We, TNC, are the manufacturer and distributor of various construction materials in Korea. We mainly produce; Butyl rubber sheets and tapes Welding blankets with acrylic, ceramic and vermiculite coating other relative miscellaneous products TNC is a construction material specialist with quality as a top priority and offers a variety of composite products and adherent solutions. Butyl rubber products produced by applying Korea's best-quality butyl compound technology to factories with ISO 9001 accredited facilities and their own labs are the main suppliers, while glass fiber products produced by OEMs through strict quality control are also supplied to the market. Based on the customer's trust to date Permafos Butyl Tape (Perma-Force Butyl Tape) Our long-established consistent mixing ratio is a completely different performance from low-cost products that reduce adhesive strength or impair permanent softness by over-setting the ratio of additives or fillers to increase volume. Powerful Watertight - South Korea-made rubber compound for reliable watertight performance Various applications - Rooftop waterproof sheets, shingles, wood, plastic, metal, glass, strong attachment for various applications. Semi-permanent life - Achieve semi-permanent life with the optimal blend ratio that minimizes the use of incremental fillers that reduce product performance and shelf life. Excellent weather tolerance - High-performance film layers and backing materials allow longer performance in extreme weather conditions. Choose from a variety of options - with a variety of color and width options to accommodate a wide variety of environments.