Tamper Evident Containers

Tamper evident packaging helps consumers identify whether or not a container has been opened prior to purchase. Tamper evidence is vital for a number of industries, from food and beverages to industrial chemicals and pharmaceuticals. While using tamper evident closures does not make a product tamper-proof, it can give customers peace of mind that the products they are buying have not been altered after leaving the manufacturer.

SKS carries a wide variety of products that can be used to create a tamper evident container. Choose from shrink bands, tamper evident closures, caps with plastisol liners and induction liners.

Quick Reference

Use the chart below to compare the benefits and disadvantages of our tamper evident packaging options

		Shrink Bands	Tamper Evident Caps	Plastisol Lined Caps	Induction Lined Caps
Price		$	$$	$$	$$$
Sizes Offered		See compatibility chart	18/415, 28 mm	38 mm - 82 mm	33/400, 38/400 & 45/400
Equipment Required		Heat Gun or hair dryer	none	hot-fill product	Induction Sealing Machine
SKS' Compatible Container Materials	Plastic	X	X		X
	Glass	X	X	X	X
	Metal	X
Advantages		Inexpensive Compatible with a variety of containers & materials	No equipment needed Tampering is easily observed	Tampering is easily observed Allows for longer product shelf life	Provides a leakproof, hermetic seal Guaranteed tamper evidence with proper equipment use
Disadvantages		Can sometimes be removed without breaking Application can be somewhat time consuming	Few neck finish sizes offered Container must have lip to hold ring, otherwise cap can be removed intact	Product must be properly heated and cooled Most time consuming method	Expensive Induction sealing equipment needed for proper seal
Click to Buy		Shrink Bands	TE Caps	Plastisol Lined Caps	Induction Lined Caps

Shrink Bands

Shrink bands are an economical way to offer customers tamper evident containers. Our tamper evident shrink bands are made from 0.2 mm thick PVC plastic and are perforated for easy removal. Once removed, the shrink band cannot be reapplied to the container. Shrink bands are easy to use: simply slide the band over your container and cap and apply even heat until the band has shrunk snugly around your product.

If you are unable to find a shrink band on our website that is compatible with your container, we can help! SKS can produce custom shrink bands and sleeves in unique sizes, colors and materials to suit your needs. View our custom shrink band services page to learn more. For tips and further instruction, visit our shrink band information page.

The most important thing to remember when using shrink bands is to select the correct size for your container. This eliminates the possibility that the band can be removed intact. We stock an extensive selection of shrink bands in several colors that are compatible with many of our containers. To find a compatible shrink band for your container:

From the container's product page, click on "Add-ons" to the right of the item and a dropdown menu will display any compatible shrink bands
From the container's product page, click on "Add-ons" to the right of the item and a dropdown menu will display any compatible shrink bands
View our Shrink Band Compatibility Chart, which lists each shrink band stock number along with all corresponding containers

Buy Shrink Bands

Buy Tamper Evident Caps

Each of these ribbed plastic caps features a frangible ring attached to the bottom of the cap skirt. A compatible bottle will have a lip below the bottle's neck finish. The ring will break away from the cap and remain on this lip when the cap is unscrewed. Once this connection has been broken, the components cannot be reattached.

Buy Plastisol Lined Caps

These metal caps feature a ring of plastisol material applied where the lid and container opening would meet. When heated to proper temperatures, the plastisol liner will soften and melt around the container's opening. As it cools, the plastisol solidifies and forms an airtight seal between the cap and container.

Often, these caps include a raised, tamper evident button in the center. As the container cools, the internal pressure is reduced and causes the button to depress. When the cap is removed, the pressure inside the container is neutralized and the button pops back up. A properly sealed, unopened container will have a flat button and will be difficult to open - the broken seal will produce a loud "POP."

If the button is raised at the point of purchase and the cap can be removed silently, the container has already been opened. Because these closures must withstand high heat in order to function properly, it is recommended that they be used with glass containers only.

Induction Lined Caps

Induction lined caps provide superior leak protection and help ensure product freshness with a hermetic seal. The induction liners have several layers: pulpboard or PE foam, wax, foil, and a polymer coating. When passed through an induction machine, the heated foil melts the wax and polymer, creating a hermetic seal with the container when solidified. Once the liner has been peeled off the container, it cannot be reapplied. It also leaves a residue around the container opening, indicating that the seal has been removed.

An induction sealing machine must be used in order to create an airtight seal. For more information or to purchase an induction machine, click here.

The liners of our stock induction caps are backed with polystyrene foam and are printed with the text, 'Sealed for Your Protection.' These caps are compatible with polyethylene (HDPE & LDPE), polystyrene, PET, PVC & glass containers.

White Ribbed Induction Lined Caps

Container Compatibility

Browse the chart below to find compatible containers for each tamper evident cap style.

Tamper Evident Cap	Size	Compatible Containers
Black TE Caps w/ Orifice Reducers White TE Caps w/ Orifice Reducers	18/415	5 ml - 100 ml Amber Glass Euro Dropper Bottles 5 ml - 50 ml Blue Glass Euro Dropper Bottles 5 ml Amber Glass Bottles
Black TE Caps	18 mm	50 ml Clear PET Nip Bottles
Black TE Glass Dropper Caps	18/415 (62 mm pipette)	10 ml Amber Glass Euro Dropper Bottles 10 ml Blue Glass Euro Dropper Bottles
Black TE Glass Dropper Caps	18/415 (82 mm pipette)	30 ml Amber Glass Euro Dropper Bottles 30 ml Blue Glass Euro Dropper Bottles
Black TE Caps w/ Pouring Inserts	28 mm	100 & 250 ml Amber Glass Flasks
Gold Metal Plastisol Lined Caps w/ Buttons White Metal Plastisol Lined Caps w/ Buttons Printed Gold Plastisol Lined Caps w/ Buttons Silver Metal Plastisol Lined Caps w/ Buttons	70 G (70/450)	16 oz Clear Glass Mason Jars 16 oz Clear Glass Mayo Jars 8 oz Clear Glass Jelly Jars
Black Metal Plastisol Lined Lug Caps	58 mm	4 & 6 oz Clear Glass Hexagon Jars 6 oz Clear Glass Oval Hexagon Jars 6 oz Clear Glass Square Jars
Black Metal Plastisol Lined Lug Caps	63 mm	9 oz Clear Glass Hexagon Jars 9 & 12 oz Clear Glass Oval Hexagon Jars 9 oz Clear Glass Square Jars
White Ribbed Induction Lined Caps	33/400	60 cc Natural HDPE Pharm Rounds 75 cc White HDPE Pharm Rounds 2 oz Clear PET Square Bottles 1 oz Clear Glass Paragon Jars 1 oz Clear Glass Jars 1/4 & 1/2 oz Natural Polypro Jars 1/4 & 1/2 oz White Polypro Jars 1/2 oz Clear, Blue, Amber, & Green PET SS Jars 32 oz Clear Glass & Amber Glass Round Bottles 60 cc Amber Glass Pharm Rounds 1 oz Clear Glass Pharm Rounds 1/8 & 1/4 oz White Polypro Thick Wall Jars 4 oz Clear Glass Square Bottles 1/8 & 1/4 oz Clear Styrene Jars 2 oz Clear PET Square Bottles
	38/400	120 cc Natural HDPE Pharm Rounds 120 cc White HDPE Pharm Rounds 120 cc Amber Glass Pharm Rounds 4 oz Clear PET Square Bottles 8 & 12 oz Natural LDPE Cylinders 2 oz Clear Glass Paragon Jars 1/2 & 1 Gal White & Natural HDPE Jugs 1 oz Clear Glass Jars 1 oz Clear, Blue, Amber, & Green PET SS Jars 1/2 & 1 Gal Clear Glass & Amber Glass Jugs 1 Gal Natural HDPE F-Style Jugs
	45/400	250 cc Amber Glass Pharm Rounds 250 cc Natural HDPE Pharm Rounds 150, 200 & 250 cc White HDPE Pharm Rounds 8 oz Clear PET Square Bottles

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