Yes, it does definitely react with rubber mats, rubber hoses, etc. It will get a whitish haze that can sometimes be reversed with the use of a heat gun if it is caught within 24 hours or so. There is also a reaction that can occur with aerosol products such as spray on sunscreen and bug spray. This will happen with just about all PVC decking, this includes azek decking, and some trex decking, I guess the tradeoff for the low maintenence of PVC is you have to buy a nylon mat instead of rubber and put your sun screen on in the grass ;-)
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lighting underdecking
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