Is mineral spirits good for a parts washer?
Choosing the wrong cleaning fluid can damage parts, harm machines, and create fire risks.
Mineral spirits are commonly used in parts washers because they dissolve grease and oil effectively. However, they are flammable and must be handled with caution. Always verify material compatibility and local safety regulations before use.
At Prime, we advise clients setting up maintenance operations on selecting the right cleaning fluids to protect parts and extend machine life.
What is the best solvent for a parts washer?
Not all solvents clean the same way—some can even damage your parts or washer system.
The best solvent for a parts washer depends on the application. Mineral spirits, aqueous-based cleaners, and petroleum-based solvents are top choices, depending on dirt type and part material.
Mineral spirits clean greasy metal parts well. Aqueous cleaners are safer and better for aluminum or softer metals. Prime recommends selecting based on part material, contaminant type, and fire safety needs.
Popular Solvent Types
| Solvent Type | Best For | Safety Notes |
|---|---|---|
| Mineral Spirits | Heavy grease, oils | Flammable, needs ventilation |
| Aqueous Cleaners | Light oils, dirt | Water-based, safer |
| Petroleum-Based Solvents | Heavy-duty industrial grime | High VOCs, strong odor |
We supported an automotive parts supplier in choosing aqueous cleaning systems, reducing their fire risks and improving workspace safety ratings.
What is the best fluid to use in a parts washer?
Different fluids work better depending on the parts and level of contamination.
The best fluid to use in a parts washer balances strong cleaning power, material safety, and low fire risk. Popular options include mineral spirits, water-based detergents, and specialty bio-based solvents.
Mineral spirits are ideal for steel parts with heavy oil. Aqueous solutions work better for plastics or mixed materials. Prime advises clients to match fluid choice to part material and contamination type.
Recommended Fluids by Application
| Part Material | Best Cleaning Fluid |
|---|---|
| Steel | Mineral spirits, petroleum solvent |
| Aluminum | Water-based cleaner |
| Plastics | Aqueous or bio-solvent |
| Mixed Metals | Mild water-based detergents |
In one client case, switching to low-VOC water-based cleaners allowed them to stay compliant with stricter environmental regulations—without sacrificing cleaning power.
What not to put in a parts washer?
Some chemicals cause serious damage or safety risks when used incorrectly.
Never put gasoline, acetone, brake cleaner, highly flammable or highly volatile chemicals in a parts washer. They can cause fires, explode under heat, or damage seals and pumps.
Always check chemical compatibility charts for your parts washer system. Prime provides material safety guidance when shipping machine parts or industrial cleaning supplies.
Fluids to Avoid in Parts Washers
| Dangerous Fluid | Why It’s Unsafe |
|---|---|
| Gasoline | Highly flammable, explosive |
| Acetone | Attacks seals, fast evaporation |
| Brake Cleaner | Produces toxic vapors |
| Paint Thinner | Excessive VOCs, fire hazard |
One metalworking shop avoided a major fire incident after switching to Prime-recommended, low-flashpoint cleaning fluids for their washer stations.
What chemical is used in a parts washer?
Different cleaning tasks need different chemical formulations.
Common chemicals used in parts washers include mineral spirits, petroleum distillates, water-based alkaline detergents, and biodegradable solvents.
Choice depends on contamination level, material sensitivity, and environmental regulations. Prime helps clients choose between traditional solvents and eco-friendly cleaners, depending on their operational needs.
Common Parts Washer Chemicals
| Chemical Type | Common Use |
|---|---|
| Mineral Spirits | Oil, grease removal |
| Petroleum Distillate | Heavy carbon and grime |
| Alkaline Detergent | General-purpose light cleaning |
| Bio-Based Solvent | Eco-friendly degreasing |
A manufacturing plant client improved maintenance cycle times by 20% after switching to Prime-sourced alkaline cleaners, cutting grease without damaging seals or rubber parts.
Conclusion
Mineral spirits work in parts washers, but always consider fire risk, material safety, and alternative eco-friendly fluids for the best results.
Need advice on selecting safe, effective parts washer fluids or fasteners? Contact Prime today for a free consultation, product guidance, and ISO-certified industrial solutions—delivered fast, globally.
