It is without adhesive, just with tamper evident function. Usually used to seal on plastic courier bag or envelope to make security bags / envelopes,  thus to avoid unauthorized opening and tampering during transportation.  It reveals hidden message such as “VOID OPEN” on lift security tape and transferred onto the security bag after removal is attempt. This permanent damage can’t be returned as before and shows obvious evidence of any unauthorized opening. It deters stolen and manipulation continuance.

The steps to use this kind of product is as below:

1.  heating the security film to apply to the closure part of plastic bags.

2.  coating hot melt adhesive on opposite side of plastic bag.

3.  composing a release film on the top of glue.

Or

1.  coating a strong bond adhesive on one side of the envelope closure.

2. composing the security film on the top of adhesive.

3. coating a strong bond adhesive on another side of the envelope closure.

4. composing a release film on the top of adhesive.

Features:

- It has excellent performance on PE or PP plastic courier bags.

- It is a quite nice way to protect your goods, reputation and profit.

-Color, size and hidden message can be customized.