English to German Tech/Engineering Chemistry; Chem Sci/Eng

the expression is in the following sentence:
Frequently, during tire retreading, organic solvents are emitted into the atmosphere. To solve this problem, xxxthe companyxxx developed an innovative idea: using a cushion with ***built-in tack***, eliminating solvents and cement.

In the next sentence it is mentioned that the US have already granted a patent. So I looked for it in the Internet and found the following:

The adhesive cushion layer compositions of the present invention have a ***built-in or inherent tack*** and thus are solventless, that is, substantially free of solvent inasmuch as they generally have five parts by weight or less, desirably three, two, or one parts by weight or less, and preferably nil, i.e., completely free, of any volatile organic compounds (VOC), per 100 parts by weight of rubber (phr).

What is this tack? Is it a "Nagel", "Stift", "Reißzwecke" or something different and "klebrig"?
Thank you for your help.