UV silicone dual-curing high elasticity sealant can replace rubber sealing rings
JM3302 is a single-component, low-viscosity self-leveling UV-curable silicone adhesive. When exposed to sufficient UV radiation, it rapidly cures or achieves initial surface curing, while deeper layers or unexposed areas continue to cure under moisture action, ultimately forming a flexible and resilient elastomer. This product exhibits moderate strength, low shrinkage, a low thermal expansion coefficient, and excellent high-temperature and high-humidity resistance.
product details
JM 3302 UV silicone dual-curing high elasticity sealant can replace rubber sealing rings
JM3302 is a single-component, low-viscosity self-leveling UV-curable silicone adhesive. When exposed to sufficient UV radiation, it rapidly cures or achieves initial surface curing, while deeper layers or unexposed areas continue to cure under moisture action, ultimately forming a flexible and resilient elastomer. This product exhibits moderate strength, low shrinkage, a low thermal expansion coefficient, and excellent high-temperature and high-humidity resistance. The JM3302 form-fitting coating cures within seconds under LED or broad-spectrum UV (UVA, UVB, and UVC) irradiation (preferably using a mercury vapor lamp [H-type] system), achieving non-viscous consistency and oxygen inhibition within less than 10 seconds at 300 mW/cm² illumination.
This product can be used for bonding various materials, particularly suitable for bonding metals, glass, and plastics.
application scenarios
PCB board three-proof coating
High-precision optical and photoelectric instrument bonding
Square lithium-ion battery with aluminum casing bonded with insulating protective material
Motor housing is sealed; gaps between the electronic water pump and oil pump are sealed.
Bonding of the LiDAR reflector cover
Physical properties (before curing) *
| Viscosity (mPa·s) | 3,000 — 5,000 |
| surface | Light yellow transparent liquid |
| Specific gravity (g/cm³) | 0.99-1.03 |
| storage time | 6 months |
service behavior
Recommended curing condition (mJ/cm²): 2000
Total complete deep curing time: 7 days
Light source specifications: 365 nm,LED lamp
Light intensity (mW/cm²): 70-100
Illumination time: 30–60 seconds
Hardness (A): 45-65
Tensile strength (MPa): >5
Fracture elongation,% ASTM D882: >80
Shear strength, Al-Al (MPa): 2.4
Shear strength, PC-PC (MPa): 4.0
Shear strength, glass-PBT (MPa): 1.9
Shear strength, glass-PA (MPa): 1.3
Shear strength, glass-ABS (MPa): 2.3
Shear strength, Al-Al (MPa): 2.0
Curing depth: >4 mm
Water absorption rate (24h,%): 0.80
Working temperature (°C): -55 to 200
Glass transition temperature Tg (°C): -56
Thermal expansion coefficient, α2, ppm, 320
behaviour of electricity
Dielectric constant (1 MHz): 2.93
Dielectric loss (1 MHz): 0.01
Dielectric strength (KV/mm): > 18
Insulation strength, 0.1 mm, kV: > 3
Volume resistivity (Ω·cm): > 3.5×10¹³
Surface resistivity (Ω): > 2.7×10¹²
packing specifications
Syringe packaging: 30ml per tube, 50ml per tube;
300ml per vial, 1kg per can, 5kg per can
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