I used Ducan brand selant. It's made in Canada but may be available in the USA since I bought it at Home Depot. They have a website but I have forgotten it; you should be able to find it at a search engine. The only draw back is the application. The fumes are horrible and I'll never do it inside during the winter again. After 14 days the stuff is fully finished and the tort's can go in.

The product itself has 3 steps. First the enclosure is filled with the ducan filler, and cracks are taped with this white stuff also made by ducan. Finally a primer, and then the sealer is put on. It is very easy to clean, has a granular surface so supplies traction, and is very wear resistant.

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