Offering a unique blend of high performance properties, Master Bond MasterSil 153 is often used in a variety of bonding and sealing applications involving optical, electrical, aerospace and medical devices. As an addition cured system, it does not require air for complete cross-linking. It can be cured over wide surface areas as well. This two component silicone features easy handling with a one to one mix ratio by weight and its paste consistency allows for precise application. 

MasterSil 153 has a low exotherm and long working life of 5 to 7 hours at room temperature. It is a self priming system, which enhances its bonding abilities to a wide variety of similar and dissimilar substrates, including most metals, plastics, glass, ceramic and cured silicone rubber. This translucent silicone is also serviceable over the wide temperature  range of -65°F to over 400°F. MasterSil 153 offers exceptional flexibility that enables it to withstand severe thermal cycling as well as vibration and mechanical shock. Its softer durometer of 20-35 Shore A hardness improves its repairability. This formulation has other noteworthy properties such as excellent electrical insulation capabilities, superior water resistance and very low shrinkage upon cure. If stored in its original containers, MasterSil 153 has a shelf life of 6 months. It is available in a variety of packaging sizes including ½ pint, pint, quart, gallon and five gallon container kits.