sheet reynolds wrap heavy duty aluminum foil

Aluminum foil is a thin, pliable sheet of aluminum metal, typically 0.016 inches (0.41 mm) thick in standard grades and slightly thicker in heavy-duty variants. Heavy-duty aluminum foil specifically refers to foil with increased thickness and enhanced durability compared to standard varieties, providing superior strength and resistance to tearing during food wrapping and cooking applications. The material is produced through a rolling process that flattens aluminum ingots into increasingly thin sheets, and it features a characteristic bright side (polished during manufacturing) and a matte side (formed during the final rolling pass). Aluminum foil conducts heat efficiently and provides an impermeable barrier to light, oxygen, and moisture, making it suitable for food storage and cooking purposes.

Heavy-duty variants are engineered for applications requiring greater puncture resistance and handling durability, such as wrapping large food items, lining baking surfaces under high-heat conditions, and extended storage periods.

Aluminum foil serves multiple functions in contemporary cooking and food preservation. It is commonly used to wrap proteins, vegetables, and composite dishes for even heat distribution and moisture retention during baking and grilling—a technique known as "en papillote" when parchment paper is substituted, or simply foil-packet cooking. The material lines baking sheets and cake pans to prevent sticking and facilitate cleanup, insulates food during transport and storage, and protects delicate surfaces or areas prone to over-browning during extended cooking times. Heavy-duty variants are preferred for high-heat grilling, wrapping whole roasted items, and situations requiring structural integrity. Aluminum foil is also used to create makeshift cooking vessels and to shield food from direct heat sources.