There is plenty of good information out there on bed surfaces and their adhesion. This is just a summary of any surfaces when used with the Railcore.
Everflex™ PEI Double-sided and textured powder coated PEI flex plates offered by Subtle Design. Compatible with all forms of sensors and probes. Printed parts self release when cooled down. https://subtle.design/everflex
Lokbuild is the build surface on the BOM. Compatible with dc42’s mini-differential IR sensor and BLtouch. http://lokbuild.com
PrintBite+ - printed parts “self release” as the heat bed cools down with this surface. However be aware that it seems that it may be translucent to IR and so not a good surface when combined with dc42’s mini-differential IR sensor (which is the standard on the BOM) https://flex3drive.com/printbite/
BuildTak Works well with BLTouch, folks report erratic results with IR. Stuff sometimes ticks too well when used on a fixed bed; is best suited for a removable flex bed like the magnetic bed. https://www.buildtak.com