Sealing & coating silicone meets NASA requirements
Passing ASTM E595 testing for NASA low outgassing, MasterSil 920-LO is a high performance, room temperature vulcanising silicone for sealing, coating and small encapsulations. Introduced by Master Bond, this single component system has a moderate, flowable viscosity and a solid electrical profile, which makes it suited for conformal coating applications in the electronic and optical industries.
Featuring a soft durometer of 25-35 Shore A, this low stress silicone can protect sensitive electronic components.
As a one part system, MasterSil 920-LO offers convenient handling with no mixing and has a neutral non-corrosive cure. Similar to other one component silicones, the curing mechanism is based on humidity, where the higher it is, the faster the cure. Its tack free time ranges from 45-60 minutes. MasterSil 920-LO bonds very well to a wide variety of substrates including metals, glass, plastics and rubber materials. With its inherent flexibility, the compound can withstand rigorous thermal cycling and shock. It is also optically clear and has a refractive index of 1.43.
It is serviceable over a temperature range from -175 to +500°F and has a six month shelf life in its original, unopened packaging at room temperature. MasterSil 920-LO is available in syringes, 100g bottles, 200g bottles and pint containers.
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