Hybrid, Flexible Dock Door Solution The FlexDock option adders are designed to combine Raynor’s flexible panel with any Raynor 1-3/4″ or 2″ ThermaSeal, or doors. Available up to 20′ wide in either #1 or #1 and #2 sections. Designed to retrofit an existing opening on applications where damage is frequent to the bottom or bottom two sections.