Can this floor be installed over an existing rubber floor, and if so, what type of adhesive should I use?

Yes, you can install our 8mm Strong Rubber Rolls over an existing rubber floor. If you're gluing the rubber to the rubber flooring underneath, the glue you would want to use is a polyurethane adhesive. We have two to choose from our standard Polyurethane Adhesive and our easy-to-use EZ Polyurethane Adhesive.