Keeping the Rain Out of Your Outdoor Infrared Heaters
Outdoor infrared heaters live a rough life. They go from freezing rain to searing heat in a matter of minutes. Now, when you see an “IP66” rating, it’s easy to assume the whole unit is just a waterproof box. But here’s the thing: the real danger isn’t the shell. It’s where the wires go in. If that lead-wire seal gives up, moisture sneaks into the terminals. Mix that water with high heat, and you’ve got a recipe for a short circuit. Not exactly what you want when you’re trying to keep guests warm.
The Problem with “Cheap” Seals
A lot of standard potting compounds just can’t hack it here. Infrared heaters put out intense radiant heat, and some of that heat travels right back down the wiring. Cheap sealants basically bake. They get brittle, they crack, and suddenly you have tiny pathways for humidity to crawl inside. Once that happens, the insulation starts to carbonize. We see this all the time with consumer-grade builds—the sealant just isn’t designed to move and stretch with the metal chassis as it heats up and cools down.
Doing it the Right Way
We handle this with a multi-stage process to make sure those wires stay protected. We pair high-temp silicone gaskets with industrial epoxy resins that don’t shrink while they’re curing. The goal is a tight, airtight seal. We also make sure the wire jackets are stripped and crimped using high-nickel terminals. Why? Because low-grade solder will just burn out under a heavy, continuous load. Oxidation is the enemy here. Our process keeps the seal flexible enough to handle vibrations, but tight enough to stop a pressurized jet of water in its tracks.
One Thing to Watch Out For
There is a trade-off, though. When you seal something this tightly, you’re essentially trapping heat. Since there’s no airflow around those electrical connections, the chassis needs to be able to breathe. If the area around the wire entry gets too hot—beyond what the resin can handle—the seal will eventually soften. A quick tip: check your mounting orientation. You want to make sure heat isn’t pooling right where the wires exit. A little bit of planning during installation goes a long way in making these units last for years.