Two-component room temperature curing MasterSil 151 Med is a medical grade, potting and encapsulation silicone formulated to withstand such exposures. It has a low viscosity of 1,500 cps. Its volume resistivity is 1×1015 ohm cm and it can handle a temperature range of -65° F to +400° F.
It cures optically clear with a refractive index of 1.43. Shrinkage upon cure is less than 0.1%. When cured, it has a Shore A hardness of 45 and an elongation at break of 160%. Even though it has such high elasticity, its tensile strength is still a favorable 880 psi at 73° F. Mix ratio is 10 to 1 by weight. It fully meets USP Class VI requirements for medical applications.
MASTER BOND INC.