I don't know what it means in english but in german it's "Frischkleber". You can use it to get more speed on your rubber.
http://www.tischtennis.biz/vulcan-combi-angebot-repeat.html?sid=72c4df6d3fd50b23288449122e0d565f
I didn't test the product from this website but I could test another one and...