Henkel Loctite 3873 is a self-shimming, thermally conductive adhesive. When used with Activator 7387, it cures rapidly to form a high strength, high modulus, thermoset acrylic polymer. A uniform bondline thickness of 0.127 mm results from the incorporation of solid glass spheres. Recommended applications include the bonding of various heat generating devices (power devices) to thermal spreaders. LOCTITE® 3873 is a light gray, opaque, thixotropic, self-shimming, thermally conductive, liquid acrylic ester adhesive. When used with LOCTITE Activator 7387, its rapid cure forms a high strength, high modulus, thermoset acrylic polymer. Recommended applications include the bonding of various heat generating devices (power devices) to thermal spreaders.