Bergquist sil pad 400 thermally conductive insulating material bergquist sp400 0007 00 43 bergquist sil pad 400 dry to 220 no hole pack of 10 is designed to replace grease and mica for power applications and is ideal for reducing assembly time and maintaining cleanliness in production environments consists of a glass fibre sheet coated with a thermally conductive silicon elastomer bergquist sp400 0007 00 43 sil pad 400 dry to220 no hole pack of 10