TC Pro has two types of surface: TC surfaces, which are meshes that don't do curved surfaces, surface booleans (shelling, filleting, chamfering), physical properties even if they're manifold volumes and some other things, like snapping to the centre of mesh cylinder ends. TC's other surfaces are ACIS surfaces, which do allow those things, and others as well. ACIS also has some capacity to repair some faults, like stitching open seams such as occurred with some older programs that produced IGES solids from faces, and the capacity to make a solid from a surface even if it has missing faces, if those faces are planar. So if you drew a quarter-circle arc and single line polyline and revolved them to create a hemisphere on an open cylinder, select it and modify|modify 3D objects|create solid|from surface and that's what you'll get. SAT healing does the same thing.