McNICHOLS POLYCAST® Presloped Trench Drain Systems are designed for indoor and outdoor residential, commercial, and industrial applications. POLYCAST® Trench Drain channels are made of a stronger-than-concrete precast polyester polymer concrete composite and are set in place prior to a slab pour. Our easy-to-install Trench Drain Systems are durable, resistant to many chemicals, and ideal for environments with extreme temperatures. The system is capped off with a removable slotted surface grate.