Master Bond EP42HT-4AOMed Black is a two-part epoxy created for medical device manufacturing. It is reportedly biocompatible and non-cytotoxic, passing both USP Class VI and ISO 10993-5 certifications. The company reports that this epoxy withstands aggressive chemical sterilants, radiation, and repeated cycles of autoclaving. 

EP42HT-4AOMed Black reportedly offers both cryogenic serviceability and heat resistance with a service temperature range from 4K to 400°F. Its thermal conductivity measures 9-10 BTU•in/(ft2•hr•°F), and its volume resistivity is greater than 1014 ohm-cm. The system contains a filler, which contributes to its high strength profile and dimensional stability. This adhesive bonds well to metals, composites, glass, ceramics, rubbers, and plastics. It features a tensile modulus of 500,000-550,000 psi, a compressive strength of 24,000-26,000 psi, and a tensile strength of 7,000-8,000 psi. 

The company reports that the epoxy can cure at room temperature; faster cures can be achieved by heat curing. In order to obtain optimal properties, an overnight cure at room temperature followed by heat curing at 150-200°F for 2-3 hrs is recommended. The mix ratio is 100 to 40 by weight. Once mixed, this versatile adhesive has very good flow properties, making it suitable for bonding, sealing, and coating applications. Upon curing, EP42HT-4AOMed Black exhibits very low shrinkage and low exotherm; it can be used for castings up to 2-3 in. thick.

The opaque black epoxy is available in the following size kits: ½ pint, pint, quart, and gallon. It is also available in pre-mixed and frozen syringes, which are compatible with automated dispensing equipment.

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