Pu edge sealing rock wool /glass wool sandwich board is made of two layers of high-quality color coated steel plate or other precision profiled metal plate,and core material is rockwool /glasswool strip, After rolling, the rockwool/glasswool after slitting is turned 90 degrees (making its fiber vertical to the upper and lower steel plates), High quality rock wool / glass wool is strongly bonded to the metal panel through high-strength, high adhesion and high fire-proof adhesive, and polyurethane is used to seal the edges on both sides to form a beautiful, flat, rigid and tough building plate.