Physical properties of sodium silicate-based substances make them very attractive for commercial/industrial use. Liquids and solids based on sodium silicate and produced by PQ Corporation have a density from 1.6g/cubic cm. to about 1.4 g/cubic cm.
A very big difference between acrylic and oil paint is the drying time. Acrylics dry in a matter of minutes to hours and oils dry in a matter of hours to weeks! This is a huge factor when choosing whether or not to choose oils versus acrylics.
The acrylic primer protects the painting substrate from damage from paints and solvents. This is more important for oil painting than for acrylic or other media. Oils in oil-based paints can corrode and damage the threads of canvas or linen or eat into the wood of panels.