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.

Product Information Bulletin (PIB) and Safety Data Sheet (MSDS) Downloads

PIB (PC2022AB)

SDS (PC2022A)
SDS (PC2022B)

PIB (Key PR1200 Primer)
SDS (Key PR1200 Primer)

(Typical Properties)
Physical Properties
Color, Part AOff White
Viscosityat 25°C, cP, Part A, (RVT #5, 20 RPM)4,500
Specific Gravityat 25°C, Part A1.35
Densityat 25°C, lbs/gal, Part A11.3
Color, Part BBlack
Viscosityat 25°C, cP, Part B,
(RVT #5, 20 RPM)
Specific Gravityat 25°C, Part B1.28
Densityat 25°C, lbs/gal, Part B10.7
Color, MixGrey / Black
Viscosityat 25°C, cP, Mix, (RVT #5, 20 RPM)11,000
Specific Gravityat 25°C, Mix1.31
Densityat 25°C, lbs/gal, Mix10.9
Mix Ratio by Volume1A to 2B
Mix Ratio by Weight53A to 100B
Gel Timeat 25°C, Minutes, 100 grams60
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/mil350
Volume Resistivity,25°C, Ohm-cm x (10)123.75
Dielectric Constant,25°C – 1 MHz5.00
Dielectric Constant,25°C – 1 kHz5.45
Dielectric Constant,
25°C – 60 Hz
Dissipation Factor, 25°C – 1 MHz0.021
Dissipation Factor, 25°C – 1 kHz0.034
Dissipation Factor, 25°C – 60 Hz0.089
Heat CapacityCp, 25°C, J/g°K1.42
Thermal Conductivity,25°C, W/m°K0.29
seechartCoefficient of Thermal Expansion, ppm/ °C
(-) 65°C to 75°C145
75°C to 100°C0
100°C to 150°C155
Coefficient of Thermal Expansion, ppm/°F
(-) 85°F to 167°F81
167°F to 212°F0
212°F to 302°F86
Hardness vs Temperature

(-75°C / -103°F)91 A
(-25°C / -13°F)78 A
5°C / 41°F70 A
25°C / 77°F68 A
50°C / 122°F66 A
66°C / 150°F69 A
80°C / 176°F68 A
100°C / 212°F64 A
120°C / 248°F54 A
150°C / 302°F53 A
Hardness vs Ambient Cure Time
seechart1 hour0 A
2 hours10 A
4 hours17 A
8 hours30 A
12 hours35 A
1 day48 A
2 day56 A
3 days61 A
4 days65 A
1 week65 A
1 month71 A
Mechanical Properties
Tensile Strengthper ASTM D638, 25°C, PSI550
Elongationper ASTM D638, Type I, 0.125 in, 25°C250%
Co=Cohesive Ad=Adhesive
Tensile Lap Shear Strengthper ASTM D1002, 25°C, psi **
metallicaAluminum Bare740 Co
Steel Bare480 Ad
Steel Ground600 Co
Primed Steel560 Co
Galvanized Steel700 Co
Tin Plated Steel600 Co
Chrome Plated Steel490 Co
Tensile Lap Shear Strengthper ASTM D3163, 25°C, psi **
frp_textFRP – Polyester Fiberglass460 Co
Garolite G-9 Melamine/Glass620 Co
Garolite G-10 Epoxy/Glass690 Co
Garolite XX Phenolic/Paper520 Co
Tensile Lap Shear Strengthper ASTM D3163, 25°C, psi **
Thermoplastics_textAcrylic620 Co
Acrylic/PVC600 Co
PVC – Polyvinyl Chloride570 Co
CPVC – Chlorinated PVC670 Co
ABS – Acylonitrile Butadiene Styrene580 Co
PETG – Polyethylene Terephthalate610 Co
Lexan – Polycarbonate630 Co
Nylon 6/6 – Polyamide620 Co
Polypropylene30 Ad
Polyethylene LDPE0 Ad
Polyethylene HDPE20 Ad
Teflon PTFE – Polytetrafluoroethylene10 Ad
Noryl – Polyphenylene Oxide/Polystyrene200 Ad
Ultem – Polyetherimide630 Co
**20 mil Bondline, 1 in x 4 in Adherands, 1 in Overlap