In automotive electronics, home appliance controllers, and intelligent devices, the contactor induction switch is the core induction and triggering unit. Its working environment is often accompanied by moisture, vibration, dust, and cold and hot cycles, which impose strict requirements on the protection of internal circuits.
In order to further enhance the stability, durability, and protective performance of products, more and more manufacturers are adopting the “local encapsulation inside the shell” scheme to achieve long-term sealing protection of sensitive circuit boards (PCBs) and sensing areas.
Today, we introduce to you a widely used and highly stable fast curing epoxy adhesive in the industry – EP 2005 fast curing epoxy adhesive
It is particularly suitable for this scenario:
✔ PA66+30% fiberglass shell
✔ Partial sealing protection
✔ Waterproof and moisture-proof
✔ Rapid solidification and improved production efficiency
1、 Application background: Why does the contactor induction switch need local sealing?
Induction switches are responsible for real-time response to external actions, and their internal circuits include components such as coils, capacitors, resistors, PCBs, etc. Once exposed to moisture, dust, or chemical media, it will cause:
Trigger malfunction
Output drift and misoperation
Decreased electrical performance
Metal contact oxidation
Significant decline in lifespan
Therefore, manufacturers generally adopt local sealing technology to provide:
Sealing protection
Avoid water vapor intrusion and improve equipment lifespan.
Mechanical protection
Absorb vibrations and prevent solder joints from cracking.
Electrical insulation
Reduce risks such as short circuits and electrical leakage.
Adapt to cold and hot cycling environments
-Environmental stress between 40 ℃ and 85 ℃ will not cause material cracking.
Choosing the appropriate sealant is crucial among these requirements.
2、 EP 2005 Fast Curing Epoxy Adhesive – A Professional Adhesive Suitable for Rapid Sealing
EP 2005 is a two-component fast curing epoxy adhesive that combines adhesion, sealing, and protection. It is specifically developed for application scenarios that require “fast assembly+high-strength protection”, and is particularly suitable for internal sealing of intelligent automotive induction switches, micro switches, and sensors.
Product advantages and highlights:
- Fast curing, efficient production
Mixing ratio: A: B=1:1 (weight or volume ratio)
It can cure and form in 10-15 minutes
No heating required → More suitable for automatic dispensing operations on assembly lines - Excellent adhesion to engineering plastics such as PA66 and fiberglass
Compatible with PA66+30% GF
Compared to metals, ceramics PCB、 Outstanding adhesive properties of rubber and other materials - High strength structural fixation, resistant to mechanical stress
After curing, the material has high strength and good toughness, and can resist daily vibration and long-term fatigue. - Excellent environmental tolerance
Working temperature: -45 ℃~120 ℃
Moisture resistance, pollution resistance, and corrosion resistance
No solvents, no curing by-products, more environmentally friendly and stable - Good electrical insulation performance
Used to protect electrical circuits from short circuits, leakage, and moisture damage.
3、 Application advantages: How to improve the reliability of induction switches?
✔ Compact local sealing structure
Does not affect the overall assembly space.
✔ Establish a reliable seal in the contact area
Even if exposed to low temperature, high humidity, and dust in the car cabin for a long time, it can maintain stability.
✔ Ensure longer product lifespan
Suitable for mass manufacturing and long-life automotive grade applications.
✔ Compatible with automated dispensing equipment
Colloid flow is stable, without drawing or collapsing, and does not cause glue leakage/shortage problems.
4、 Typical application scenarios
Car hood switch
Door touch sensing switch
Luggage sensing module
Micro motion sensing device inside smart home appliances
Lightweight structural fixation and sealing
Application scenarios of sensor sealing adhesive
Application scenarios of sensor sealing adhesive
5、 Conclusion: EP 2005 provides reliable protection for inductive switches
In the era of increasingly small and powerful automotive electronics, the requirements for “stability” and “environmental resistance” of contactor induction switches are unprecedentedly high.
EP 2005 fast curing epoxy adhesive relies on:
rapid curing
high-intensity
Excellent adhesion force
Electrical insulation
Moisture resistant and stain resistant
Friendly to PA66+GF material
Become the preferred material solution in this field.
If you are looking for efficient, stable, and mass-produced local potting adhesive, EP 2005 would be a very suitable product.
Tags: Fast curing epoxy potting adhesive · Contactor induction switch local potting · Contact induction switch potting · potting adhesive · Epoxy potting adhesive
