In sealing scenarios for automotive electronics, motor control boxes, electric vehicle water pumps, industrial control modules and various electronic enclosures, the CIPG sealing process has gained growing popularity among manufacturers.
CIPG, short for Cured-In-Place Gasket, refers to in-situ cured gaskets. Continuous adhesive beads can be dispensed directly into housing sealing grooves via dispensing equipment and cured to form elastic sealing structures. It is ideal for complex housings, irregular sealing grooves, automated production lines and high-reliability sealing requirements.
For housing CIPG sealing, materials shall not only ensure good adhesion, but also maintain stable sealing performance under long-term compression, thermal cycling, vibration impact and harsh working conditions. ELAPLUS recommends SIPA 1820-1K one-component heat-curable silicone adhesive for such applications.
I. Why Choose SIPA 1820-1K for Housing CIPG Sealing
The core of housing CIPG sealing is to form stable, compressible, resilient and long-lasting elastic gaskets after adhesive curing.
Advantages of ELAPLUS SIPA 1820-1K
■ Compression set＜22%
■ One-component formula for easy operation
■ Heat curing for stable process control
■ Excellent aspect ratio performance
■ High compression deformation resistance
■ Perfect for automatic dispensing and sealing groove forming
Adhesive beads for motor control boxes, EV water pumps, plastic & aluminum plate sealing are always under sustained compression after assembly. Excessively high compression set will lead to insufficient resilience, sealing failure and ingress of water vapor and dust.
SIPA 1820-1K features outstanding elasticity retention, which maintains continuous sealing stress after housing assembly and greatly improves long-term sealing reliability.
II. Product Introduction of SIPA 1820-1K
ELAPLUS SIPA 1820-1K is a thixotropic paste-type one-component silicone adhesive adopting heat curing mechanism. It is eco-friendly, non-toxic and easy to apply. After curing, it forms flexible silicone elastomer with integrated functions of adhesion, sealing, cushioning and electrical insulation protection.
Specially developed for long-term thermally stable bonding of diverse substrates, it is applicable to: metals, glass, silicone rubber, plastics, mica sheets, ceramics, stainless steel, aluminum plates and electronic housing structural parts.
As a professional manufacturer of organic polymer adhesives, ELAPLUS provides one-stop solutions covering adhesive technology and production process optimization for electronics, automotive, new energy and other industries.
III. Core Performance Advantages
1. One-component Thixotropic Paste Suits Automatic Dispensing
No need to mix Part A and Part B, effectively avoiding proportion deviation, mixing bubbles and frequent equipment maintenance.
For CIPG process, single-component system boasts several distinct advantages:
■ Simpler operation
■ Stable dispensing effect
■ Ideal for mass automated production
■ Less manual error
■ Easy to control bead height and width
Its thixotropic property ensures smooth dispensing without sagging, shaping regular and stable adhesive cross-section for CIPG application.
2. Fast Heat Curing Boosts Production Efficiency
Matched with customer assembly cycle, it can be rapidly cured via oven, hot plate or heating fixture.
Compared with room temperature curing materials, heat curing materials are more conducive to:
■ Shorten curing cycle
■ Improve production line tact time
■ Ensure consistent batch performance
■ Facilitate standardized process parameters
■ Easy to integrate into automatic production lines
■ Heat-cured CIPG solution is highly suitable for mass production of motor control boxes, EV water pumps and electronic enclosure sealing.
3. Low Compression Set＜22% Ensures Long-term Sealing Reliability
Compression set is the most critical indicator for CIPG sealing. Poor resilience will cause gaps and external substance ingress.
With compression set lower than 22%, SIPA 1820-1K retains excellent elastic recovery under long-term compression, perfectly fitting high-reliability sealing demands:
■ CIPG sealing for motor control boxes
■ Sealing of electric vehicle water pumps
■ Automotive electronic enclosure sealing
■ Industrial control module sealing
■ Bonding & sealing between plastic shells and aluminum plates
■ Sealing and fixing around heating elements
4. Superior Aspect Ratio for Stable Bead Forming
The CIPG process has strict requirements on adhesive bead shape. Excessively saggy beads lead to insufficient sealing stress after compression, while overly high or uneven beads may impair assembly precision.
SIPA 1820-1K features excellent aspect ratio performance to form stable bead profiles. It improves dispensing uniformity and assembly stability for sealing applications such as housing grooves, enclosure edges and flange surfaces.
5. Outstanding Wide Temperature Resistance for Harsh Environments
The cured silicone elastomer keeps stable elasticity within -60℃ ~ +280℃, adapting to frequent thermal cycling and thermal shock in automotive and industrial electronic fields.
Typical applications:
■ EV water pump sealing
■ Motor control box sealing
■ Heating element bonding
■ Steam chamber sealing for electric irons
■ Electronic enclosure sealing under extreme temperatures.
6. Excellent Waterproofing, Shock Resistance & Electrical Insulation
Housing sealants shall feature not only water resistance, but also vibration resistance, electrical insulation and long-term environmental adaptability.
After curing, SIPA 1820-1K possesses the following properties:
Excellent waterproof performance
■ Good vibration damping performance
■ Reliable electrical insulation
■ Superior weather resistance
■ Good corona resistance
■ Leakage resistance
■ Ability to absorb thermal expansion and contraction
These properties are particularly critical for sealing applications in automotive electronics, motor control boxes, outdoor electronic modules and water pumps.
IV. Typical Application Scenarios
1. CIPG Sealing for Motor Control Boxes
Motor control boxes are commonly exposed to vibration, thermal cycling, moisture ingress and long-term harsh operating conditions.
SIPA 1820-1K can form continuous elastic sealing beads inside housing sealing grooves via CIPG process, effectively enhancing overall sealing reliability.
Keywords: Motor control box CIPG, CIPG sealant, enclosure CIPG, silicone sealant
2. Electric Vehicle Water Pump Sealing
Electric vehicle water pumps impose high requirements on sealing materials in terms of water resistance, moisture proofing, vibration resistance and temperature resistance.
SIPA 1820-1K is ideal for pump housing sealing, structural bonding and waterproof protection, effectively reducing leakage risks.
Keywords: EV water pump sealant, water pump CIPG sealing, silicone bonding & sealing adhesive3
3. Bonding between Plastic Housing and Aluminum Plate
Bonding and sealing between plastic shells and aluminum plates are widely used in automotive and industrial electronic structures.
Different materials have distinct coefficients of thermal expansion, which tend to cause thermal stress due to temperature changes. After curing, SIPA 1820-1K features excellent flexibility and tear resistance. It can buffer thermal expansion and contraction, and greatly improve the bonding reliability of dissimilar materials.
Keywords: Plastic-aluminum bonding adhesive, aluminum plate sealant, silicone adhesive for plastic enclosures
4. Electric Iron Steam Chamber Sealing
Bonding and sealing between plastic housings and aluminum plates are widely applied in automotive and industrial electronic structures.
Different materials have varied coefficients of thermal expansion, which easily generate thermal stress under temperature fluctuation. Cured SIPA 1820-1K features good flexibility and tear resistance, capable of absorbing thermal expansion and contraction to improve bonding reliability of dissimilar materials.
Keywords: Plastic-to-aluminum bonding adhesive, aluminum plate sealant, silicone adhesive for plastic enclosures
5. Heating Element Bonding
Materials around heating elements must withstand long-term high temperature while maintaining stable bonding and insulation performance.
SIPA 1820-1K is suitable for bonding and fixing heating elements, and maintains excellent stability under high-temperature conditions.
Keywords: Heating element bonding adhesive, high temperature resistant silicone adhesive, heat-curable silicone adhesive
V. Advantages of CIPG over Traditional Gaskets
Traditional rubber gaskets require mold opening, stock preparation and manual assembly, prone to offset and uneven compression on complex structures.
CIPG dispensing molding directly on housings brings prominent strengths:
■ Compatible with irregular sealing grooves
■ Cut down traditional gasket inventory cost
■ Higher automation level
■ Customizable bead profile
■ Flexible production for diversified products
■ Minimize manual assembly errors
■ Unified sealing effect of finished housings
It is the optimal choice for lightweight, integrated and automated automotive & industrial electronic products.
VI. Differences between SIPA 1820-1K and Ordinary Sealants
Conventional sealants only focus on basic bonding and gap filling, while qualified CIPG sealants must satisfy multiple requirements:
■ stable bead forming
■ elastic curing property
■ steady compression resilience
■ long-term anti-failure performance
■ wide temperature resistance
■ moisture resistance
■ vibration resistance
■ automatic dispensing adaptability
■ multi-substrate compatibility.
As a one-component thixotropic heat-curable silicone adhesive, SIPA 1820-1K balances easy operation, stable curing and long-term weather resistance, perfectly matching high-standard CIPG housing sealing projects.
VII. Key Selection Criteria for CIPG Sealing Adhesives
■ Compression set value
■ Adhesive bead aspect ratio
■ Thixotropy
■ Curing method & speed
■ Substrate adhesion strength
■ Temperature resistance range
■ Waterproof grade
■ Electrical insulation performance
■ Automatic dispensing adaptability
■ Environmental compliance standards
Prioritize one-component heat-curable silicone materials with low compression set and high elasticity for motor control boxes, EV water pumps and plastic-aluminum bonding sealing.
VIII. FAQ
Q1: What is the best adhesive for housing CIPG sealing?
A: Thixotropic silicone sealant with good resilience, wide temperature resistance, waterproofing, shock resistance and insulation is preferred. ELAPLUS SIPA 1820-1K one-component heat-curable silicone adhesive is ideal for CIPG sealing of motor control boxes, EV water pumps and plastic-aluminum assembly.
Q2: Why is SIPA 1820-1K suitable for CIPG process?
A: It features easy one-component operation, thixotropic paste for easy shaping, stable heat curing, compression set below 22%, excellent aspect ratio and high compression resistance, able to form stable elastic sealing beads inside housing grooves.
Q3: What is the difference between CIPG and traditional gaskets?
A: Traditional gaskets are pre-molded and assembled manually or mechanically; CIPG forms sealing beads directly on housings via dispensing equipment and cures in place. It fits complex structures better and supports highly automated flexible production.
Q4: What substrates can SIPA 1820-1K bond?
A: Applicable to metals, glass, silicone rubber, plastics, mica sheets, ceramics, stainless steel and more for various industrial bonding and sealing work.
Q5: Temperature resistance range of SIPA 1820-1K?
A: Stable elasticity maintained from -60℃ to +280℃, suitable for automotive electronics, industrial electronics and heating component applications with drastic temperature changes.
IX. Conclusion
CIPG housing sealing is far more than simple gluing work, which involves rheological property, bead forming, curing mechanism, compression resilience, temperature resistance, waterproofing, insulation and comprehensive long-term reliability.
For CIPG sealing of motor control boxes, EV water pumps, plastic-aluminum bonding, electric iron steam chambers and heating elements, ELAPLUS SIPA 1820-1K one-component heat-curable silicone adhesive delivers reliable overall sealing solutions by virtue of low compression set, easy one-component application, stable heat curing, superior aspect ratio and high compression resistance.
ELAPLUS — Make functional materials more reliable, make industrial sealing more efficient.
