Aluminum foil is the most versatile packaging material on the market today. No other material can claim to be the lowest cost absolute barrier to light, moisture and oxygen. Laminated to paper or plasitc films for strength, foil provides lighter, less expensive protection to foods, medicines, and other products that would be damaged by the environment.  Here are some of the benefits of using foil:

• Formable: Great dead-fold characteristics, for good performance on high-speed packaging lines.
• Corrosion Resistant: Natural oxide coating reduces corrosion.
• Impermeable: 0.001-inch foil and thicker is impermeable to moisture and oxygen; 0.00035-inch has a water vapor transmission rate of 0.02 grams or less per 100 square inches; vapor transmission drops to zero when 0.00035-inch foil is laminated to an appropriate film. 
• Adaptable: Can be combined with virtually any other flexible packaging material.
• Not Absorbent: Will not absorb water or other liquids.
• Opaque: Transmits no light.
• Sealable: Excellent dead-fold and adhesion to a wide variety of compounds.
• Non-Soluble: Will not combine with foods and other substances.
• Tasteless, Odorless: Imparts no detectable taste or odor to products.
• Hygienic: Sterile when heat-treated in production. Smooth metallic surface sheds most of the contaminants and moisture of sterilization.
• Non-Magnetic: Provides excellent non-magnetic shielding.
• Good Conductor: Good for sealing by heat and induction.