Waterproof mat

Evening all. 

Im looking for the best waterproof mat to place in the back of the van. Any ideas welcome. 

Thank you. 

http://www.ebaystores.co.uk/arkrubberandresinsolutions/pages/rubber-rolls I had some of this in my van before Protectkoting it 

I think it’s better to have it sprayed with speed liner or similar personally but you can buy rubber matting by the meter that is waterproof, try googling rubber matting ime guessing eBay would sel it , we have a firm near me called mcsalvors that sell it in a variety of styles , colours and thickness, up to 4 meters wide .