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Contact cleaner spray12/10/2023 Polyester or Teflon based gasketing materials are less prone to this type of damage from harsh solvents. After the solvent flashes off, they may spring back to their original dimensions, or be permanently changed, impacting the effectiveness of the seal. Rubber, silicone or other seals or gaskets made of elastomeric (soft) materials can have a tendency to swell or shrink with exposure to harsh solvents. Alcohol and hydrocarbon based solvents tend to be better on sensitive plastics. Rigid plastics like ABS, polycarbonate (trade name Lexan), and acrylic materials like Plexiglass can be very sensitive to harsh solvents like toluene, xylene, and acetone. Rubber seals may swell, shrink or even dissolve if exposed to a harsh solvent. If the solvent used in a contact cleaner is incompatible with the plastic, it can craze (create small cracks), embrittle, or soften the material. While the contact surfaces of connectors are metal, they are often housed in plastic, and rubber gaskets to seal everything from the outside environment. In some cases, it could be considered a contamination - especially silicone oil, which tends to migrate.Ĭheck out " Safe & Effective Electrical Maintenance with Aerosol Contact Cleaners". That can be a good way to prevent oxidation, but it depends on your application and equipment. Additives - Some cleaners, like WD40, contain oils that are left behind. Plastic compatibility - Electrical devices often contain plastics and gasketing material that can be damaged by harsh solvents.Evaporation rate - Since there isn't opportunity to wipe the solvent off the inner parts of the electrical device, fast evaporation is very helpful.Flammability - If there is risk of flames or sparks, a nonflammable solvent is recommended.Solvency / cleaning strength - The solvent cleaner needs to be strong enough to dissolve oil and other contamination.Breaking down in this sense is described as a failure of insulating properties, where the electricity breaks free of the conductors and burns a path through the weakest area of the insulating materials. Dielectric strength is defined as the maximum electric field that the material can withstand under ideal conditions without breaking down. Dielectric strength - If you are cleaning energized (powered) equipment, use a cleaning solvent with a dielectric strength of 30 kV (30,000V) or higher. Spray force - Aerosol cleaners are generally used to penetrate into the tight areas around the contact and provide agitation.Other solvent cleaners an be used, but be aware or the following factors: We recommend choosing a solvent engineered specifically for contact cleaning.
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