We're just beginning to finish our basement but have noticed for the past couple years some efflorescence coming up beside the mats we have sitting on the basement floor. House was built in 2007 in central Alberta in an area that has a high water table, we have a sump pump that goes regularly once the ground thaws and we have our downspouts away from the house.
I'm not sure what we should do about it, we've found conflicting articles about in online and have been given different advice from other people, from covering the floor (after cleaning the efflorescence away) with acrylic paint, waterproofing, dricore, and doing nothing. We also will be hooking up our in-floor heat and don't know how that will affect it. We bought Behr Interior/Exterior Low-Lustre Sealer but haven't applied it yet because we don't know if thats what we should use.
Edited to add pictures and mention if we lift up the mats, the floor and bottom of the mats feel moist.
Any advice would be greatly appreciated.