Specifically designed for attaching heat sinks to ICs. Works better and is less messy than thermal glues or pastes because the thickness is even across the area. A perfect match for our range of small heat sinks, either in aluminum or copper.
Comes in a square of 25mm x 25mm (1" square) - but can be cut into any shape or size.
Adafruit Product Page: https://www.adafruit.com/products/1467