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Tough-Seal Performs

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 Tough-Seal is an ideal material for the electronic encapsulation of sensitive electrical components that are subject to thermal cycling stress:

  • Tough-Seal bonds exceptionally well to the walls of most plastic and metallic housings, frames and shells and stays firmly in place without pull back during environmental exposure.
  • For connectors, Tough-Seal adheres and seals to wire insulation and metal contacts and receptacles.
  • It is soft enough to deliver a resilient and durable potting but its firm enough to lock down receptacles so that they are not prone to push back upon plug insertion.
  • Tough-Seal also makes a useful glob-top encapsulant to protect vulnerable microelectronic components from environmental, mechanical & electrical damage.

Tough-Seal Superiority

If you use urethane encapsulants, we can extend your service temperature and rid your facility of isocyanates.

If you use silicones, Tough-Seal offers a cost effective, non-silicone option with a friendly ratio and faster cure.

If you use epoxy encapsulation, Tough-Seal is an upgrade technology that can set quick, withstand the temperature yet offer imperceptibly low shrinkage upon cure, low embedment stress, and outstanding thermal cycling performance to solve your rigidity woes.

Is Tough-Seal right for your application? To find out, call Key now or simply click to get a kit and see for yourself.

Tough-Seal Properties

The physical, electrical, thermal and mechanical properties of all the Tough-Seal’s are compiled below for straight forward comparison between the grades. These values are typical measurements and are provided as guidance to specifying engineers. These values are not intended to be specifications.

Prefer to discuss your specific application with Tough-Seal Tech Service?
Call 1-888-KEY-POLY or Email: tough-seal@keypolymer.com


   
Harder Slower Less
Flow
Harder Slower Less
Flow
Softer Faster More
Flow
Softer Slower More
Flow
  Physical Properties
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31
32
  Color, Part A Off White Off White Off White Off White
  Viscosity at 25°C, cP, Part A, (RVT #5, 20 RPM) 7,000 4,500 3,500 4,500
  Specific Gravity at 25°C, Part A 1.32 1.35 1.15 1.15
  Density at 25°C, lbs/gal, Part A 11.0 11.3 9.6 9.6
  Color, Part B Black Black Black Black
  Viscosity at 25°C, cP, Part B, (RVT #5, 20 RPM) 11,000 11,000 7,000 7,000
  Specific Gravity at 25°C, Part B 1.28 1.28 1.02 1.02
  Density at 25°C, lbs/gal, Part B 10.7 10.7 8.5 8.5
  Color, Mix Grey / Black Grey / Black Grey / Black Grey / Black
  Viscosity at 25°C, cP, Mix, (RVT #5, 20 RPM) 10,000 11,000 5,000 6,000
  Specific Gravity at 25°C, Mix 1.29 1.31 1.07 1.07
  Density at 25°C, lbs/gal, Mix 10.8 10.9 8.9 8.9
  Mix Ratio by Volume 1A to 2B 1A to 2B 1A to 2B 1A to 2B
  Mix Ratio by Weight 51A to 100B 53A to 100B 57A to 100B 57A to 100B
  Gel Time at 25°C, Minutes, 100 grams 10 60 10 60
  Shelf Life, Ambient, Part A Bulk (15°C to 35°C) 3 Months 12 Months 3 Months 12 Months
 

Shelf Life, Ambient, Part B Bulk (15°C to 35°C)

12 Months 12 Months 12 Months 12 Months
  Shelf Life, Cold, Part A Bulk (-18°C to 3°C) 12 Months 12 Months 12 Months 12 Months
  Shelf Life, Cold, Part B Bulk (-18°C to 3°C) 12 Months 12 Months 12 Months 12 Months
  Electrical & Thermal Properties
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  Dielectric Strength, 25°C, Volts/mil 350 350 325 350
  Volume Resistivity, 25°C, Ohm-cm x (10)12 1.20 3.75 2.10 1.75
  Dielectric Constant, 25°C - 1 MHz 5.00 5.00 4.75 4.85
  Dielectric Constant, 25°C - 1 kHz 5.50 5.45 5.20 5.25
  Dielectric Constant, 25°C - 60 Hz 5.75 5.85 5.35 5.45
  Dissipation Factor, 25°C - 1 MHz 0.026 0.021 0.024 0.025
  Dissipation Factor, 25°C - 1 kHz 0.028 0.034 0.021 0.021
  Dissipation Factor, 25°C - 60 Hz 0.064 0.089 0.044 0.043
  Heat Capacity Cp, 25°C, J/g°K 1.37 1.42 1.75 1.80
  Thermal Conductivity, 25°C, W/m°K 0.26 0.29 0.18 0.20
Coefficient of Thermal Expansion, ppm/ °C        
(-) 65°C to 75°C 135 145 168 200
75°C to 100°C 0 0 168 200
100°C to 150°C 75 155 168 200
Coefficient of Thermal Expansion, ppm/°F        
(-) 85°F to 167°F 75 81 93 111
167°F to 212°F 0 0 93 111
212°F to 302°F 42 86 93 111
  Hardness vs Temperature
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(-75°C / -103°F) 88 A 91 A 87 A 84 A
(-25°C / -13°F) 75 A 78 A 50 A 48 A
5°C / 41°F 69 A 70 A 44 A 43 A
25°C / 77°F 64 A 68 A 37 A 40 A
50°C / 122°F 62 A 66 A 37 A 41 A
66°C / 150°F 61 A 69 A 37 A 42 A
80°C / 176°F 62 A 68 A 37 A 42 A
100°C / 212°F 57 A 64 A 37 A 42 A
120°C / 248°F 51 A 54 A 35 A 41 A
150°C / 302°F 47 A 53 A 33 A 39 A
  Hardness vs Ambient Cure Time
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1 hour 15 A 0 A 4 A 0 A
2 hours 26 A 10 A 6 A 0 A
4 hours 31 A 17 A 11 A 0 A
8 hours 35 A 30 A 14 A 0 A
12 hours 35 A 35 A 14 A 0 A
1 day 39 A 48 A 16 A 9 A
2 day 46 A 56 A 19 A 23 A
3 days 52 A 61 A 22 A 28 A
4 days 57 A 65 A 23 A 31 A
1 week 60 A 65 A 30 A 35 A
1 month 68 A 71 A 41 A 43 A
  Mechanical Properties
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  Tensile Strength per ASTM D638, 25°C, PSI 450 550 800 850
  Elongation per ASTM D638, Type I, 0.125 in, 25°C 225% 250% 400% 450%
    Co=Cohesive Ad=Adhesive
Tensile Lap Shear Strength per ASTM D1002, 25°C, psi  **
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Metalics Aluminum Bare 540 Co 740 Co 470 Co 480 Co
Steel Bare 530 Ad 480 Ad 260 Ad 200 Ad
Steel Ground 480 Co 600 Co 280 Ad 200 Ad
Primed Steel 530 Co 560 Co 150 Ad 200 Ad
Galvanized Steel 560 Co 700 Co 260 Ad 200 Ad
Tin Plated Steel 470 Co 600 Co 250 Co 200 Co
Chrome Plated Steel 560 Co 490 Co 250 Co 200 Co
           
Tensile Lap Shear Strength per ASTM D3163, 25°C, psi  **
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FRP FRP - Polyester Fiberglass 540 Co 460 Co 180 Ad 210 Ad
Garolite G-9 Melamine/Glass 530 Co 620 Co 130 Ad 220 Ad
Garolite G-10 Epoxy/Glass 550 Co 690 Co 130 Ad 360 Ad
Garolite XX Phenolic/Paper 570 Co 520 Co 190 Ad 160 Ad
           
Tensile Lap Shear Strength per ASTM D3163, 25°C, psi  **
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Thermoplastics Acrylic 560 Co 620 Co 110 Ad 300 Ad
Acrylic/PVC 430 Co 600 Co 120 Ad 250 Ad
PVC - Polyvinyl Chloride 530 Co 570 Co 150 Ad 250 Ad
CPVC - Chlorinated PVC 660 Co 670 Co 170 Ad 280 Ad
ABS - Acylonitrile Butadiene Styrene 500 Co 580 Co 120 Ad 180 Ad
PETG - Polyethylene Terephthalate 610 Co 610 Co 100 Ad 220 Ad
Lexan - Polycarbonate 520 Co 630 Co 90 Ad 210 Ad
Nylon 6/6 - Polyamide 520 Co 620 Co 160 Ad 260 Ad
Polypropylene 50 Ad 30 Ad 40 Ad 40 Ad
Polyethylene LDPE 20 Ad 0 Ad 10 Ad 10 Ad
Polyethylene HDPE 40 Ad 20 Ad 40 Ad 20 Ad
Teflon PTFE - Polytetrafluoroethylene 40 Ad 10 Ad 20 Ad 20 Ad
Noryl - Polyphenylene Oxide/Polystyrene 220 Ad 200 Ad 170 Ad 150 Ad
Ultem - Polyetherimide 540 Co 630 Co 100 Ad 170 Ad
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  **20 mil Bondline, 1 in x 4 in Adherands, 1 in Overlap        
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