Are these mats porous? Or non-porous?

Our 3/4" 4' x 6' Extreme Mats are semi-porous. Any liquid that falls onto the mat, if not cleaned up right away, will eventually start to absorb into the mat. If there are any salts or other small particulates in the water, then these will get stuck in the pores in the mat. They will be practically impossible to remove. We do offer our Rubber Floor Finish and Sealer that can be used to make your floor non-porous. This sealer is recommended in gyms and doggy daycares.