SelfSeal NoMistakes self-adhesive lamination ensures perfect, safe laminating for heat sensitive materials as these cold sheets work without a machine. Documents can be accessed for up to 24 hours after the initial seal to reposition your item or smooth out bubbles & wrinkles in the laminate. After 24 hours, the laminating seal becomes permanent to provide durable protection for your important or frequently used items. Gloss. Laminator Supply Type: Cold Lamination; Supply Format: Pouch; Suggested Applications: Flash Card; Photo Instruction Sheet; for Use With: No Machine Required.