Kabu-BV is a blind closure made of a solid rubber core with a soft yellow duroplast elastomer coating and stainless steel press flanges. This gas- and water-tight blind closure is used for Kabuflex® R plus pipes for building entries. The advantage is the soft surface, which creates a secure seal against gas and water pressure. Due to its very good adhesive properties, the Kabu-BV blind closure sits securely in the pipe, against pressing water and gas. Installation can be carried out successfully without special tools (torque wrench) using the visual contact indicator (yellow bead) on the press flange edges. To ensure secure sealing, it is important to ensure that the inner seal is in the area of the unfinished floor or screed or the Kabu-Seal outer seal.