Hello. You ask an interesting question. Both brands of tiles snug up well with closed seams when locked together. However, RaceDeck typically has a slightly tighter fit which will limit the amount of flex at the seam compared to Swisstrax. As a result, Swisstrax would accommodate changes in slope at the seam slightly better.

Hello Walt. The tiles stand up extremely well as long as you take a couple simple precautions. They can withstand a few thousand pounds or more per square inch as long as the surface of the object is flat. For example, if using a floor jack, it’s best to place it on a minimum 5/16″ thick piece of plywood to spread the weight. This is because the steel wheels are round and will carry all the weight on a very thin strip across the bottom of the wheel. In other words, they don’t flex like a small pneumatic tire would to spread the weight. If jack stands have flat plates on the corners, then no issue. If not, place them on a similar piece of plywood or you will damage the tile. We have a Mustang that is a part-time track car and we have pulled the transmission for a new flywheel and clutch kit, done multiple brake pad replacements, suspension changes, fluid changes, and etc. on a RaceDeck Diamond floor without any problems. It’s also more comfortable to lay on than concrete. Engine hoists and heavy rolling tool boxes are not a problem since it’s not enough weight distributed throughout the three to four wheels to do any harm. We have since moved and will be installing a new SwissTrax floor shortly that will experience the same type of work. This article here has a picture of the car on four stands just for an example.

You’re welcome, John.

I hadn’t planned to use the self-draining style, but I probably could incorporate some into my design layouts. Thanks for the suggestion. However, as I live in Houston Tx, and the humidity never drops below 80 to 85 per cent in the warm weather months, I don’t think I could wait for the water to evaporate on its own because of mosquitos, mildew, etc.
I had installed a product called ‘Tsunami Seal’ a few years ago which worked quite well for awhile. I think what I am going to do is to first investigate why the product failed and fix it if I can. Then look at the previously suggested solutions. If none are satisfactory or too expensive, I will buy a small shop vac and after a heavy rain, pop a few tiles and suck the water out. Problem solved – sort of. Thanks again for your input.