Schlegel | Schlegel.com Schlegel, seal, window, door, components, weatherseal, Poly-Bond, pile, brush, Q-Lon, PU, foam, Foam-Tite, TPV, Lozaron, extruded, Nova-Seal, PP, PVC, TPE, EPDM, rubber, silicone, hardware, ERA, Fab & Fix Schlegel continues to improve existing processes and products, as well as test new compounds to achieve quality sealings of the very highest standard for every type of window and door.