Insulating paste

An insulating paste comprising:

• an elastomer composition comprising silica particles (C) surface treated with a coupling agent (D);
• and
• a solvent,
• wherein the silane coupling agent (D) includes a silane coupling agent having a hydrophobic group and a silane coupling agent having a vinyl group,
• wherein a content of the silica particles (C) is equal to or more than 5% by mass and equal to or less than 45% by mass with respect to an entire insulating paste, and
• wherein the insulating paste has a viscosity of equal to or more than 1 Pa·s and equal to or less than 100 Pas at room temperature (25° C.).