The Truth about Plasticizer Migration
Do not let any rubber manufacturers tell you otherwise.
Plasticizers are chemicals added to plastics, vinyl, and rubber to make them softer and more flexible. The softer or more flexible the material, the more plasticizer it contains. Since rubber mats are fairly flexible, they contain a lot of plasticizer. Over time, the plasticizers migrate out of the rubber and are absorbed into surrounding materials (vinyl, LVT floor). Heat and pressure can speed the process.
Typical Example of Plasticizer
"I used rubber underlayment in our bedroom under LVT (luxury vinyl tile) with an acrylic adhesive. This was all according to manufacturer's instructions. Now, the tile looks like it is changing color and softening. One guy told me this was plasticized migration (if that's a correct spelling)."
My question is: What is causing the staining? Is it the rubber, the adhesive, the adhesive and the LVT?
I like the rubber underlayment because it is
recycled from tires and I am an environmentalist, if nothing
else. Should I change adhesives once I change the LVT or is
there some one to prevent this plasticized migration?
The Solution: Never use recycled rubber & vinyl together, the rubber is too soft and will cause indentations and the plasticizer will cause the floor to discolor, become brittle and over time break its bond to the rubber. The VC300 is specially formulated for resilient vinyl flooring, it contains no rubber and has a higher surface tension than recycled rubber to reduce indentations.