P.D.Q is a wet purging compound designed to chemically remove polymers and resins. The Bottle design lets you measure out exactly what you need. You will only need one ounce of PDQ for 10lbs of resin. You can feed the mixture through a hopper or straight into the barrel. No soak time is needed. Also P.D.Q comes in pre packaged plastic bags that can be entered straight into the feed throat as well.