I have never used the product but I suspect that it is just a bog standard decorators' caulk.
Toupret make a caulk (Fibracryl) which has tiny fibres to accommodate a degree of movement in wall cracks. However, like all caulks it shrinks. I apply it, let it shrink and then over fill with Toupret RedLite. RedLite is a lightweight premixed filler. It is easy to sand and the dust doesn't cling to everything (unlike powdered fillers).
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