It is a thin Primer Surface fiiller almost the consistency of paint. It works great for filling small gaps, seams and scratches. It is easy to apply and quickly dries to a smooth surface without bubbles.
Mr. Primer fills minor imperfections in your build
useful for filling in bumps, dents, scratches, for removing bubbles and finishing bases. Can be diluted with either Mr Thinner or Mr Levelling Thinner.