Well I have just about finished about 75’ of spline roadbed and I am delighted with the results. (It was my first attempt at spline) There are a couple of dips I would like level out where I have double width spline for double tracks. My Question is should I fill the dips with latex caulk or drywall spackle or something else? I plan to use latex caulk to stick the track directly to the spline when ready. The biggest dip is about 1/16" deep.Thanks for all your help I would have never made it this far with such success without it.
I would use a wood putty that you spread on the low part, let it dry, sand it down and check it with a straight edge or level. I wouldn’t use latex caulk because you can’t sand it.
Brent, I have not used it because I suspect it would not…so I can’t honestly answer you. These would all be dusty, and you would have to seal them, say with another hard surface glue or epoxy. I tell you what I would do: use carpenter’s glue, the yellow stuff, or else paint the surface of the putty/plaster twice to get some liquid-type penetration and sealing of the surface, and then caulk would probably work quite well.
For a sandable surface, seal it with something first, then use almost any glue money can buy. [:)]