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Product	Certifications	Applications	Viscosity	Cure Schedule	Hardness	Temp. Range	Link to Content
MasterSil 151AO Two part silicone for high performance casting, potting & encapsulation and sealing Coefficient of Thermal Expansion 120-150 X 10⁻⁶ in/in/°C Dielectric Strength 450 volts/mil	MIL-STD-810G for Fungus Resistance RoHS Compliant	Encapsulation Potting Sealing Coating Gap Filling Bonding Casting	Part A: 17,000-24,000 cps, Part B: 50-150 cps	48-72 hours at 75°F, 2-3 hours at 200°F	75-85 Shore A	-65°F to +400°F	/tds/mastersil-151ao
MasterSil 151Med Two component, biocompatible silicone compound for potting and encapsulation Acoustical Impedance 1.1 MRayl Refractive Index 1.43	ISO 10993-5 for Cytotoxicity RoHS Compliant USP Class VI Medical	Encapsulation Potting Sealing Coating Gap Filling Bonding Casting	Part A: 2,000-4,000 cps, Part B: 50-150 cps	75°F: 24-48 hours; 200°F: 1-2 hours	40-50 Shore A	-65°F to +400°F	/tds/mastersil-151med
MasterSil 152 Two component, condensation curing silicone for potting, encapsulation and sealing Dielectric Strength 450 volts/mil Refractive Index 1.435	RoHS Compliant	Sealing Encapsulation Potting Gap Filling	Part A: 500-900 cps, Part B: 50-150 cps	Curing is at 75°F only, with a full cure in 24-48 hours	25-35 Shore A	-65°F to +400°F	/tds/mastersil-152
MasterSil 153 Two component, addition cured silicone for bonding and sealing applications Dielectric Strength 450 volts/mil Elongation 400-500%	RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: 150,000-300,000 cps, Part B: 50,000-250,000 cps	At 75°F MasterSil 153 will cure in 48-72 hours. Faster cures can be realized at elevated temperatures, e.g. 2-3 hours at 200°F.	20-35 Shore A	-65°F to +400°F	/tds/mastersil-153
MasterSil 153AO Two part thermally conductive, electrically insulating silicone for bonding and sealing Dielectric Strength 450 volts/mil Elongation 100-120%	RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: 200,000-550,000 cps, Part B: 100,000-500,000 cps	Optimum cure is overnight at 75°F followed by 2-4 hours at 135°F to 185°F.	65-75 Shore A	-65°F to +400°F	/tds/mastersil-153ao
MasterSil 323AO-LO Two part thermally conductive, electrically insulating silicone for bonding and sealing Dielectric Constant 3.7 Dielectric Strength 450 volts/mil	NASA Low Outgassing RoHS Compliant	Bonding Sealing Gap Filling	300,000-400,000 cps	12-24 hours at 75°F, followed by 3-5 hours at 125°F to 175°F	70-75 Shore A	-65°F to +400°F	/tds/mastersil-323ao-lo
MasterSil 151 Two component, addition curing silicone for potting, encapsulation and sealing Dielectric Strength 450 volts/mil Refractive Index 1.436	RoHS Compliant 1,000 Hours at 85°C/85% RH	Sealing Encapsulation Potting Coating Gap Filling Bonding Casting	Part A: 2,000-4,000 cps, Part B: 50-150 cps	75°F 24-48 hours; 200°F 1-2 hours	50-60 Shore A	-65°F to +400°F	/tds/mastersil-151
MasterSil 151Med Black Two component, biocompatible silicone compound for bonding, potting and encapsulation Dielectric Strength 450 volts/mil Volume Resistivity 10¹⁴ ohm-cm	ISO 10993-5 for Cytotoxicity RoHS Compliant	Bonding Encapsulation Potting Coating Sealing Gap Filling Casting	Part A: 2,000-4,000 cps, Part B: 50-150 cps	75°F: 24-48 hours; 200°F: 1-2 hours	40-50 Shore A	-65°F to +400°F	/tds/mastersil-151med-black
MasterSil 151S Two part, silver filled, low outgassing silicone for bonding, sealing and coating Elongation 100-150% Volume Resistivity 0.004 ohm-cm	NASA Low Outgassing RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: paste, Part B: 50-150 cps	4-6 hours at 150 to 180°F and 2-3 hours at 190 to 210°F	80-90 Shore A	-80°F to +400°F	/tds/mastersil-151s
MasterSil 151TC Two part, room temperature curing, thermally conductive silicone with ultra fine particle filler for bonding and smaller gap filling Dielectric Strength 450 volts/mil Thermal Conductivity 4.0-5.8 BTU•in/(ft²•hr•°F)	NASA Low Outgassing RoHS Compliant	Bonding Gap Filling Sealing Coating Casting Potting Encapsulation	30,000-60,000 cps	Optimum cure is overnight at 75°F followed by 1-2 hours at 150-200°F.	80-90 Shore A	-65°F to +400°F	/tds/mastersil-151tc

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