This is a multi-purpose primer for all types of oil painting, allowing paint to adhere consistently and offering an opaque gesso-like surface suitable for all types of painting supports.
Thixotropic means a fluid which is viscous but becomes freer-flowing when it is shaken or brushed on, and which returns to its viscous state over a predictable timescale when it comes to rest.
These qualities are useful to artists in offering controllable application and reliable drying.
Your canvas will need sizing with rabbit skin glue before priming. It is important to apply the primer in thinned layers. It should not be applied neat from the tin.