Plasprime is made up of part recycled plastic which provides the key, it sits in the tub and doesn't sink like the sand in Bondit or Betakontakt or micro. The grain is too thick in bondit and Plasprime does not kill the suction enough on some backgrounds. Betakontakt is the one to go for if you can get it IMO for ease of application, 20 kg tub and the fastest drying.