Usage: Can be heat sealed to plastic, paper, glass or metal containers. And used for yogurt, juice, ... aluminum foil lids:1. Usage: Can be heat sealed to plastic, paper, glass or metal containers. And used for yogurt, juice ... : From 30 to 45 micron4. Heat Seal Materials: PS/PP/PVC/PET/PE plastic materials, glass materials and also special protective lacquer available5. Specification ...