our primeres are included PU/PVC primer,TPR primer,Rubber primer,EVA primer,oil leather primer,leather surface primer,etc. PP PE Prime -- permeat ... impurity. Rubber prime--Colorless transparent liquid, monocomponent rubber primer, used by mixing with PU or graft adhesive to ... before bonding, enhance the bonding strength of adhesive. TPR Primer-- Strong permeability, enhance the bonding strength of PU ...