What kind of glue/adhesive is used to attach samples in magazines or flyers?

The rubbery, clean-removing blobs that provide a temporary adhesion?What kind of glue/adhesive is used to attach samples in magazines or flyers?
I don't know what it's called unless it's just dried silicone caulk or something similar, but you can buy it in various forms. ';Zots'; is one; it's sold as small dots of the stuff:


http://www.google.com/images?q=Zots+dots





There are other materials that provide temporary adhesion though in the form of tapes and temporary or ';repositional'; sprays, glues like Aleene's Tack it Over and Over:


http://www.google.com/images?q=Aleene's+鈥?/a>


etc... and even rubber cement if it's applied only to one surface then allowed to dry before pressing to the second surface --a technique that also works with some other things.





HTH,





Diane B.