Which one has higher precision, water glass casting or silica sol casting?

Both silica sol casting and water glass casting belong to lost wax precision casting. The main difference between them is the different binders used in the shell making process. The mold surface quality of silica sol casting is better and the dimensional accuracy is higher, so it is more suitable for precision casting. The products cast by silica sol casting have good surface smoothness, small deformation, small shrinkageratio, and precise size, and usually do not require secondary processing. However,
the cost of silica sol casting is also higher than that of water glass casting.