Linoleum not flush against tub bottom?
Whomever installed the linoleum in our bathroom prior to us living here, did not cut the template properly, and thus there is about a 3" inch gap where the linoleum ends and the tub bottom begins. In the gap there was probably a couple tubes worth of caulking, which were used to adhere 3 overlapping layers of material that resembles venetian blind lats.
The material was cracking, chipping, and peeling away. In the grooves between the layers a nice orange soap scum had taken hold. This is my 3rd big cleaning project since moving in a few months ago, but it became more than that within a few minutes time. I started cleaning, but realized quickly that the cleaners were just disappearing into this strange chasm of hodgepodge material. I ended up just grabbing one edge of it and tearing it off like a scab. What caulking didn't come up with it I scraped up. What I found beneath here was the edge along the tub bottom was black with mold. Peeling the linoleum back revealed an old layer of linoleum. The adhesive on both layers in this immediate area had failed due to water infiltration. The only thing that had been holding it to the floor was the caulking scab. Beneath the oldest layer, a moist plywood floor also covered in black mold, extending outward from the tub about 8" beneath the linoleum before the plywood was dry and clean again.
I bleached it, and left the linoleum flapped back to let it dry. The wood seems sound, I picked at it with my scraper and it doesn't crumble.
Short of replacing all the linoleum in the bathroom, what can I fill this gap in with instead?