UVTLIN® is a thermal insulation material obtained by grafting UV-GRP Sheet, an ultra-violet thermal layered insulation to HITLIN, an existing E-glass fiber product. Hitlin which is the brand name of a product developed by Sewoon T&S for the purpose of using thermal and cold insulation materials. It is a product that improves workability by not only resolving corrosion under insulation (CUI) but also by remarkably shortening the construction time by manufacturing UV-GRP sheets instead of aluminum sheet on HITLIN, which has excellent thermal insulation.