Brake cleaner is a powerful solvent used to degrease brake components, ensuring optimal performance and safety. However, its potent cleaning power raises concerns regarding its use on plastic parts. This comprehensive guide explores the effects of brake cleaner on various plastics, offering practical advice on safe application and damage mitigation.
Understanding Brake Cleaner's Composition and Properties
Brake cleaners typically contain solvents like acetone, methyl ethyl ketone (MEK), or other hydrocarbons. These solvents are highly effective at dissolving grease, oil, and other contaminants but can also negatively impact certain plastics, causing damage ranging from minor surface discoloration to complete disintegration. The specific impact depends heavily on the type of plastic and the cleaner's formulation.
The Impact of Brake Cleaner on Different Plastics
Not all plastics react the same to brake cleaner exposure. Some are relatively resistant, while others are highly susceptible to damage. Here's a breakdown:
Plastics Resistant to Brake Cleaner:
- ABS (Acrylonitrile Butadiene Styrene): Commonly used in automotive parts, ABS plastics generally tolerate brief exposure to brake cleaner without significant damage. However, prolonged or repeated contact should still be avoided.
- Polypropylene (PP): Known for its strength and chemical resistance, polypropylene often withstands brake cleaner exposure well. Still, precaution is advised.
- High-Density Polyethylene (HDPE): This robust plastic exhibits good resistance to many chemicals, including some brake cleaner formulations. Again, minimizing contact duration is crucial.
Plastics Susceptible to Brake Cleaner:
- Polycarbonate (PC): While strong, polycarbonate can be susceptible to cracking or crazing (fine surface cracks) from brake cleaner exposure.
- Acrylonitrile Styrene Acrylate (ASA): While more resistant than some other plastics, ASA can still be affected by prolonged contact with brake cleaner.
- Polyvinyl Chloride (PVC): PVC is highly sensitive to many solvents and will likely be damaged by brake cleaner. Avoid contact at all costs.
Important Note: The manufacturer's specifications for the plastic part are crucial. If unsure about a plastic's composition, err on the side of caution and avoid brake cleaner altogether.
Safe Practices When Using Brake Cleaner Near Plastics
Even with resistant plastics, precautions are essential to minimize the risk of damage:
1. Test in an Inconspicuous Area:
Before applying brake cleaner to any plastic part, test it on a hidden area to observe its effect. This allows you to assess the plastic's reaction without causing visible damage.
2. Minimize Contact Time:
Apply brake cleaner sparingly and quickly. Avoid prolonged soaking or saturation of the plastic. A quick spray and wipe should suffice.
3. Use Protective Barriers:
If you must use brake cleaner near plastic components, cover them with masking tape or plastic sheeting to protect them from accidental spray.
4. Proper Ventilation:
Brake cleaner fumes are hazardous. Always work in a well-ventilated area to prevent inhalation of harmful vapors.
5. Appropriate Personal Protective Equipment (PPE):
Wear safety glasses and gloves to prevent accidental contact with skin or eyes.
Damage Control and Repair
If brake cleaner causes damage to a plastic part, the extent of the repair depends on the severity of the damage. Minor discoloration might be unnoticeable, while more significant damage might require replacement.
Conclusion:
While brake cleaner is a highly effective degreaser, its use around plastics requires careful consideration. Understanding the type of plastic and taking appropriate precautions minimizes the risk of damage. Always prioritize safety and remember that prevention is better than cure. When in doubt, consult the manufacturer's instructions for the specific plastic component, or explore alternative cleaning methods.
