IN A WORLD OF SHORTCUTS, WE DON'T™
Reflective Strip Curtains
Two-Layer Aluminized Strip Curtains That Send Radiant Heat Back Into the Oven Instead of Into Your Building
Reflective strip curtains from Steel Guard Safety combine an aluminized fiberglass face with a 32 oz silicone coated fiberglass backing. The aluminized layer hangs toward the heat source and reflects radiant energy back into the oven, while the heavy silicone face outward takes the abrasion from parts and personnel moving through the opening.
An uncovered oven door loses heat two ways at once. Convective loss carries hot air out of the opening, and radiant loss sends energy straight through the doorway in a line of sight. A single-layer curtain addresses the first. The HTS-2000 addresses both, which is why it is the build most of our customers specify. For the full range of materials, see our High Temperature Strip Curtains line.
What the Reflective Layer Does
Radiant heat transfer scales with the fourth power of temperature, which means it goes from a minor contributor at low temperatures to the dominant loss mechanism as an oven gets hotter. At a 400°F oven mouth, a significant share of what escapes is radiant energy leaving through the open doorway, and no amount of ordinary fabric stops it — the fabric simply absorbs it, heats up, and re-radiates it into your building.
A low-emissivity aluminized face does something different. It reflects that energy back toward the source before the assembly absorbs it, which produces three effects worth measuring:
- Lower energy consumption, because the oven holds temperature with less input
- Faster recovery and preheat, because less heat escapes during door cycles and loading
- Cooler ambient temperature at the operator station, because the radiant load reaching the aisle is reduced
Aluminum Foil, Not Metallized Film
Most reflective industrial fabrics use an aluminized polyester or Mylar film laminated to a substrate. That construction is inexpensive and reflects well, but the film itself typically begins to degrade somewhere between 400°F and 450°F — below the rating of the fabric behind it, and below the temperature many ovens run.
The HTS-2000 uses an aluminum foil laminate bonded with a high temperature adhesive instead. There is no polymer film in the assembly. Nothing to haze, outgas, or delaminate, and the reflective face holds 482°F continuous with 518°F short term capability.
That distinction matters most because of where the reflective layer sits. It faces the heat source, which is the hottest position in the assembly. A film-based reflector in that position is the first thing to fail, and when it fails it does so quietly — the curtain keeps hanging and looking correct while the radiant barrier has stopped working.
Which Way It Hangs
Aluminized face toward the heat source. Stopping radiant energy before it enters the assembly keeps the silicone backing, the stitching, and the outer face all running cooler, which extends service life across the whole curtain.
The one constraint is the reflective layer’s own limit. You cannot hang a 450°F reflective face into a 600°F oven opening no matter what the physics says about where reflectors belong — material limits override thermal optimization. Ours holds 482°F, so tell us your operating temperature and we’ll confirm the orientation and the build.
Two further conditions determine whether a reflector earns its keep. It needs a surface that stays reasonably clean, because tar, soot, and overspray will take a highly reflective face to a dull absorbing one within days. And in panel-wall applications it needs an air gap; a reflective layer laminated flat against insulation with no standoff contributes very little. In a strip curtain the gap is inherent, since the curtain hangs free in the opening.
Running Above 480°F?
Choose our silicone coated fiberglass build instead. The aluminized layer is the limiting component on the HTS-2000 at 482°F, and it is the layer facing your heat. A single-layer silicone coated curtain holds 500°F and will outlast a reflective build at the top of that range. You give up the radiant reflection, but you get a curtain matched to the temperature.
Where Reflective Strip Curtains Are Installed
Conveyor oven entrances and exits. Continuous lines lose heat at both ends all shift. This is where the energy case is easiest to make, because the loss is constant rather than intermittent.
Walk-in batch and cabinet oven doors. Doors stand open while a cart or rack is loaded, several times a shift, and a 400°F oven dumps a great deal of energy in those minutes. The curtain hangs inside the door frame so the door still closes over it.
Paint bake and powder cure ovens. Holding cure temperature stable matters for finish consistency, not just for the utility bill.
Heat treat cure-down. Controlling the rate of temperature loss is part of the process rather than an efficiency question.
Operator stations near hot openings. Where the complaint is that it’s unbearable to work next to the oven, the radiant load reaching the aisle is usually the cause, and reflecting it back is the direct fix.
Where Reflective Pays Off
Every application below runs inside the HTS-2000’s temperature range. What separates them is how much radiant energy the opening is actually losing, which depends on duty cycle, opening size, and whether the process keeps the reflective face clean.
| Application | Typical Temperature | Opening Exposure | Reflective Payoff |
|---|---|---|---|
| Conveyor oven entrance and exit | 300–450°F | Continuous, all shift | Strongest — loss never stops |
| Walk-in batch oven door | 300–450°F | Intermittent, several times per shift | Strong — large opening, heavy loss per cycle |
| Powder coat cure | 350–450°F | Continuous | Strong — top of the temperature range |
| Paint bake | 250–400°F | Continuous or intermittent | Strong — also stabilizes cure temperature |
| Operator station beside a hot opening | Any in range | — | Strong — comfort is the driver, not the utility bill |
| Adhesive and composite cure | 250–400°F | Intermittent | Moderate |
| Heat treat cure-down | Varies | Continuous | Moderate — rate control matters more than savings |
| Drying ovens | 150–400°F | Continuous | Moderate — less radiant energy at lower temperatures |
| Screen print and textile dryers | 300–350°F | Continuous | Moderate — small openings limit total loss |
| Heavy overspray or volatile processes | Any | — | Poor — fouling destroys reflectivity in days |
| Anything above 480°F | 480°F+ | — | Not suitable — use our silicone coated build |
Two patterns run through this table. Radiant loss scales with the fourth power of temperature, so the hotter the opening the more the reflective layer returns — a 450°F powder cure oven loses far more radiant energy than a 200°F dryer. And a reflector only works while it stays reflective, so any process that coats the face with soot, tar, or overspray will need regular cleaning to keep the layer earning its cost.
Additional Information:
Construction
- Two bonded layers — 17 oz aluminized fiberglass face, 32 oz silicone coated fiberglass back, roughly 49 oz finished
- Stainless steel thread throughout. Fiberglass and PTFE threads cap at 500–600°F, which would put the thread at the same limit as the fabric
- 1000°F E-glass base fabric under both layers, with the coatings determining service rating
- Grommets on 2″ centers to match standard strip door mounting hardware, with universal galvanized mounting for face mount, eave, wall, or suspended installation
- Individual strips are replaceable — replace what wears rather than the whole curtain
- Built to any opening, from 3′ x 4′ batch oven doors and conveyor slots to openings 10′ wide and larger
Overlap and Strip Width
Almost every strip curtain overlap guide is written for thin PVC, and those numbers don’t transfer to coated fabric. At full overlap someone is pushing through two layers of heavy coated fiberglass. Grommets are punched on 2″ centers to match standard strip door mounting hardware, so every grommet mates with a mount hole and strip spacing is set on a 2″ grid. We build three configurations:
- Full overlap — 8″ strips with 2″ of overlap on each side. Complete double coverage and the best heat containment. Takes the most effort to push through.
- Mid overlap — 6″ strips with 1″ of overlap on each side. Same strip count and the same hardware as full overlap, using narrower strips. Noticeably easier to walk through, still a real barrier.
- Butt joint — no overlap, strips meet edge to edge. Lowest resistance and best visibility, right for continuous conveyor passthrough where drag would mark the finish.
Full and mid overlap use the same number of strips, so moving between them changes only the fabric width and the amount of coverage — the mounting hardware and strip count stay the same.
Contact one of our experienced sales reps at 1-800-347-8368 or request a quote online. Send us the opening dimensions, your operating temperature, and what passes through, and we’ll spec the build.
HTS-2000 Material Specifications
| Property | Reflective Face | Backing Layer |
|---|---|---|
| Material | Aluminized fiberglass, aluminum foil laminate | Silicone coated fiberglass |
| Fabric weight | 17 oz/sq yd | 32 oz/sq yd |
| Thickness | — | 0.035″ |
| Base fabric | E-glass, 1000°F | E-glass, 1000°F |
| Continuous service temperature | 482°F / 250°C | 500°F |
| Short term | 518°F / 270°C | — |
| Color | Silver | Red |
| Reflective | Yes | No |
Assembly Rating
| Property | Value |
|---|---|
| Continuous service temperature | 482°F |
| Short term | 518°F |
| Limiting layer | Aluminized foil laminate |
| Base fabric limit | 1000°F E-glass |
| Finished weight | Approximately 49 oz/sq yd |
| Reflective orientation | Aluminized face toward heat source |
The assembly is rated to its limiting layer, not its base fabric. The E-glass substrate under both layers holds 1000°F, but the aluminized foil laminate is the first component to fail at 482°F, so that is the number the curtain carries. Manufacturer data sheets for both materials are available on request.
Curtain Construction
| Component | Specification |
|---|---|
| Thread | Stainless steel |
| Grommet spacing | 2″ centers |
| Strip widths | 6″ or 8″ |
| Overlap options | Full 50%, Mid 33%, or butt joint |
| Mounting hardware | Universal galvanized — face mount, eave, wall, or suspended |
| Maximum size | No limit — built to opening |
| Replacement strips | Available individually by width and length |
It depends on your operating temperature, how large the opening is, and how often it’s in use — a continuously open conveyor throat behaves very differently from a batch oven door that opens six times a shift. Radiant loss scales with the fourth power of temperature, so the hotter the oven and the larger the opening, the more the reflective layer returns. Send us your opening dimensions and set point and we’ll walk through the specifics rather than quoting you a percentage that may not apply.
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A standard silicone coated curtain blocks convective loss — the hot air moving through the opening. A reflective curtain does that and adds an aluminized face that returns radiant energy to the source before the assembly absorbs it. The trade is 18°F of continuous rating, since the aluminized layer limits at 482°F against silicone’s 500°F, and a higher price. If your problem is the utility bill or operator comfort, choose reflective. If it’s strips wearing out from traffic, the standard build is more durable per dollar.
Toward the heat source. Stopping radiant energy before it enters the assembly keeps the backing, stitching, and outer face all running cooler. The caveat is that the reflective layer has its own temperature limit — ours is 482°F — and you cannot hang a reflective face into an opening hotter than the reflector can survive, regardless of what the physics says about optimal placement.
Because those numbers usually describe the base fabric rather than the reflective layer. E-glass fiberglass holds 1000°F, and our base fabric does too. But the aluminized laminate on top of it limits at 482°F, and that’s the first thing to fail. Ask any supplier for the standalone maximum operating temperature of the reflective layer, separate from the base fabric, and compare those answers
Aluminum foil, laminated with a high temperature adhesive. Many reflective industrial fabrics use aluminized polyester or Mylar film, which is cheaper but typically degrades between 400°F and 450°F. Ours has no polymer film in the assembly, so there is nothing to haze, outgas, or delaminate.
No. At 500°F you’re above the aluminized layer’s continuous rating, and it is the layer facing your heat. Use our silicone coated fiberglass build instead — it holds 500°F and will last considerably longer at that temperature. You lose the radiant reflection but gain a curtain matched to the conditions.
Watch the aluminized face. Reflectivity degrades before the curtain fails structurally, so a curtain can hang correctly and look serviceable while the radiant barrier has stopped doing anything. Hazing, dulling, or discoloration of the reflective surface is the signal. Soot, tar, and overspray buildup produce the same effect without degrading the material — in that case cleaning restores it.
Less well. A reflective surface only works while it stays reflective, and a coating of soot, tar, or overspray will take a highly reflective face to an absorbing one within days. If your process produces heavy volatiles or overspray, the reflective layer will need regular cleaning to keep earning its cost, and a standard or non-stick build may serve you better.
Stainless steel throughout. Fiberglass and PTFE threads cap at 500–600°F, which would put the thread at the same limit as the fabric.
Yes. Strips wear at different rates depending on position, so replacing the few that have degraded beats replacing the whole curtain. Order by strip width and length.
Any opening. We regularly build 3′ x 4′ batch oven doors and conveyor slots as well as openings 10′ wide and larger. Every curtain is made to your dimensions in our own facility.
