa・s2,600Fujipoly test method *1
Thermal ConductivityW/m・K3.1Fujipoly test method *2
50 Hz -14.6 JIS K 6911:2006/ ASTM  D 150
1k Hz14.3
1M Hz14.4
50 Hz -1.2 x 10-2
1k Hz3.6×10-3
1M Hz2.8×10-3
Volume ResistivityMΩ・m6.9×105JIS K 6249 / ASTM  D257

*1: Accurate Rotary Viscometer (RV1) Shearing Speed:1.0 (1/S), Gap:0.5mm
*2: Hot Disk method tester (TPA-501) Based on ASTM D2326 equivalent.

Typical Product Properties

Thermal resistance under Heat, Cold, Humid and Thermal Shock conditions

+70℃ Aging120℃ Aging
GapsInitial100 hrs250 hrs500 hrs1,000 hrsGapsInitial100 hrs250 hrs500 hrs1,000 hrs
+150℃ Aging-40℃ Aging
GapsInitial100 hrs250 hrs500 hrs1,000 hrsGapsInitial100 hrs250 hrs500 hrs1,000 hrs
+60℃ 95%RH Aging-40℃⇔+125℃ Heat Shock
GapsInitial100 hrs250 hrs500 hrs1,000 hrsGapsInitial100 hrs250 hrs500 hrs1,000 hrs

Remark: *Unit of Thermal Resistance: ℃・cm2/W based on ASTM D5470 equivalent method
*Contact Surface: 3.14 cm2, (0.49 inch2)

*Filled material’s weight: 1.0 g for 1.0 mm gap

Oil Separation

+125℃ Aging

+125℃ Aging



100 h

250 h

500 h

1,000 h







Remark: *Unit of Oil Separation : wt% *ASTM D5470 equivalent method
Statement of Lieu of Warranty

• Properties of the products may be revised due to some changes for improving performance.
• Properties values in this document are not specification or guaranteed.
• This product is made of silicone, and silicone oil may exude from the product.
• This product is made of silicone, and low molecular siloxane may vaporize depending on operating conditions.
• The product is designed, developed, and manufactured for general industrial use only. Never use for medical, surgical, and/or relating purposes. Never use for the purpose of implantation and/or other purposes by which apart of or whole product remains in human body.
• Before using, a safety must be evaluated and verified by the purchaser.
• Contents described in the document do not guarantee the performances and qualities required for the purchaser’s specific purposes. The purchaser is responsible for pre-testing the product under the purchaser’s specific.
• Statements concerning possible or suggested uses made herein may not be relied upon, or be constructed, as a guaranty of no patent infringement.

Handling Notes

• It is recommended to use the material in up to 30% of compression ratio. Using the material beyond the recommended compression rate may result in excessive silicone oil exudation.
• It is recommended to compress the material with the equal ratio on the whole surface. Partial excessive stress may also result in excessive silicone oil exudation.

Fujipoly: Thermal Interface Materials
ISO 9001:2015