Select matte gold heat shrink capsules to form a tamper-evident seal that adds an elevated look to your glass bottles. The gold heat shrink capsules are composed of PVC, forming barriers against grease, oil, acid, and oxygen when sealed. Use a heat gun to apply the gold heat shrink capsules quickly and easily, and pull the gold tear tab to create a circular tear along the tamper-evident seal to remove these heat shrink capsules after application.