Items with PU foam on the inside and glass fibre plastic on the outside are referred to as sandwich products. With a traditional chemical process, PU foam does not adhere to the interior of other plastic, resulting in an unsatisfactory and uneven result as well as additional chemical expense. Eltech Surface System will significantly reduce adhesion issues without the use of chemicals. Ozone that is concentrated thanks to our method blows into the shell and spends some time there. It then solidifies and sticks to the inside of the shell before being sucked out once more.