18 Inch Aluminized Sleeves Radiant Heat and Molten Splash Protection 19 oz Aluminized sleeves are commonly used in combination with high-temperature gloves to protect from heat, sparks, and molten metal splash while allowing for better mobility than an aluminized jacket. Newtex’s aluminized sleeves are fabricated from Z-Flex Aluminized Fabric and manufactured in the United States at our Victor, New York headquarters. These are heat protection sleeves are intended for environments with ambient temperatures up to 200°F / 95°C. Aluminized sleeves and other aluminized clothing made from Z-Flex Aluminized Fabric reflect up to 95% of radiant energy and protect from high temperatures, flame, sparks, and molten metal splash