Frequently Asked Questions — Aluminized Fiberglass Fabric

What makes aluminized fiberglass fabric different from standard fiberglass?

Standard fiberglass welding blankets absorb heat and block sparks and spatter. Aluminized fiberglass fabric does that on the fiberglass side (rated to 1000°F) while the aluminum coated side actively reflects radiant heat away from the protected surface — rated to 500°F on the aluminum face. This dual-sided capability makes it the right choice for applications where both heat absorption and radiant heat reflection are needed, such as heat reflective curtains, vapor shields, and removable insulation pads.

Which side faces the heat source?

For most welding and heat protection applications, orient the fiberglass side toward the heat source — it handles up to 1000°F and provides abrasion resistance. The aluminum coated side faces away from the heat source and reflects radiant heat. For applications where radiant heat reflection is the primary requirement (such as insulation pads and vapor shields), the aluminum side faces the heat source and handles up to 500°F.

What are the most common applications?

Heat reflective curtains and shields, flange covers, vapor shields, removable insulation pads, and any application requiring both heat resistance and radiant heat reflection. Also used in industrial settings where resistance to solvents, acids, and alkali is required alongside thermal protection.

Is this material chemical resistant?

Yes. The aluminized fiberglass fabric is resistant to most solvents, acids, and alkali. It is not resistant to hydrofluoric acid.

What widths and lengths are available?

Available in 40 in and 60 in widths, in 50-yard (150 ft) rolls. The 40 in roll is suitable for standard curtain-height installations; the 60 in roll provides broader surface coverage.

What are the material specifications?

21 oz per square yard (18 oz base fiberglass), 35 mil thickness, 20/14 construction, tensile strength 200/100 lbs per inch. Color is silver on the aluminum side and off-white on the fiberglass side.

How does this compare to silica welding blankets for high-heat applications?

Silica welding blankets are rated for heat treating and stress relief applications up to 1800°F with direct continuous heat exposure. Aluminized fiberglass is rated to 1000°F on the fiberglass side and adds the radiant heat reflection capability that silica doesn't offer. For heat treating and furnace work, silica is the correct choice. For applications requiring radiant heat reflection, insulation, and vapor shielding, aluminized fiberglass is the better fit. See our Silica Welding Blankets for comparison.

What other welding blanket materials do you carry?

We carry carbon fiber felt, heat cleaned fiberglass, silica, acrylic coated fiberglass, and silicone coated fiberglass welding blankets and rolls. Browse the full Welding Blankets & Rolls collection for all options.

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