On an insulating glass line, the sealant dryer is where the plan hits the shop floor. With triple glazing, the stack is taller and the desiccant load is heavier. If the heat profile is too slow or uneven, moisture gets trapped, adhesion falls off, and you end up in rework for a week. You also get warranty headaches from edge stress that only shows up after cutting and assembly.
What matters under the hood
We built this triple glazing sealant dryer around medium-wave infrared emitters in a quartz envelope. The choice is simple: fast response and predictable emissivity, especially on coated glass. The module runs 12–18 kW per lane, with 240/480 V options, and uses a standard 12-pin connector so it drops straight into common OEM frames. Temperature is controlled zone by zone, so the outer lites don’t get cooked while the inner spacer hits the sealant cure window. The payoff is a uniform thermal field that keeps thermal stress in check during heating.
Why it holds up on triple glazing
Triple glazing needs heat that penetrates consistently without scorching the sealant or bowing the lites. This dryer brings the sealant up to temperature fast, shortens dwell time, and frees the press for the next run. That means more units through the door, fewer rejects from incomplete curing, and less gas burned per piece. The design also supports stress relief on heat-treated units, which helps prevent spontaneous fracture after cutting and handling.
The practical details
Installation is straightforward on most insulating glass machines, but line speed and glass emissivity will move the setpoint. On low-emissivity coatings, plan on a slightly higher target temperature to compensate. Keep the emitter-to-glass gap inside the specified window, and make sure airflow is dialed in to control convection. With setup done right, we’ve seen units run 5,000+ hours with less than 5% output drop.