Duraline can refer to two different companies: Orbia Dura-Line, a company that manufactures protective conduit for fiber optic and power networks, and Inglot Duraline, a makeup product that acts as a mixing medium for cosmetics. Orbia Dura-Line makes physical infrastructure like HDPE conduit for telecommunications, data centers, and power markets, while Inglot Duraline is a liquid that can be mixed with eyeshadows to create an eyeliner or used to revive old gel liners.