Heated jackets that keep diesel exhaust fluid (DEF) above its 12°F freeze point in totes, drums, and tanks — so fleets and equipment stay compliant and running through winter.
Diesel exhaust fluid freezes at about 12°F, and frozen or degraded DEF means SCR faults, derated engines, and downtime for any diesel fleet or equipment that runs on it. DEF also degrades when it gets too hot — so the goal is gentle, controlled warmth, not raw heat.
AG Heat DEF storage heaters wrap totes, drums, and tanks in even, thermostatically controlled heat that holds DEF safely above freezing without cooking it — keeping fluid usable and equipment compliant all winter.
Get a RecommendationDEF-Safe Warmth
Holds DEF above its 12°F freeze point without overheating and degrading it.
Full-Coverage Jackets
Even heat around the whole tote, drum, or tank — no cold spots.
Thermostatic Control
Maintains a safe, steady temperature automatically.
Insulated & Rugged
Retains heat and survives real yard and fleet conditions.
Multiple Sizes
Fits 55-gallon drums through 275 and 330-gallon totes and bulk tanks.
Wrap it snugly around the container for full contact and even, all-around coverage.
Fasten the closures so the heater stays firmly in place during use.
Plug into the correct voltage supply for your site.
Dial in your target temperature and let it bring the product up to temp and hold it there.
General steps — follow the instructions supplied with your specific unit. Questions? Ask us.
Wrap-around heaters that thaw, warm, and hold drum product at temperature.
Learn more →Freeze Protection
Why DEF freezes, what it does to your equipment, and how to keep totes, drums, and tanks above the freeze point all winter.
Read GuideFreeze Protection
Why things freeze, what it costs, and how to keep pipes, product, and cylinders working through the coldest months.
Read GuideSelection
Five questions that get you to the right heater fast — without oversizing, guessing, or ending up with something that almost fits.
Read GuideDEF freezes at about 12°F (−11°C). A DEF-rated heater holds the tote, drum, or tank above freezing without overheating the fluid, which would degrade it.
Totes, drums, and tanks — sized to the container and controlled so the DEF stays usable year-round.
Give us the container, the product, and the conditions. We’ll match you to the right solution — fast.
info@ag-heat.com · 801-244-9769 · Salt Lake City, UT