1.选用耐黄PU胶 

    Choose yellowing-resisting PU adhesive. 

2.选用耐黄变型固化剂 

    Choose yellowing-resisting hardener. 

3.在粘合界面间的溢胶处涂上耐黄变覆盖液

  Brush yellowing resistant repairing agent to cover over-applied. 

4.选用耐黄性好的鞋材

  Choose  yellowing-resisting material of sole and upper.