Pecora BC-158 is a one-part gun grade caulking, sealing and glazing compound formulated from virgin butyl rubber. Because of the well-known durability of butyl rubber, BC-158 provides a long-lasting durable seal between joints of similar and dissimilar surfaces.
![BC-158 Cartridge](https://bapionline.com/wp-content/uploads/2024/03/BC-158-Cartridge-scaled-e1710955561783.jpg)