Technical Data
February 2013
3M
™
Thermally Conductive Grease TCG-2035 / TCG-2031
Product Description
3M™ Thermally Conductive Grease TCG-2035 is an ultra-high performance thermal interface material for transferring
thermal energy from a heat source (e.g.: processor chip, graphics chip, etc.) to a heat sinking or heat spreading surface.
The 3M Grease TCG-2035’s blend of inorganic fillers in a non-silicone resin system provides for excellent bulk thermal
conductivity along with very low thermal resistance.
3M™ Thermally Conductive Grease TCG-2031 has a lower viscosity versus the 3M™ Thermally Conductive Grease
TCG-2035 as a small amount of solvent has been blended into the product. The lower viscosity of the 3M Grease
TCG-2031 can allow for a thinner bond line leading to improved thermal resistance and is also designed for use in
screen printing applications.
Key Features
• High Performance thermal interface material.
• Superior bulk conductivity.
• Excellent thermal impedance.
• Non-silicone based formulation.
• < 40 µ max particle diameter.
• 3M Grease TCG-2031 is screen printable.
Typical Physical Properties
Note:
The following technical information and data should be considered representative or typical only and should not be
used for specification purposes.
G* = 5400 Pa @ 25°C (*1425 Pa)
g*
= 74 Pa-sec @ 25°C (*20 Pa-sec)
Dielectric Constant = 5.4 @ 1kHz
Dielectric Breakdown Strength = 4700 Volts/mm
*Information
relates to the 3M Grease TCG-2031.
G’ = 3150 Pa @ 25°C (*800 Pa)
d
= 2.92 g/cm
3
(*2.81)
Vol Resistivity = 1.36 x 10
9
Ω-cm
@ 1 kHz
3
3M
™
Thermally Conductive Grease TCG-2035 / TCG-2031
Typical Performance Characteristics
Note:
The following technical information and data should be considered representative or typical only and should not be
used for specification purposes.
k = 4.1 W/m-K
Thermal Impedance: 0.012 C-in
2
/W (0.081 C-cm
2
/W) (Thermal Impedance measured with a modified 3M ASTM-D5470 Test Method)
Operating Temperature Range*
3M Test Method
Long Term (Weeks-Months)
Short Term (Hours-Days)
100 to 125°C
125 to 150°C
*Note:
The end use customer application, design & verification testing will determine the final in use effective temperature range based on each
application’s environmental conditions.
Storage and Shelf Life
Product Shelf life is 9 months from date of manufacture when stored in the original product container and packaging
materials and stored at room temperature (18-24°C) and 50% RH.
To ensure best uniformity of conductive fillers, the product should be mixed prior to use to ensure uniform distribution of
fillers.
Directions for Use
Apply the product at the desired interface and use pressure (from approximately 1-25 psi applied at a variable or constant
force as determined by end user) when bringing the substrate interfaces together. Pressure is applied until the desired gap
thickness is achieved. Apply sufficient product to ensure good gap filling at the desired final nominal gap thickness
(Sufficient product volume use can be demonstrated by having a small amount of squeeze-out at the edges of the interface).
Heat can be applied (40-50°C) to lower the product viscosity to aid in product flow and for establishing a desired gap
thickness.
The 3M™ Thermally Conductive Grease TCG-2031 product contains a small amount of solvent to lower viscosity and
allow for screen printing. Screen print to a desired surface and allow product to rest open faced for 2-10 minutes at room
temperature to allow solvent to evaporate prior to assembly. Review MSDS for detailed use information.
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3M
™
Thermally Conductive Grease TCG-2035 / TCG-2031
Regulatory
For regulatory information about this product, refer to our website at 3M.com.
For Additional Information
To request additional product information or to arrange for sales assistance, call toll free 1-800-251-8634. Address
correspondence to: 3M, Electronics Markets Materials Division, 3M Center, Building 225-3S-06, St. Paul, MN 55144-
1000. Our fax number is 651-778-4244 or 1-877-369-2923. In Canada, phone: 1-800-364-3577. In Puerto Rico, phone:
1-787-750-3000. In Mexico, phone: 52-70-04-00.
Technical Information
The technical information, recommendations and other statements contained in this document are based upon tests or
experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.
Product Use
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and performance
of a 3M product in a particular application. Given the variety of factors that can affect the use and performance of a 3M
product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose
and suitable for user’s method of application.
Warranty, Limited Remedy, and Disclaimer
Unless an additional warranty is specifically stated on the applicable 3M product packaging or product literature,
3M warrants that each 3M product meets the applicable 3M product specification at the time 3M ships the product.
3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF
DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and
exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price.
Limitation of Liability
Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether
direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract,
negligence or strict liability.
These products are not warranted or guaranteed to be silicone-free.
3
Electronics Markets Materials Division
3M Center, Building 225-3S-06
St. Paul, MN 55144-1000
1-800-251-8634 phone
651-778-4244 fax
www.3M.com/electronics
3M is a trademark of 3M Company.
Please recycle. Printed in U.S.A.
© 3M 2013. All rights reserved.
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