In spite of the wide use of FRP in chemistry, metallurgy plant and so on, whereas FRP is with lower resistance to abrasion & pressure, thereby, the FRP employ FRP together with PVC in combination with the advantages of the two materials. Then the adhesion between the two materials is to be solved. Now the 8744 adhesive is proved a sound solution to it. The test result shows: the shear strength is up to 16 mpa between PVC/PVC at least, in the tests, the bar specimen will broke off at the bar of PVC instead of the adhesion area. what means in other word, the adhesion strength is beyond the maximum strength of PVC itself. Now 8744 is widely applied in FRP window manufacturing and other technique.