National Flooring Products recommends rubber non-slip mats NOT BE USED with TuffCore Flooring. The “Plasticizers” in rubber (natural latex or petroleum based) are what react and cause dis-colorization in LVP flooring. National Flooring Products recommends using products with natural fiber backings. Never allow moisture to become trapped under your rug. Non-slip underlayments are available. Make sure rugs and/or underlayments are labeled “colorfast” or “non-staining”.