3M™ Adhesion Promoter K520UV, 4 oz Bottle, 24 Bottle/Case. 3M™ Adhesion Promoter K520UV is an automotive adhesion promoter designed to enhance the adhesion of 3M™ Acrylic Foam Tapes and 3M™ Acrylic Plus Tapes to challenging polyolefin-based substrates like thermoplastic olefins (TPO), polypropylene (PP) and ethylene propylene diene monomer (EPDM) rubber.