Lea-Der™ Matting Warranty Lea-Der™ Matting Warranty Lea-Der™ matting warranty is two years from purchase date on manufacturing defect, wear and tear. Standard rig cleaning materials and procedures will ensure a long life for Lea-Der™ matting. Transportation and/or storage of Lea-Der™ matting is either flat or rolled not folded. Misuse and exposure to some chemical compounds may void warranty. Warranty freight costs are the customers’ responsibility.