Kontakt Chemie Plastik 70 – Transparent Acrylic Conformal Coating

Kontakt Chemie Plastik 70 is a fast-drying, transparent acrylic conformal coating specially developed for protecting printed circuit boards (PCBs), electronic components, electrical assemblies, coils, transformers and other compatible surfaces from moisture, dust, oxidation, corrosive vapours and other atmospheric influences. It forms a thin, transparent, flexible and electrically insulating protective film that helps reduce electrical leakage, short circuits, sparking and corona effects.

Universal PCB Protection

Kontakt Chemie Plastik 70 is designed primarily as a conformal coating for printed circuit boards. Electronic circuits can be affected by humidity, dust, oxidation and airborne contaminants, which may reduce insulation resistance and contribute to leakage currents or short circuits. Plastik 70 creates a protective insulating layer over the PCB and components, helping shield the assembly from these environmental influences.

The coating is transparent, so PCB tracks, component markings and other details remain visible after application. This makes it particularly useful for electronics repair, servicing, maintenance and production applications where visual inspection of the circuit is important.

Acrylic-Based Protective Coating

Plastik 70 is a low-viscosity, solvent-drying acrylic-based conformal coating. After application and drying, it produces a colourless, transparent and elastic film with good insulating properties. The film is designed to maintain its transparency and flexibility over time.

The coating adheres well to commonly used materials including metal, plastic, wood and glass, making it useful beyond PCB protection when the surface is compatible with the coating and its solvents.

Electrical Insulation

A major advantage of Kontakt Chemie Plastik 70 is its electrical insulating performance. The coating provides a high-resistance protective film that helps separate conductive areas and protect electronic circuits from environmental conditions that could cause unwanted electrical leakage.

Technical data for the product specifies a dielectric strength above 80 kV/mm, surface resistivity above 10¹³ Ω, and volume resistivity above 10¹³ Ω·cm under the stated test conditions.

This makes Plastik 70 suitable for applications where both environmental protection and electrical insulation are required.

Moisture and Environmental Protection

Moisture is one of the common causes of deterioration in electronic assemblies. Humidity and contamination can reduce insulation resistance and contribute to corrosion or leakage between PCB tracks.

Kontakt Chemie Plastik 70 forms a protective barrier against moisture, oxidation, dust and corrosive atmospheric contaminants. The manufacturer also states that the coating can protect PCBs and surfaces exposed to humid inorganic-acid or caustic vapours.

The dried film also has resistance to diluted acids, alkalines and atmospheric attack under the manufacturer’s specified conditions.

Fast Drying

Plastik 70 is designed for applications where fast processing is important. Typical drying time is approximately 15–20 minutes at 20°C, although actual drying time can vary according to coating thickness, ventilation, temperature and environmental conditions.

Its fast-drying characteristics make it suitable for electronics repair and production environments where assemblies need to be handled again without unnecessarily long waiting periods.

Transparent and Flexible Finish

After drying, Kontakt Chemie Plastik 70 forms a clear, colourless and flexible protective film. Unlike an opaque paint or coating, it allows the PCB and its components to remain visible.

The manufacturer states that the coating remains transparent and flexible even after long periods. This is useful for service technicians who may need to inspect component markings, solder joints and PCB tracks after the coating has been applied.

Solderable for Repair Work

Another useful feature for electronics servicing is that Plastik 70 can be soldered through for repair work. This means technicians can carry out suitable soldering operations without necessarily removing the complete coating from the PCB.

When complete removal is required, the technical documentation states that the coating can be removed using acetone or THINNER FOR PLASTIK 70, subject to material compatibility and appropriate safety procedures.

PCB and Electronics Applications

Kontakt Chemie Plastik 70 can be used for a wide range of electronic and electrical applications, including:

• Printed circuit board protection
• PCB conformal coating
• Electronic component protection
• Electrical insulation
• Power supply PCB protection
• Control board protection
• Industrial electronics
• Automotive electronics
• Electrical assemblies
• Coil insulation
• Transformer insulation
• Wire and cable protection
• Electronic repair and maintenance
• Protection against humidity and atmospheric contamination

The manufacturer’s technical information specifically describes its use for PCBs and as an additional insulating lacquer for coils and transformers.

Application on Coils and Transformers

In addition to PCB protection, Plastik 70 can be used as a fixing and insulating lacquer for coils and transformers. It can provide additional insulation and may help reduce unwanted mechanical noise from windings.

This makes the product useful for technicians working with electrical motors, transformers, inductors and other electromagnetic components where an additional insulating coating may be beneficial.

Application Instructions

For small-scale repair and service work, the aerosol version is one of the easiest ways to apply Plastik 70.

Before application:

1. Make sure the surface is clean, dry and free from grease and contamination.
2. Remove dirt, flux residues and other contaminants from the PCB.
3. Spray the coating from approximately 20–30 cm away from the surface.
4. Apply an even coating rather than an excessively thick layer.
5. Allow the coating to dry adequately before returning the equipment to service.

The technical data sheet recommends cleaning PCBs before coating and specifically mentions the use of KONTAKT PCC for removing grease, dirt and flux residues.

Moisture Warning Feature

An interesting feature of Plastik 70 is its ability to visually indicate when it is being applied to a humid surface. According to the technical documentation, if the surface contains moisture, the coating can develop a frosted or matte appearance. This provides a warning that moisture may have been trapped beneath the coating.

For the best protective performance, the surface should therefore be properly dried before coating.

Temperature Resistance

Kontakt Chemie Plastik 70 has a stated working temperature range of approximately -40°C to +60°C, with short-term temperature peaks up to approximately +100°C.

The product should be selected according to the actual temperature conditions of the application. For applications requiring higher continuous temperature resistance, a different conformal coating formulation may be more appropriate.

Available Packaging

Kontakt Chemie lists Plastik 70 in multiple package sizes, including 200 ml and 400 ml aerosol versions, as well as 1 litre and 5 litre bulk containers.

The exact contents, label information and part number should be checked according to the specific package being purchased.

Key Features

• Fast-drying acrylic conformal coating
• Transparent and colourless finish
• Excellent electrical insulation properties
• Helps protect against moisture and humidity
• Helps protect against oxidation and dust
• Protection against corrosive atmospheric influences
• Good adhesion on compatible metal, plastic, wood and glass surfaces
• Resistant to diluted acids and alkalines under specified conditions
• Flexible protective film
• Remains transparent over time
• Can be soldered through for repair work
• Can be removed with suitable remover/solvent
• Helps reduce leakage currents and short circuits
• Helps prevent sparking and corona effects
• Suitable for PCB and electronic applications
• Available in aerosol and bulk packaging

These features are based on the manufacturer’s product information and technical documentation.

Technical Specifications

The exact specifications can vary by package or product revision, so the current technical data sheet should be checked for the particular variant.

Why Choose Kontakt Chemie Plastik 70?

Kontakt Chemie Plastik 70 is a practical solution for users who need a transparent, fast-drying and electrically insulating conformal coating for electronic assemblies. It provides protection without hiding PCB components and markings, making future inspection and servicing easier.

Its combination of acrylic construction, electrical insulation, environmental protection, flexibility, fast drying and solder-through capability makes it suitable for both professional electronics maintenance and PCB repair applications.

Safety and Handling

Plastik 70 aerosol products contain flammable propellants/solvents and should be handled carefully. The aerosol is classified as extremely flammable, and the pressurized container may burst if heated. Appropriate ventilation, ignition-source control and personal protective measures should be used according to the current Safety Data Sheet.

Always follow the manufacturer’s current Technical Data Sheet (TDS) and Safety Data Sheet (SDS) for storage, handling, application and disposal requirements.

Conclusion

Kontakt Chemie Plastik 70 is a professional transparent acrylic conformal coating for PCB and electronic protection. It creates a flexible insulating film that helps protect electronic circuits from moisture, dust, oxidation and corrosive atmospheric influences while helping reduce electrical leakage and short circuits. Its transparent finish keeps PCB components and markings visible, while its fast drying and solder-through characteristics make it particularly useful for electronics repair and maintenance.

With applications ranging from PCB conformal coating and electronic insulation to coil and transformer protection, Plastik 70 is a versatile coating for electronics professionals, technicians, manufacturers and maintenance users who require reliable environmental and electrical protection.