7 best solvent for parts washer reviewed for 2025

When I first got my parts washer, I quickly learned that the machine itself is only half the battle; the real magic happens with the right solvent. After countless hours scrubbing grimy engine parts and caked-on grease from tools, I realized choosing the best solvent for parts washer makes all the difference in efficiency and effectiveness. From water-based to heavy-duty industrial degreasers, finding a good parts washer solvent can drastically cut down on elbow grease and leave your components sparkling. This guide breaks down seven top contenders, sharing my insights to help you pick the perfect one for your workshop.

IMAGE	PRODUCT NAME	AMAZON LINK
	Oil Eater Parts Washer Fluid, Water-Based Heavy Duty pH…	View on Amazon
	CRC Parts Washer Solvent, 5 Gal, 05067	View on Amazon
	B’laster 128-PWS Industrial Strength Parts Washer Solvent	View on Amazon
	R19835 PARTS WASHER SOLVENT 5 GAL/PAIL	View on Amazon
	Zep Dyna 143 Parts Washer Solvent – 20 Gallon (1…	View on Amazon
	Bestine Solvent and Thinner for Rubber Cement – Cleans…	View on Amazon
	Von Haas Parts Washer Solvent — 5-Gallon, Model# VHPW5	View on Amazon

Oil Eater Parts Washer Fluid, Water-Based Heavy Duty pH Neutral

This isn’t just another cleaning fluid; it’s a powerhouse that tackles the toughest grease and grime without being harsh. What truly sets Oil Eater apart is its water-based, pH-neutral, and biodegradable formula, making it a responsible choice for both your parts and the environment. It even includes a nutrient package that helps microbe colonies thrive in smart washers, effectively “eating” fats, oils, and greases. It’s a fantastic value, especially in the 5-gallon pail, and remarkably effective in heated systems.

Key features that stand out:
– Pro Strength, Heavy Duty Cleaning: Destroys grease and grime on automotive parts and industrial tools.
– Water-Based & Biodegradable: Eco-friendly and safe for smart washers.
– pH-Neutral Formula: Non-corrosive and safe on industrial equipment.
– Nutrient Package: Enhances microbe activity in bioremediating washers.
– Heat Tolerant: Works exceptionally well in heated systems.

Pros:
– Environmentally friendly and biodegradable.
– Safe for various materials and smart washers.
– Excellent for heavy-duty cleaning.
– Good value in a 5-gallon size.

Cons:
– May require a little longer soak time for extremely stubborn, baked-on deposits compared to some solvent-based options.

Best for: Eco-conscious users, smart washers, and those needing a safe, heavy-duty water-based solution.

Expert Opinion: This is my go-to recommendation for anyone concerned about chemical exposure or environmental impact. Its biological action is impressive, making it a forward-thinking choice for effective parts washer solvent degreasing.

CRC Parts Washer Solvent, 5 Gal, 05067

CRC’s Parts Washer Solvent is a professional-grade solution designed for rapid degreasing. It instantly cuts through grease, oil, dirt, and other contaminants, making quick work of dirty parts. What’s crucial for many shops is its zero VOC formula, meaning it contains no chlorinated solvents, which is a big plus for both safety and regulatory compliance. With a high flashpoint, it offers added peace of mind, making it suitable for a wide range of metal parts, most plastics, and even painted surfaces without causing damage.

Key features that stand out:
– Instant Grease Removal: Quickly eliminates grease, oil, and dirt.
– Versatile Application: Safe for all metal parts, most plastics, and painted surfaces.
– Zero VOC Formula: Free from chlorinated solvents for a safer environment.
– High Flashpoint of 204 °F: Reduces flammability hazards.
– Trusted Brand: From CRC Industries, a leader in chemical solutions.

Pros:
– Fast-acting and highly effective on various contaminants.
– Safe for multiple material types.
– Zero VOC and high flashpoint enhance safety.
– Comes in a convenient 5-gallon pail.

Cons:
– Its effectiveness might come with a stronger odor compared to water-based options.

Best for: Professionals and hobbyists seeking a fast, effective, and safer solvent-based degreaser without chlorinated solvents.

Expert Opinion: This solvent hits a sweet spot between powerful cleaning and improved safety. Its high flashpoint and zero VOC are significant advantages for a shop environment, making it a strong contender for the best solvent for parts washer in a professional setting.

B’laster 128-PWS Industrial Strength Parts Washer Solvent

B’laster is a name synonymous with tough jobs, and their Industrial Strength Parts Washer Solvent lives up to that reputation. This formula is engineered to aggressively cut through cutting oil, motor oils, and grease, leaving your parts remarkably residue-free. Its high flashpoint (145°F) contributes to a safer working environment compared to traditional solvents. You can confidently use it on all metals, most plastics, and painted surfaces, making it incredibly versatile for diverse cleaning needs.

Key features that stand out:
– Industrial Strength Cleaning: Easily cuts through cutting oil, motor oils, and grease.
– Residue-Free Finish: Leaves parts clean without sticky or oily residue.
– High Flashpoint Formula (145°F): Enhances safety during use.
– Multi-Surface Safe: Suitable for all metals, most plastics, and painted surfaces.

Pros:
– Extremely effective on heavy industrial contaminants.
– Ensures a clean, residue-free surface.
– Good safety profile with a high flashpoint.
– Versatile for various part types.

Cons:
– The industrial strength can sometimes mean a more noticeable odor.

Best for: Heavy-duty industrial and automotive applications where serious oil and grease removal is paramount.

Expert Opinion: When you’ve got parts drenched in cutting oil or old engine grease, B’laster is one of the first products I’d reach for. It’s built for tough cleaning, and its residue-free finish is a major plus for subsequent processes. A top choice for a powerful parts washer solvent.

R19835 PARTS WASHER SOLVENT 5 GAL/PAIL

This R19835 parts washer solvent is a robust, industrial-grade degreaser designed to tackle the most stubborn soil, oil, and grease from metal surfaces. Formulated specifically for cold solvent cleaning tanks, it eliminates the need for heating, making it both energy-efficient and safer to use. Its versatility allows for soaking, scrubbing, or spraying, adapting to various cleaning methods. A pleasant citrus fragrance is a welcome bonus, mitigating the strong chemical smell often associated with heavy-duty cleaners, improving the workshop atmosphere.

Key features that stand out:
– Effective Soil Removal: Removes tough buildup, oil, and grease from metal surfaces.
– Industrial-Grade Degreaser: Designed for demanding commercial and industrial applications.
– Cold Solvent Use: Effective without heating, saving energy and improving safety.
– Versatile Cleaning: Suitable for soaking, scrubbing, or spraying.
– Pleasant Citrus Fragrance: Reduces harsh solvent odors.

Pros:
– Powerful industrial cleaning performance.
– No heating required, saving energy.
– Flexible application methods.
– More pleasant working environment due to citrus scent.

Cons:
– As a cold solvent, it might take a bit longer for extremely thick, hardened contaminants.

Best for: Industrial and commercial settings where cold cleaning is preferred, and a more pleasant working environment is desired.

Expert Opinion: The ability to clean effectively without heat is a significant advantage, especially for larger shops or those with strict safety protocols. The citrus scent is a nice touch, making what can be an unpleasant task much more tolerable. A solid option for a heavy-duty parts washer solvent.

Zep Dyna 143 Parts Washer Solvent – 20 Gallon (1…)

Zep Dyna 143 is engineered for serious degreasing, quickly dissolving and removing grease, oil, and dirt from engine parts. This ready-to-use solution means no mixing, just pour and go, especially convenient for Zep Parts Washers. It’s composed of odorless solvents that are safe for all metals, preventing damage and ensuring compatibility. A standout feature is its elevated flash point (143°F), significantly higher than mineral spirits, which dramatically reduces flammability hazards. Its low evaporation rate and vapor pressure also minimize evaporative loss and employee exposure, making it more economical and safer for long-term use.

Key features that stand out:
– Effective Degreasing: Rapidly dissolves grease, oil, and dirt from engine parts.
– Ready-to-Use Solution: No mixing required, immediate use.
– Odorless Solvents: Safe for all metals and provides a better working environment.
– Elevated Flash Point (143°F): Significantly reduces flammability risks.
– Extended Use: Low evaporation rate minimizes loss and exposure.

Pros:
– Highly effective and fast-acting.
– Ready to use, no hassle.
– Odorless and safe for various metals.
– Enhanced safety with higher flash point and low evaporation.

Cons:
– A 20-gallon size might be overkill for smaller, occasional users.

Best for: High-volume professional workshops and industrial facilities requiring a highly effective, safe, and long-lasting parts washer solvent.

Expert Opinion: Zep Dyna 143 stands out for its safety features, particularly the high flash point and low evaporation. For busy shops, the “ready-to-use” aspect and effectiveness on engine parts make it a very practical and reliable choice.

Bestine Solvent and Thinner for Rubber Cement – Cleans…

While primarily known for thinning rubber cement, Bestine Solvent is a surprisingly versatile cleaner that deserves a spot on this list, especially for certain niche applications in a parts washer. It’s excellent for cleaning up ink, spray adhesives, and effortlessly removing stickers, labels, and decals without leaving behind messy residue. Crucially, it’s acid-free and safe to use on almost any surface, including most plastics, which makes it invaluable for delicate or specific cleaning tasks where traditional aggressive solvents might be too harsh. It’s not your typical heavy-duty degreaser, but its specialized cleaning power is undeniable.

Key features that stand out:
– Thins Rubber Cement: Ideal for artists and architects.
– Versatile Cleaner: Excellent for ink, spray adhesives, and general parts cleaning.
– Effortless Label Removal: Removes stickers and decals without residue.
– Multi-Surface Safe: Acid-free and safe for most plastics.

Pros:
– Exceptional for adhesive and ink cleanup.
– Safe on delicate surfaces and plastics.
– Leaves no residue.
– Multi-purpose utility beyond just a parts washer.

Cons:
– Not designed for heavy automotive grease and oil removal.

Best for: Specialized cleaning of parts with adhesives, inks, or decals, and for use on delicate plastics where a gentle yet effective solvent is needed.

Expert Opinion: Don’t overlook Bestine for its specialized capabilities. While it won’t strip an engine block of baked-on carbon, for cleaning delicate instrument panels or removing old gasketing adhesive, it’s virtually unmatched. A unique and valuable parts washer solvent for specific tasks.

Von Haas Parts Washer Solvent — 5-Gallon, Model# VHPW5

The Von Haas Parts Washer Solvent in a 5-gallon size offers a practical solution for general parts cleaning needs. Designed to effectively cut through common workshop contaminants, this solvent provides reliable degreasing power. It’s formulated for efficient use in standard parts washers, making it a straightforward choice for mechanics and hobbyists alike. The 5-gallon pail ensures you have ample supply for multiple cleaning jobs, offering good value for ongoing maintenance tasks.

Key features that stand out:
– Versatile Cleaning Power: Tackles a wide range of contaminants, from grease to grime.
– Effective Degreasing: Reliably removes oil and dirt from metal parts.
– Economical 5-Gallon Size: Provides ample fluid for ongoing cleaning needs.
– Suitable for Standard Parts Washers: Designed for general workshop use.

Pros:
– Good all-around cleaning performance.
– Economical bulk size.
– Straightforward and easy to use.
– Effective for common workshop grime.

Cons:
– May not offer the specialized features or extreme heavy-duty power of some premium options.

Best for: General workshop use, everyday maintenance, and those seeking a cost-effective, reliable parts washer solvent for common automotive and industrial components.

Expert Opinion: This solvent is a solid, no-frills choice for the average garage or workshop. It gets the job done without overcomplicating things, making it a reliable workhorse for routine cleaning tasks.

Helpful Comparison Short Insights

When picking the best solvent for parts washer, it really comes down to what you’re cleaning and your priorities. If environmental impact and safety are your top concerns, the Oil Eater Water-Based fluid is a clear winner, especially with its bioremediating properties. For fast, heavy-duty degreasing without chlorinated solvents, CRC and B’laster are excellent, with CRC having a higher flashpoint. If you prefer cold cleaning and a more pleasant scent, the R19835 with its citrus fragrance is a great choice. For professional shops needing high volume and enhanced safety, Zep Dyna 143’s high flash point and low evaporation rate make it stand out. And for specialized tasks like adhesive removal or cleaning delicate plastics, Bestine is an unexpected but incredibly effective solution. Finally, for general, all-around reliable cleaning at a good value, the Von Haas offers a practical solution.

Final Verdict

Choosing the absolute best solvent for parts washer isn’t a one-size-fits-all situation. For most home garages and small shops dealing with automotive and general mechanical parts, I’d lean towards CRC Parts Washer Solvent for its balance of powerful cleaning, zero VOC, and a good safety profile, or Oil Eater if a water-based, eco-friendly solution is a must. Professional shops with high volume will find Zep Dyna 143 an excellent investment due to its extended use and enhanced safety features. However, for specialized needs like adhesive cleanup, Bestine Solvent truly shines. Ultimately, consider the type of grime you’re tackling, the materials of your parts, and your safety and environmental preferences to make the smartest choice.

Comprehensive FAQ Section

Q1: What is the main difference between water-based and solvent-based parts washer fluids?
A1: Water-based fluids often use detergents, degreasers, and sometimes microbes to clean, making them generally safer for the environment and users, with less odor. They can be slower-acting but very effective. Solvent-based fluids typically use petroleum distillates or other chemicals to dissolve grease and oil quickly. They are often faster but can have stronger odors, higher VOCs, and flammability risks. The best solvent for parts washer depends on your priorities.

Q2: Are all parts washer solvents safe for all metals and plastics?
A2: No, not all solvents are safe for all materials. While most are designed for various metals, some aggressive solvent-based cleaners can damage certain plastics, rubber, or painted surfaces. Always check the product’s specifications for material compatibility. For delicate items or specific plastics, a product like Bestine might be a better choice.

Q3: What does “flashpoint” mean and why is it important for parts washer solvents?
A3: The flashpoint is the lowest temperature at which a liquid can form an ignitable vapor mixture in air. A higher flashpoint means the solvent is less volatile and less likely to ignite, making it safer to use in a workshop environment, especially around sparks or open flames. This is a key safety consideration when choosing the best solvent for parts washer.

Q4: Can I mix different types of parts washer solvents?
A4: It’s generally not recommended to mix different types of parts washer solvents. Mixing can lead to unpredictable chemical reactions, reduce effectiveness, create hazardous fumes, or damage your parts washer. Always stick to one type of solvent as directed by the manufacturer.

Q5: How often should I change my parts washer fluid?
A5: The frequency depends on how often you use your parts washer and how dirty the parts are. As a general rule, you should change the fluid when it becomes heavily contaminated, loses its cleaning effectiveness, or when an excessive amount of sludge accumulates at the bottom of the tank. For bioremediating fluids like Oil Eater, the microbes help extend the fluid’s life significantly.

Q6: Are there eco-friendly or biodegradable options for parts washer solvents?
A6: Yes, absolutely! Products like Oil Eater Parts Washer Fluid are excellent examples of water-based, biodegradable options that are pH-neutral and safe for smart washers. These eco-friendly choices help minimize environmental impact and are often safer for the user. When searching for the best solvent for parts washer, consider these options if sustainability is important to you.

Q7: Can I use household degreasers in my parts washer?
A7: While some strong household degreasers might seem appealing, they are typically not formulated for continuous use in a parts washer system. They may foam excessively, corrode parts washer components, or lack the necessary characteristics (like a suitable flashpoint for solvent-based washers) for safe and effective operation. It’s always best to use products specifically designed as parts washer solvent for optimal performance and safety.