Product Selector | MasterBond.com

Product	Certifications	Applications	Viscosity	Cure Schedule	Hardness	Temp. Range	Link to Content
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	/fr/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	/fr/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	/fr/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	/fr/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	/fr/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	/fr/tds/mastersil-323s-lo
MasterSil 415 One component silicone elastomer adhesive for high performance bonding and sealing Dielectric Strength 500 volts/mil Elongation 350-450%	RoHS Compliant	Bonding Sealing Coating Gap Filling	paste	12-24 hours at 75°F	25-35 Shore A	-185°F to +400°F	/fr/tds/mastersil-415
MasterSil 705 One component, silicone elastomer adhesive for high performance bonding and sealing Dielectric Constant 2.5 Elongation 300-400%	RoHS Compliant	Bonding Sealing Coating Gasketing	paste	Cures at 75°F	25-35 Shore A	-75°F to +450°F	/fr/tds/mastersil-705
MasterSil 705S One component, non-corrosive silicone for bonding and sealing Elongation 50% Volume Resistivity <0.01 ohm-cm	RoHS Compliant	Bonding Sealing Coating Gasketing	paste	Tack-free time, 75°F for 15-20 minutes	70 Shore A	-60°F to +400°F	/fr/tds/mastersil-705s
MasterSil 705TC One component, non-corrosive silicone for bonding, sealing & coating Dielectric Constant 4.2 Elongation 70%	RoHS Compliant	Bonding Sealing Coating Gasketing	paste	Tack-free time, 75°F 7 minutes	70-80 Shore A	-60°F to +400°F	/fr/tds/mastersil-705tc

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