New 8″ Wedge Seals Cal Am Wedge Seals provide a quick and easy-to-use system to protect and organize ducts and cables for fiber optic, telecommunications and electrical applications. Our device consists of a thermoplastic elastomer seal, split to ease cable installation. Inner and outer wedges force the seal to firmly grasp the pipe or cable creating a tight, rain-proof seal. Our design and manufacturing capabilities allow us to make your product very quickly. Even custom-made seals can be turned around in a matter of days, not weeks!