IN A WORLD OF SHORTCUTS, WE DON'T™
HT-4000 Aluminized Silica Cloth Curtain
Radiant Heat Reflective Curtain Rated to 2000°F Constant for Furnace & Foundry Applications
The Steel Guard Safety HT-4000 is an aluminized silica cloth curtain that combines the extreme temperature resistance of 96% pure amorphous silica with a special aluminum coating for superior radiant heat reflection. This radiant heat reflective curtain is rated for continuous service at 2000°F and intermittent exposure up to 3000°F — and is the right choice when heat containment requires not just blocking heat transfer, but actively reflecting radiant heat away from workers, equipment, or adjacent processes.
Like the HT-3000, the HT-4000 is sewn with extra high heat Teflon-coated thread rated to withstand temperatures up to 3000°F, with grommets set every 12 inches on center. It is available with chain bottom for draft stability, optional reinforcement, and compatible with our track and roller system for flexible installation.
HT-4000 Specifications
• Material: High silica yarn (96% pure) with special aluminum coating on one side
• Color: Silver/aluminum face
• Temperature Rating: 2000°F constant, 3000°F intermittent
• Details: Sewn and hemmed with extra high heat Teflon-coated thread. Grommets set every 12 inches on center. Chain bottom and reinforcement available
• Uses: Radiant heat reflection for foundry furnaces, coke ovens, heat treating processes, and industrial cooling process protection
• Insulated: No
• Reflective: Yes — aluminum coating reflects up to 95% of radiant heat
• Certifications: NFPA-701 Certified Flame Retardant
When Radiant Heat Reflection Matters
In high temperature industrial environments, radiant heat is often the primary threat to worker safety and equipment longevity near furnace or oven openings. A curtain that blocks conductive heat transfer but absorbs and re-emits radiant energy may still allow significant heat exposure on the protected side. The HT-4000’s aluminized coating reflects radiant heat back toward the source rather than absorbing it, making it the preferred choice for:
• Foundry and coke furnace openings where radiant heat exposure is intense
• Maintaining cooling processes adjacent to high-heat production areas
• Protecting workers from radiant heat during furnace access operations
• Applications where the HT-3000 silica base provides adequate temperature resistance but additional reflectivity is needed
For molten splash environments, see the HT-5000 Silicone Quilted Molten Splash Curtain. For the base silica option without reflective coating, see the HT-3000 High Silica Cloth Curtain. Browse the full High Temperature Curtains line or return to Industrial Heat Resistant Curtains. Request a quote at 1-800-347-8368 or online here.
The aluminum coating on the HT-4000 reflects up to 95% of radiant heat back toward the source. This makes it significantly more effective than uncoated silica or fiberglass curtains in environments where radiant heat — as opposed to convective or conductive heat transfer — is the primary exposure mechanism. The reflective face should be oriented toward the heat source for maximum performance.
The HT-4000 shares the same temperature rating as the HT-3000: 2000°F constant and 3000°F intermittent. The aluminum coating does not reduce the temperature resistance of the high silica base material.
The base material and temperature ratings are identical. The HT-4000 adds a special aluminum coating on one side for radiant heat reflection. The HT-3000 is appropriate when thermal blocking and insulation are the primary needs. The HT-4000 is the upgrade when you additionally need to reflect radiant energy away from the protected side — particularly for worker protection or for maintaining lower ambient temperatures in areas adjacent to the heat source.
Yes — all Steel Guard Safety high temperature curtains are custom built to your specifications. Contact us at 1-800-347-8368 or request a quote online for dimensions, layer count, mounting hardware, and installation configuration.
