Product Selector | MasterBond.com

Product	Certifications	Applications	Viscosity	Cure Schedule	Hardness	Temp. Range	Link to Content
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
MasterSil 323Med Black Two component, medical grade silicone for bonding and sealing Dielectric Strength 450 volts/mil Elongation 150-250%	ISO 10993-5 for Cytotoxicity RoHS Compliant	Bonding Sealing Encapsulation Coating Gap Filling	Part A: 15,000-30,000 cps, Part B: 10,000-25,000 cps	cures at ambient temperatures in 48-72 hours or in 2-4 hours at 135-165°F; optimum cure is 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-black
MasterSil 323S-LO Two part, silver filled, low outgassing silicone for bonding, sealing and coating Elongation 50-100% Volume Resistivity <0.003 ohm-cm	NASA Low Outgassing RoHS Compliant	Bonding Sealing Coating Gap Filling	Part A: paste, Part B: paste	8-12 hours at 130-150°F, 4-6 hours at 160-180°F or 2-3 hours at 190-210°F	35-55 Shore A	-80°F to +400°F	/tds/mastersil-323s-lo

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