How can I fill cracks in a hardwood floor?

Ary
by Ary

I am thinking I might like to paint an old floor in a camp building. There are some cracks in the flooring where two two trailers had been joined together. The cracks are about 1/4 inch apart and deep. I think the floor cover is some type of linoleum. Can anyone tell me what one could use to fill in the cracks that would be durable and not later break apart. Under the floor covering ( ?linoleum ) is wood. What type of paint would work best for this project and last?

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