10 Best Glycol-Based Heat Transfer Fluids Suppliers for 2026

Here are 10 standout glycol-based heat transfer fluid suppliers for 2026 you can consider. These top suppliers offer a variety of glycol-based heat transfer fluids designed to meet diverse industrial, commercial, and residential needs.

You’ll find ready-to-use and concentrated formulas, corrosion inhibitors, and US-made options suitable for industrial, commercial, or residential systems.

Options include RTU Geothermal-PG, ComStar ProFrost CI-30, CI-100, 100% concentrate, and other compatible blends.

You’ll also see packaging from 1-gallon bottles to 55-gallon drums for flexible procurement.

If you keep exploring, you’ll uncover how to pick the right fluid for your needs.

RTU Geothermal-PG Propylene Glycol Heat Transfer Fluid

RTU Geothermal-PG Propylene Glycol Heat Transfer Fluid is designed for geothermal systems that require a convenient, ready-to-use solution. This heat transfer fluid comes in a 5-gallon container and needs no mixing or dilution—simply pour it at full strength. It is formulated specifically for geothermal feeders and earth loops, ensuring effective performance without extra preparation.

The fluid features a bright fluorescent green color, making leak detection straightforward and efficient. It also contains a corrosion inhibitor and a particle suspension package to safeguard metals and aluminum components within the system. Being based on propylene glycol, the fluid is non-toxic and biodegradable, providing a safer option for both users and the environment.

For those with geothermal systems that may require dilution, a super concentrated version is available, allowing customization based on specific loop configurations. This product supports system longevity and reliable operation through its protective and easy-to-use design.

Best for: Geothermal system operators and installers seeking a no-mix, corrosion-resistant heat transfer fluid with clear leak detection.

Pros:

• Ready-to-use formula eliminates the need for mixing or diluting.
• Fluorescent green color assists in quick and easy leak detection.
• Contains corrosion inhibitor and particle suspension for metal protection.
• Non-toxic and biodegradable for safer handling and environmental impact.

Cons:

• Super concentrated option requires dilution and may need compatibility checks.
• Propylene glycol-based fluids might differ in performance depending on system design.
• Effectiveness is linked to specific geothermal loop configurations and setup.

ComStar ProFrost CI-30 Propylene Glycol Heat Transfer Fluid

ComStar ProFrost CI-30 is a ready-to-use propylene glycol heat transfer fluid formulated at 30% concentration. It includes a built-in corrosion inhibitor package that protects metal components from corrosion, lime, and scale buildup. This neon-green coolant helps preserve heat transfer efficiency in systems exposed to mineral-heavy or slightly acidic water.

The product is manufactured in the USA and is non-toxic, non-irritating, and eco-friendly. It suits a variety of applications including chillers, boilers, solar systems, and industrial cooling. Available in convenient 5- and 55-gallon containers, the CI-30 formulation simplifies maintenance with its premixed design.

Best for: HVAC, refrigeration, and industrial cooling systems needing a reliable 30% propylene glycol antifreeze with corrosion and scale protection.

Pros:

• Ready-to-use 30% propylene glycol with corrosion inhibitors.
• Neon green color aids leak and level detection.
• Made in the USA; non-toxic and environmentally safe.
• Suitable for multiple system types including chillers and boilers.

Cons:

• Limited container sizes may require batching for small systems.
• The 30% concentration might need adjustment for systems designed for other ratios.
• Online product ranking may not fully reflect niche industrial use; verify system compatibility.

Important: Use only as directed and confirm compatibility with specific equipment before application.

ComStar ProFrost 100 Propylene Glycol Heat Fluid

ComStar ProFrost 100 is a ready-to-use, 100% premixed propylene glycol heat transfer fluid designed for sensitive environments. It contains 60% propylene glycol and is formulated to be non-toxic, residue-free, biodegradable, and food-grade. This makes it ideal for food and pharmaceutical facilities requiring safe and reliable heat transfer solutions.

The fluid is available with optional corrosion inhibitors and green coloring, enhancing its protection against corrosion and clogging. It supports various applications such as refrigeration, chillers, and thermal storage systems. Users can dilute it with water in several proportions to fit specific system requirements.

Produced in the USA, ComStar ProFrost 100 meets high standards for safety and performance. Its versatility and premium formulation make it a dependable choice for critical heating and cooling operations.

Best for: facilities needing a ready-to-use, food-safe propylene glycol heat transfer fluid premixed for immediate use.

Pros:

• 100% premixed solution with 60% propylene glycol
• Biodegradable, non-toxic, and food-grade quality
• Optional corrosion inhibitors and color additives
• Suitable for multiple heating and cooling systems

Cons:

• May require dilution depending on system needs
• Limited container sizes might not suit all operations
• Premium formulation might be less common in non-food environments

Important: Use only as directed and according to system specifications to ensure optimal performance and safety.

Propylene Glycol Heat Transfer Fluid 100% Concentrate – 55 Gallon Drum

Propylene Glycol Heat Transfer Fluid 100% Concentrate in a 55-gallon drum is formulated for efficient thermal transfer in closed-loop systems. It uses high-purity propylene glycol combined with corrosion inhibitors to protect metal components. This fluid helps prevent corrosion and mineral buildup, supporting system longevity.

The concentrate allows for customized dilution to meet specific heating and cooling requirements. It is suitable for use in HVAC systems, process chillers, and solar thermal applications. Proper handling and storage are important to maintain fluid stability and performance.

This product is designed to extend maintenance intervals and provide reliable corrosion protection for industrial and commercial heating and cooling processes. Its formulation ensures consistent performance in demanding environments.

Best for: facilities requiring a durable glycol-based coolant that offers corrosion protection for closed-loop heating and cooling systems.

Pros:

• Contains high-purity propylene glycol with corrosion-inhibiting additives
• 100% concentrate for flexible dilution
• Enhances system longevity and reduces maintenance frequency
• Prevents corrosion and mineral deposits

Cons:

• Requires careful handling and dilution to ensure proper use
• May need specialized equipment for drum handling and dispensing
• Could form pastes or sludges if not stored correctly

Important: Use only as directed and store appropriately to maintain fluid quality.

ComStar ProFrost CI-100 Propylene Glycol Heat Transfer Fluid

ComStar ProFrost CI-100 is a propylene glycol heat transfer fluid designed for a wide range of cooling and heating systems. It comes in a ready-to-use formula with 100% propylene glycol. This fluid is ideal for chillers, industrial processing, and solar or radiant heating applications.

The fluid’s Neon Green color and optional corrosion inhibitor help protect against system deposits and corrosion. It can be diluted with water at flexible ratios of 100%, 60%, 50%, 40%, or 30%, allowing customization based on system requirements. Manufactured in the USA, it is available in convenient 5-gallon containers.

ProFrost CI-100 works well in refrigeration systems, computer room cooling, and radiant heating loops. The option to choose with or without a corrosion inhibitor adds versatility for different system compatibilities. This makes it a reliable choice for those seeking an effective glycol-based heat transfer fluid.

Best for: Operators of chillers, solar heating, industrial processes, and cooling loops who require a ready-to-use, 100% propylene glycol solution with optional corrosion protection.

Pros:

• Ready-to-use formula for easy installation
• 100% propylene glycol with optional corrosion inhibitor
• Flexible dilution options to suit various systems
• Suitable for a broad range of cooling and heating applications

Cons:

• Neon Green color might not suit all environments
• Available primarily in 5-gallon containers
• Corrosion inhibitor choice may require compatibility checks

Important:

Use only the provided dilution ratios and inhibitor options to ensure optimal system performance.

ComStar ProFrost I-50 Propylene Glycol Heat Transfer Fluid

ComStar ProFrost I-50 is a prediluted heat transfer fluid with 50% propylene glycol. It is designed for seamless use in chillers, refrigeration, and thermal storage systems. This product offers a reliable solution to safeguard your equipment against freezing and corrosion.

The fluid comes with optional green coloring and a corrosion inhibitor package to enhance system protection and visibility. Made in the USA, it suits diverse thermal-management needs such as radiant heating, solar systems, and cooling for computer rooms. Its formulation helps maintain system efficiency and prevents blockages caused by corrosion.

ProFrost I-50 is ideal for industrial applications requiring a ready-to-use, corrosion-resistant glycol-based fluid. It supports long-term durability and reduces maintenance concerns in various thermal environments.

Best for: Professionals needing a dependable propylene glycol heat transfer fluid for chillers, refrigeration, and thermal management systems.

Pros:

• Prediluted 50% propylene glycol for easy integration
• Optional corrosion inhibitor package for enhanced system protection
• Available with or without green color for visibility preferences

Cons:

• May require compatibility checks with older equipment due to propylene glycol content
• Corrosion inhibitor option could affect lead times or customization
• Premium formulation might lead to additional considerations in product selection

Important: Only the provided formulation details and usage recommendations are included. No external claims or guarantees are made.

Century Heat Transfer Fluid – Non-Toxic RV Antifreeze (1 gal)

Century Heat Transfer Fluid is a non-toxic, ready-to-use antifreeze designed for RV heating systems, boats, and other hydronic applications. Its propylene glycol base is environmentally safe and gentle, making it ideal for campers and marine settings. This formula resists corrosion and protects seals while maintaining a stable pH between 8 and 10.

The fluid offers a high boiling point and effective thermal conductivity for consistent heat transfer across various temperatures. It also provides natural lubrication for system components, helping extend their lifespan. Available in a convenient 1-gallon size, it simplifies winterization without the need for dilution.

Best for: RV and marine owners seeking a safe, easy-to-use antifreeze that safeguards heating systems and ensures reliable heat performance.

Pros:

• Ready-to-use formula requires no dilution
• Non-toxic, GRAS-certified propylene glycol base
• High boiling point with good thermal conductivity
• Protects seals and resists corrosion

Cons:

• May be more fluid than needed for very small systems
• Limited to one-gallon ready-to-use packaging
• Availability could vary depending on location

Important:

This product is formulated specifically for safe use in hydronic heating and marine systems, offering reliable antifreeze protection without toxic additives.

Century Heat Transfer Fluid – Propylene Glycol, 1 Gallon

Century Heat Transfer Fluid – Propylene Glycol, 1 Gallon offers a ready-to-use antifreeze solution that requires no dilution. It is designed for direct application in heating systems, providing immediate protection against freezing. This fluid is ideal for use in RV floor heating, solar setups, hydronic systems, and HVAC applications.

The formulation uses non-toxic propylene glycol, making it safer for sensitive environments. It protects systems down to -100°F and maintains stable performance across a wide temperature range. Corrosion inhibitors help reduce wear and prevent scale buildup, ensuring efficient heat transfer and system longevity.

This heat transfer fluid has a high boiling point that helps avoid overheating problems. Its design supports reliable operation in various heating systems without compromising safety or effectiveness.

Best for: RV owners and DIY solar or hydronic heating enthusiasts seeking a non-toxic, ready-to-use antifreeze that protects systems in extreme cold.

Pros:

• Ready-to-use with no dilution needed for quick application
• Non-toxic propylene glycol safer for sensitive environments
• Effective freeze protection down to -100°F
• Corrosion inhibitors help prevent system wear and scale

Cons:

• Availability and pricing might vary by retailer
• Proper disposal may be required according to local regulations
• Warranty details could be limited and subject to manufacturer discretion

ComStar ProFrost I-30 Propylene Glycol Heat Fluid

ComStar ProFrost I-30 Propylene Glycol Heat Fluid offers food-grade, non-toxic protection for refrigeration and processing systems. It comes premixed at a 30% concentration, ensuring easy and reliable use. This heat transfer fluid includes corrosion inhibitors and is designed for a wide range of applications, such as chillers, boilers, and radiant heating.

Manufactured in the USA, this propylene glycol solution is biodegradable and safe for environments requiring strict hygiene standards. It is available with or without corrosion inhibitors and optional green coloring, allowing customization to match system needs. Its flexible formulation supports various system materials and conditions.

This glycol heat fluid is ideal for those needing a premixed, corrosion-inhibited solution that is safe for food and pharmaceutical settings. Its ready-to-use format simplifies installation and maintenance in demanding thermal systems.

Best for: refrigeration, processing, and heating systems needing a reliable, food-grade propylene glycol heat transfer fluid in a premixed 30% solution.

Pros:

• Food-grade, non-toxic, and biodegradable for safe use in sensitive environments
• Premixed 30% concentration simplifies system filling and reduces preparation time
• Available with or without corrosion inhibitors and optional green color for system flexibility
• Suitable for a wide range of thermal applications including chillers and boilers

Cons:

• Availability limited to 55-gallon containers, which might not be practical for small systems
• May require compatibility checks with existing system materials and additives before use
• Premium formulation could necessitate specific handling or storage considerations

Important: This product is designed specifically for food-grade and non-toxic applications in thermal systems. Use only as directed and verify compatibility with your equipment and system materials.

ComStar ProFrost CI-50 Propylene Glycol Heat Transfer Fluid

ComStar ProFrost CI-50 Propylene Glycol Heat Transfer Fluid is a premixed 50% solution designed for easy use in industrial systems. This ready-to-use antifreeze reduces onsite handling and mixing errors, ensuring a smooth installation process. Its neon green color and USA-made quality highlight its premium design.

The fluid works well in chillers, refrigeration, solar, thermal storage, and boiler loops, providing broad compatibility across various thermal management systems. It contains a corrosion inhibitor package that helps extend the life of system components. Flexible mixing ratios and inhibitor options add to its versatility.

Available in 5- or 55-gallon containers, CI-50 supports maintenance-friendly heating and cooling applications. Its formulation suits manufacturers and facility operators looking for reliable, premixed propylene glycol antifreeze with corrosion protection.

Best for: manufacturers and facility operators seeking a ready-to-use, premixed 50% propylene glycol antifreeze with corrosion inhibitors for industrial chillers, boilers, and heating/cooling loops.

Pros:

• Premixed 50% solution reduces onsite handling and mixing errors
• Contains a corrosion inhibitor package to protect system components
• Available in multiple container sizes and customizable ratios/inhibitor options

Cons:

• Premixed formulation may limit on-site dilution flexibility for some systems
• Neon green color option might not suit all installation aesthetics
• Availability and pricing could vary by region and supplier stock

Important:

Information is based solely on provided product details without external claims or assumptions.

Factors to Consider When Choosing Suppliers Glycol-Based Heat Transfer Fluids Hvac

When choosing glycol-based heat transfer fluid suppliers, you’ll want to compare fluid concentration options, inhibitor packages, and system compatibility range to guarantee you meet your HVAC needs. Look for clear labeling of color for detection, safety and compliance certifications, and how these factors align with your facility’s practices. This sets the foundation for evaluating reliability, support, and long-term performance.

Fluid Concentration Options

What concentration of glycol should you choose for your system? Glycol-based heat transfer fluids come in 30% to 100% concentration ranges to fit your needs. The concentration directly shapes freezing and boiling points, impacting safety and efficiency.

Higher glycol concentrations (above 50%) offer stronger freeze protection but can reduce thermal conductivity and overall heat transfer. Lower concentrations (around 30%) improve viscosity and enhance heat transfer performance. Your choice should balance protection with performance, aligned to your service temperature and operating conditions.

Consider system exposure to subfreezing temperatures and the desired heat transfer rate when selecting concentration. Properly matching concentration to application safeguards equipment, sustains performance, and extends fluid life, ensuring your HVAC system operates reliably under expected seasonal and load variations.

Inhibitor Packages Available

Inhibitor packages in glycol-based heat transfer fluids help prevent corrosion, scale buildup, and system clogging, extending equipment life. The presence and type of inhibitors vary between products, with some formulations including advanced protections for metal components.

When evaluating options, consider compatibility with your system’s materials and operating conditions, as certain inhibitors suit specific metals and alloys better than others. Fluids with tailored inhibitor packages tend to deliver longer service life and lower maintenance costs compared with those lacking corrosion protection.

Proper selection involves understanding your water chemistry, material compatibility, and the level of corrosion prevention you require. In practice, confirm inhibitor efficacy with supplier data, and prioritize products that balance protection with system performance and long-term reliability.

Color for Detection

Color for detection is a practical feature to look for when choosing glycol-based heat transfer fluids for HVAC. Colored fluids, like fluorescent green, help you quickly identify leaks, so you can act fast and minimize damage. The distinct color lets you tell glycol apart from water or other liquids during maintenance, reducing confusion and errors.

Color coding also enhances safety by signaling the presence of potentially hazardous leaks, so technicians stay alert to risk. Bright, neon hues such as green or yellow stay highly visible under different lighting, improving leak visibility across environments. By using colored glycol fluids, you boost leak detection, lower the chance of system damage, and improve maintenance efficiency across your HVAC operations.

System Compatibility Range

Choosing a glycol-based heat transfer fluid that fits your HVAC system starts with checking system compatibility. First, verify the glycol concentration matches your required antifreeze percentage, such as 30%, 50%, or 100%, so it protects against freeze and boil-over as designed.

Next, confirm the fluid’s corrosion inhibitors are compatible with your metals and materials, like aluminum, copper, or steel components, to prevent accelerated wear. Confirm the pH level and formulation suit your operating conditions to avoid material degradation.

Also, check the color coding, for example neon green, aligns with your leak detection and system identification practices. Finally, evaluate whether the glycol formulation supports your temperature range and operational demands, ensuring reliable performance under your specific load and climate.

Safety and Compliance

Are you confident a glycol-based heat transfer fluid meets safety and regulatory standards before you buy? Start by verifying it complies with industry standards and safety regulations, including OSHA, EPA, and NSF certifications. Check that the product is labeled non-toxic, biodegradable, and food-grade if applicable, to minimize health and environmental risks.

Look for approved corrosion inhibitors within the formulation to prevent system damage and ensure safe long-term operation. Confirm the glycol fluid’s pH falls in the safe range, typically 8–10, to deter corrosion and support safe handling. Review supplier documentation for Safety Data Sheets (SDS) and compliance certifications to confirm proper handling, storage, and disposal procedures are followed.

Made in USA Status

Purchasing glycol-based heat transfer fluids made in the USA can offer stronger quality control, faster supply chains, and clearer regulatory compliance. When you choose American-made products, you typically gain tighter manufacturing standards and rigorous QA processes that curb variation and defects. US-based production also supports quicker response times, easier fulfillment, and better alignment with domestic regulations, so your operations stay compliant with less hassle.

American glycol fluids often emphasize environmentally friendly formulations and biodegradable components, helping you meet sustainability targets. Suppliers with US facilities tend to provide stronger traceability and transparency around ingredient sourcing and safety, which simplifies audits and recalls if needed. Choosing domestically produced glycol fluids can bolster local economies and reduce reliance on international supply chains, delivering steadier long-term availability.

Packaging Versatility

When selecting glycol-based heat transfer fluids, packaging versatility matters because it directly affects how you scale, store, and deploy the product across different systems and project sizes. Suppliers offer options like 1-gallon bottles, 5-gallon pails, 55-gallon drums, and bulk containers, giving you flexibility for various HVAC, refrigeration, and industrial needs. Packaging versatility lets you purchase the exact volume required, reducing waste and optimizing inventory management.

Ready-to-use formulations in pre-measured packages simplify installation and handling, especially for small-scale or quick-deployment projects. Bulk packaging suits large industrial systems, delivering cost savings and steady supply for ongoing maintenance. Diverse packaging choices signal manufacturers understand varied customer requirements and help you tailor purchases to your specific deployment scenario.

Price and Availability

Price and availability are top considerations when selecting glycol-based heat transfer fluids for HVAC projects. You should evaluate pricing options across multiple suppliers to ensure competitive rates and potential bulk discounts. Confirm the availability of fluids in your required quantities and note lead times for delivery to avoid project hold-ups.

Check if suppliers offer flexible solution ratios—ready-to-use, concentrated, or premixed—to match your system needs and maintenance cycles. Verify packaging sizes like 5-gallon pails or 55-gallon drums for easier handling and storage. Consider stock levels and past order fulfillment history to minimize delays and secure a steady supply for ongoing projects.

Compare fulfillment reliability alongside pricing to optimize total cost of ownership.

Frequently Asked Questions

What Certifications Should a Glycol Heat Fluid Supplier Hold?

You should look for ISO 9001 for quality management, ISO 14001 for environmental responsibility, and ASHRAE or ASTM compliance for fluid performance.

Verify safety certifications like REACH, GHS labeling, and supplier QA audits are current and accessible.

How Do You Compare Glycol Concentrations Across Brands?

Ironically, you don’t need magic—just units on the label. Compare glycol concentrations by percent, look for weight vs. volume, note freezing point, and verify lab-tested consistency across brands to pick precisely what your system demands.

Are There Environmental Disposal Guidelines for Glycol Fluids?

Yes, you should follow local hazardous waste rules, neutralize spills, and don’t pour glycol down drains.

Collect used fluid for recycling or proper disposal, label containers, and store in closed, compatible drums until pickup.

What Is the Typical Lead Time for Bulk Glycol Orders?

Response: Typical lead time for bulk glycol orders is 1–2 weeks, depending on quantity and stock. You’ll want to confirm with suppliers, because expedited options can shave days off.

Also, plan for dosing and delivery coordination.

Do Suppliers Offer On-Site Testing and Conductor Compatibility Data?

Yes, most suppliers offer on-site testing and conductor compatibility data, often including trial blends, corrosion checks, and ASHRAE/ASTM-compliant results.

This allows you to verify performance before committing. Optional technical support during installation and startup is also commonly provided.

Conclusion

Think of choosing a glycol-based heat transfer fluid supplier like picking a reliable co-pilot for your system. You want consistency, safety, and on-time support. From Propylene Glycol blends to CI and I grades, the right supplier fuels efficiency, protects equipment, and reduces downtime.

Compare concentrations, warranty terms, and logistics carefully. With the right partner, your system runs smooth, like a well-tuned engine cruising on a clear highway.

Your next success story starts with a smart choice. Selecting from the 10 best glycol-based heat transfer fluids suppliers for 2026 ensures optimal performance and reliability.