Product Selector | MasterBond.com

Product	Certifications	Applications	Viscosity	Cure Schedule	Hardness	Temp. Range	Link to Content
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
MasterSil 153AOMed Two part medical grade, thermally conductive, electrically insulating silicone for bonding and sealing Dielectric Strength 450 volts/mil Elongation 100-120%	ISO 10993-5 for Cytotoxicity RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: 200,000-550,000 cps, Part B: 100,000-500,000 cps	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-153aomed
MasterSil 153Med Two component, addition cured medical grade silicone for bonding and sealing Dielectric Strength 450 volts/mil Elongation 400-500%	ISO 10993-5 for Cytotoxicity RoHS Compliant USP Class VI Medical	Bonding Sealing Coating Gap Filling	Part A: 150,000-300,000 cps, Part B: 50,000-250,000 cps	75°F: 48-72 hours	20-35 Shore A	-65°F to +400°F	/tds/mastersil-153med
MasterSil 153Med Black Two component, paste consistency, addition cured medical grade silicone for bonding and sealing Dielectric Strength 450 volts/mil Elongation 400-500%	ISO 10993-5 for Cytotoxicity RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: 150,000-300,000 cps, Part B: 50,000-250,000 cps	75°F: 48-72 hours; 200°F: 2-3 hours; Optimum cure: Overnight at 75°F followed by 1 hour at 150-200°F	20-35 Shore A	-65°F to +400°F	/tds/mastersil-153med-black
MasterSil 155 Two part, graphite filled silicone for high performance bonding, sealing and coating Elongation 300-400% Volume Resistivity 20-40 ohm-cm	RoHS Compliant	Bonding Sealing Coating Gap Filling	paste	75°F: 6-7 days; 150°F: 2-4 hours; Optimum cure schedule: overnight at 75°F followed by 2-4 hours at 150°F	35-45 Shore A	-85°F to +400°F	/tds/mastersil-155
MasterSil 157 Two component, addition curing silicone for potting, encapsulation and sealing Dielectric Strength 450 volts/mil Refractive Index 1.43	RoHS Compliant	Bonding Sealing Encapsulation Potting Coating Gap Filling	Part A: 5,500-6,000 cps, Part B: 100-300 cps	12-24 hours at 75°F, followed by 3-5 hours at 150-200°F	35-45 Shore A	-175°F to +500°F	/tds/mastersil-157
MasterSil 170 Gel Two component, addition curing silicone gel for sealing, potting and encapsulation Dielectric Strength 500 volts/mil Refractive Index 1.42	RoHS Compliant	Encapsulation Potting Bonding Sealing Coating Gap Filling	1,000 cps	24-48 hours at ambient temperatures, or in 1-2 hours at 150-170°F	65 mm penetration	-67°F to +392°F	/tds/mastersil-170-gel
MasterSil 323 Two component, addition cured silicone for bonding, sealing, and small encapsulations Elongation 150-250% Refractive Index 1.44	RoHS Compliant	Bonding Sealing Encapsulation Coating Gap Filling Potting	Part A: 15,000-30,000 cps, Part B: 10,000-25,000 cps	48-72 hours at 75°F or 2-4 hours at 135-165°F	35-45 Shore A	-65°F to +400°F	/tds/mastersil-323
MasterSil 323Med Two component, medical grade silicone for bonding and sealing Acoustical Impedance 1.1 MRayl Elongation 150-250%	RoHS Compliant ISO 10993-5 for Cytotoxicity	Bonding Sealing Encapsulation Potting Gap Filling	Part A: 15,000-30,000 cps, Part B: 10,000-25,000 cps	75°F: 48-72 hours; 135-165°F: 2-4 hours; Optimal cure: Overnight at 75°F followed by 2-4 hours at 135-165°F	35-45 Shore A	-65°F to +400°F	/tds/mastersil-323med

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