Visqueen Ultimate VOC BLOK is a flexible membrane manufactured using Visqueen’s advanced barrier technology. Ultimate VOC BLOK is suitable in brownfield applications that are affected by aggressive chemicals such as benzene, toluene, ethyl benzene and xylene (BTEX). Made to comply with current guidance on Volatile Organic Compounds (VOCs) and ground gases. VOC is the only membrane that does not require a protective layer. Available in a large roll format to minimise jointing and to speed up installation times. The membrane is flexible at low temperatures to limit stress on the membrane and to minimise cracking. Conforms in full to CIRIA C748 and BS8485:2015.