About
A family business built on heat transfer fluids
Sub-Frost is a family-operated blender of heat transfer fluids in Westfield, IN, specializing in food-grade and heavy-duty inhibited propylene glycol. We have spent years in heat transfer fluids, and we put that experience into every blend: 100% virgin glycol, real corrosion protection, and delivery from a single case to a bulk tanker.
Proven base chemistry, blended to spec
We start with 100% virgin glycol from an industry-leading manufacturer and add our proprietary inhibitor packages, leak-detection dye, and custom pre-mix concentrations, so you get proven chemistry dialed in to your exact system.
You can prove what is in your loop
No recycled or under-concentrated blends. Every fluid is documented with TDS, SDS, and NSF registration where applicable, so you can show an auditor or an engineer exactly what is running in your system.
Family-operated, and we pick up the phone
We are a family-run business with years of hands-on experience in heat transfer fluids. When you call, you reach people who understand these systems and can help you get the fluid and concentration right.
Talk to someone who knows the chemistry
Reach a person who can help you spec the right fluid and concentration for your system.