Plastic and Composite Railroad Ties and Recycled Plastic Railroad Ties, available at Markstaar are manufactured and produced using 100% recycled plastic industrial building materials. Stronger, lighter, and more cost effective – Markstaar railroad ties, I-beams, timbers and pilings are changing the way global infrastructure is built. Markstaar recycled plastic products will not rot, rust, crumble, corrode, degrade, fade or crack.