Janesville, Wisconsin – December 15, 2025 – Rock Energy Systems (RES) today announced the launch of Frigid Fix™, a high-performance diesel additive engineered to keep portable heaters and diesel engines running in extreme cold. The formula prevents fuel gelling below 15 °F, improves cold starts, cleans nozzles and injectors for better combustion, and stabilizes fuel year-round.
There are many diesel additives on the market, but Frigid Fix™ was developed as a special formula to be accepted by fuel-fired portable heaters that run on diesel. As a brand built by Rock Energy Systems, we understand the real-world problems caused by diesel gelling. With more than 50 years of experience designing, building, and supporting heating equipment, we also recognized that there has never been an additive engineered specifically to help portable heaters fire up quickly and run at peak performance in frigid temperatures.
Frigid Fix is formulated for all brands of portable heaters, not just SunFire®. It has been tried and tested extensively by RES technical teams. “We have put Frigid Fix through real job site conditions, multiple heater platforms, and deep cold testing. It works great, and it does more than prevent gelling,” said John McCown, Engineering Manager at RES.
In addition to portable heaters, Frigid Fix is just as effective in diesel engines of any kind. The additive is fully manufactured in the USA and made with high-quality components to ensure heaters and diesel engines start easily in cold temperatures.
“We saw a clear need in the market for a fuel additive built specifically for the portable heaters our customers rely on,” said Tim Burgin, Vice President of Sales and Marketing at Rock Energy Systems. “We solved that need by creating Frigid Fix® for diesel portable heating systems.”
Key Performance Highlights
- Prevents fuel gelling below 15 °F
- Improves Nozzle/Injector Spray
- Fuel Stabilizer & Revitalizer
- Removes Water & adds Lubricant
- Safe for all Diesel Engines
The launch of Frigid Fix strengthens RES as a leader in cold-weather performance solutions across industrial, agricultural, automotive, and construction environments.
Frigid Fix is available now for direct purchase at FrigidFix.com. Customers can also purchase the additive through the SunFire brand at SunFireHeaters.com/FrigidFix.
About Rock Energy Systems
Rock Energy Systems is the parent company of Clean Burn®, EnergyLogic®, Lanair®, SunFire® and Frigid Fix™. RES brands are known for American-built durability and industry-leading portable heating performance.
About Frigid Fix®
Frigid Fix is a premium diesel additive formulated to prevent gelling, improve ignition, and stabilize fuel for both diesel engines and diesel-fired portable heaters.
Media Contact: Kristen Monroe, Marketing Manager | Rock Energy Systems |
Email: media@rockenergysystems.com | www.rockenergysystems.com
