CTS Tank seals for internal floating roofs and external floating roofs One of the most important aspects in controlling the emissions from external floating roof tanks is the seal design. A seal for any external floating roof will have to withstand the usually harsh environmental conditions at the tank farm and the stored product over long periond of time. Any defect in a seal may result in environmental damage from emissions, product loss and product contamination. In extreme cases a malfunctioning seal may even cause fire hazards. CTS has extensive experience in design and installation of these tank seals for external floating roof tanks. We design every seal individually for the tank it has to be fitted on. This wil result in a truly custom built seal, that wil be compatible with all specific conditions. Our tank seals are engineered to last!