Unlike two-piece induction wads, which have a backing (usually pulpboard or foam) and a separate seal, single-piece wads are made of one integrated layer. They typically consist of:
Heat-sealable foil layer (usually aluminum)
A polymer (sealing) layer matched to the container material (e.g., PE, PP, PET, or glass)
Optional printing (e.g., "Sealed for your protection")
Price:
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