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Metal adhesives

Master Bond MasterSil 922-LO Silicone
Categories: Polymer; Adhesive; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade

Material Notes: Key Features:
  • Meets NASA ASTM E595
  • Neutral type cure
  • Paste consistency
  • Excellent performance profile
Product Description: MasterSil 922-LO is a specially blended RTV silicone system that is primarily used for bonding, sealing and coating. First and foremost, this non-corrosive, neutral type curing system fully passes NASA low outgassing test requirements. It bonds very well to a wide variety of substrates, including metals, composites, ceramics, glass as well as many rubbers and plastics. Its paste like consistency is especially convenient for bonding and sealing applications. MasterSil 922-LO can withstand highly aggressive thermal cycling and shock requirements. Similar to other one part silicones, the curing mechanism is based on the humidity level; the higher it is, the faster the cure. In conjunction with that, thinner sections cure more quickly than thicker ones. When cured in thicker sections, it is translucent. However in thinner sections, such as when bonding glass to itself, it has marvelous transparency and light transmission. Another advantage of MasterSil 922-LO is its exceptionally wide service temperature range of -175°F to +500°F; surpassing most conventional RTVs, both with negative and positive temperature limits. This remarkable silicone can be used in aerospace, electronic, specialty OEM and related applications, where a low outgassing, non-flow one part system is the best fit. Please note that in order to achieve the low outgassing properties, a seven day cure at room temperature is recommended.

Information provided by Master Bond Inc.

Vendors: Master Bond is a leading manufacturer of adhesives, sealants, coatings and potting compounds. Master Bond’s vast product line consists of over 3,000 epoxy, polyurethane, silicone, cyanoacrylate and latex adhesives that vary in viscosity, cure speed, strength, chemical resistance, electrical properties, etc. Our custom adhesives offer design flexibility and provide excellent bonding performance. Visit www.masterbond.com.

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Physical PropertiesMetricEnglishComments
Specific Gravity 1.10 g/cc1.10 g/cc
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 40 - 5040 - 50
Tensile Strength 4.48 - 5.17 MPa650 - 750 psi
Elongation at Break 250 - 350 %250 - 350 %
Tensile Modulus 1.38 - 2.07 GPa200 - 300 ksi
Adhesive Bond Strength 2.07 - 2.76 MPa300 - 400 psiTensile Lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+15 ohm-cm>= 1.00e+15 ohm-cm
Dielectric Constant 3.1
@Frequency 60 Hz
3.1
@Frequency 60 Hz
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 260 °C500 °F
Minimum Service Temperature, Air -115 °C-175 °F
 
Processing PropertiesMetricEnglishComments
Cure Time 10100 min168 hour
Tack-Free Time 30.0 - 40.0 min0.500 - 0.667 hour
Working Life 5.00 - 10.0 min5.00 - 10.0 min
Shelf Life 6.00 Month
@Temperature <=23.9 °C
6.00 Month
@Temperature <=75.0 °F
in original, unopened containers
 
Descriptive Properties
ColorTranslucent, optically clear in thin sections
Viscositypaste

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PMASTM942 / 185535

Metal adhesives

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