Home Depot and Lowes sell an actual vinyl floor adhesive instead of silicone. It will join the slit and will be a lot less noticeable. I had to use it when I had a screw in the floor of the slide rip the vinyl of the main floor. It also filled the gap it left with multiple applications. In my case I also covered the 4" slit with clear packaging tape so it would feel smooth. When it got scuffed the tape was only noticeable when well lit from the right angle. We completely forgot about it.
Married To The Navigator
2005 Red GMC Duramax 4X4 HD Crew Cab
2018 North Point 315RLTS
4" Magnaflow, Banks Air Intake
Firestone Ride Rite Air Springs