TOPSHIELD ® EST/EST (CAL)/EST (SC). Topshield ® EST is a single component, liquid applied, moisture cured, polyester, aliphatic, surface topcoat for waterproofing membrane systems. Topshield ® EST is 340 VOC, Topshield ® EST (CAL) is 250 VOC. Topshield ® EST(SC) is 100 VOCs/codes at the place of installation of product. Please use the correct product grade that complies with VOC ...