Product Specifications: PC2022AB


Tough-Seal 22 is a tough and durable longer working time Potting Compound and Sealant with excellent Thermal Cycling Stability. This medium viscosity material is self-leveling and flows like honey around electrical components to ensure complete coverage of your entire PCB or electronic assembly.


Tough-Seal 22 has a longer 60 minute working time and a Shore Hardness of 68A, which is similar to the hardness of a car tire. Tough-Seal 22 reaches 94% of its full hardness after an overnight cure or with a heat cure of 1 hour at 80°C  (176°F). Tough-Seal does not exotherm or shrink during curing, therefore there is no embedment stress induced on the electronic components that could cause damage and failure of the PCB or electronic assemblies. Sensitive electronics can be potted safely with low embedment stress Tough-Seal.


With a high elongation of 225%  when fully cured, Tough-Seal 22 maintains exceptional flexibility and thermal cycling stability from –40°C  to 150°C (-40°F to 302°F) without pulling back, wilting, or cracking.  This ensures a tough seal that will stop moisture or other contaminants from damaging sensitive PCB’s and electronics.


Tough-Seal has very aggressive adhesion to aluminum, making it a perfect choice for potting aluminum housings especially in LED lighting applications.  Tough-seal bonds extremely well with most polymers.  For housing and wire insulation materials that are exceptionally difficult to bond to, we offer our KEY PR1200 PRIMER, an aggressive adhesive promoter that is simple to use.

Technical Data Sheet (TDS) and Safety Data Sheet (MSDS) Downloads

TDS (PC2022AB)

SDS (PC2022A)
SDS (PC2022B)

TDS (Key PR1200 Primer)
SDS (Key PR1200 Primer)

(Typical Properties)
Physical Properties
Color, Part A Off White
Viscosityat 25°C, cP, Part A, (RVT #5, 20 RPM) 4,500
Specific Gravityat 25°C, Part A 1.35
Densityat 25°C, lbs/gal, Part A 11.3
Color, Part B Black
Viscosityat 25°C, cP, Part B,
(RVT #5, 20 RPM)
Specific Gravityat 25°C, Part B 1.28
Densityat 25°C, lbs/gal, Part B 10.7
Color, Mix Grey / Black
Viscosityat 25°C, cP, Mix, (RVT #5, 20 RPM) 11,000
Specific Gravityat 25°C, Mix 1.31
Densityat 25°C, lbs/gal, Mix 10.9
Mix Ratio by Volume 1A to 2B
Mix Ratio by Weight 53A to 100B
Gel Timeat 25°C, Minutes, 100 grams 60
Shelf Life, Ambient, Part A Bulk (15°C to 35°C) 12 Months
Shelf Life, Ambient, Part B Bulk (15°C to 35°C) 12 Months
Shelf Life, Cold, Part A Bulk (-18°C to 3°C) 12 Months
Shelf Life,Cold, Part B Bulk (-18°C to 3°C) 12 Months
Electrical & Thermal Properties
Dielectric Strength, 25°C, Volts/mil 350
Volume Resistivity,25°C, Ohm-cm x (10)12 3.75
Dielectric Constant,25°C – 1 MHz 5.00
Dielectric Constant,25°C – 1 kHz 5.45
Dielectric Constant,
25°C – 60 Hz
Dissipation Factor, 25°C – 1 MHz 0.021
Dissipation Factor, 25°C – 1 kHz 0.034
Dissipation Factor, 25°C – 60 Hz 0.089
Heat CapacityCp, 25°C, J/g°K 1.42
Thermal Conductivity,25°C, W/m°K 0.29
seechart Coefficient of Thermal Expansion, ppm/ °C
(-) 65°C to 75°C 145
75°C to 100°C 0
100°C to 150°C 155
Coefficient of Thermal Expansion, ppm/°F
(-) 85°F to 167°F 81
167°F to 212°F 0
212°F to 302°F 86
Hardness vs Temperature
seechart (-75°C / -103°F) 91 A
(-25°C / -13°F) 78 A
5°C / 41°F 70 A
25°C / 77°F 68 A
50°C / 122°F 66 A
66°C / 150°F 69 A
80°C / 176°F 68 A
100°C / 212°F 64 A
120°C / 248°F 54 A
150°C / 302°F 53 A
Hardness vs Ambient Cure Time
seechart 1 hour 0 A
2 hours 10 A
4 hours 17 A
8 hours 30 A
12 hours 35 A
1 day 48 A
2 day 56 A
3 days 61 A
4 days 65 A
1 week 65 A
1 month 71 A
Mechanical Properties
Tensile Strengthper ASTM D638, 25°C, PSI 550
Elongationper ASTM D638, Type I, 0.125 in, 25°C 250%
Co=Cohesive Ad=Adhesive
Tensile Lap Shear Strengthper ASTM D1002, 25°C, psi **
metallica Aluminum Bare 740 Co
Steel Bare 480 Ad
Steel Ground 600 Co
Primed Steel 560 Co
Galvanized Steel 700 Co
Tin Plated Steel 600 Co
Chrome Plated Steel 490 Co
Tensile Lap Shear Strengthper ASTM D3163, 25°C, psi **
frp_text FRP – Polyester Fiberglass 460 Co
Garolite G-9 Melamine/Glass 620 Co
Garolite G-10 Epoxy/Glass 690 Co
Garolite XX Phenolic/Paper 520 Co
Tensile Lap Shear Strengthper ASTM D3163, 25°C, psi **
Thermoplastics_text Acrylic 620 Co
Acrylic/PVC 600 Co
PVC – Polyvinyl Chloride 570 Co
CPVC – Chlorinated PVC 670 Co
ABS – Acylonitrile Butadiene Styrene 580 Co
PETG – Polyethylene Terephthalate 610 Co
Lexan – Polycarbonate 630 Co
Nylon 6/6 – Polyamide 620 Co
Polypropylene 30 Ad
Polyethylene LDPE 0 Ad
Polyethylene HDPE 20 Ad
Teflon PTFE – Polytetrafluoroethylene 10 Ad
Noryl – Polyphenylene Oxide/Polystyrene 200 Ad
Ultem – Polyetherimide 630 Co
**20 mil Bondline, 1 in x 4 in Adherands, 1 in Overlap