In a prespray we would use ~4 oz. of Powder vs. ~8 oz. of Liquid/gallon
With a powder like our PowerMax ; you can have some advantages:
1. Surfactant Blend with more chelating builders
2. d-Limonene citrus solvent for grease cutting
3. Percarbonate for oxidizing stains (pH -10.5)
4. Oxygen-stable actual enzyme for stain removal.
With liquid presprays like our H.D. Preconditioner:
1. More solvents in the formulation
2. More surfactants in the formulation.
3. Oxygen components more difficult or not stable
4. Enzyme components more difficult or not stable
So for stains and urine, the powder would work better {oxy + enzyme}.
Liquid is easier to mix, and can be used in stronger dilutions when required.
http://www.cobbcarpet.com/zen/index...earch_in_description=1&keyword=DCPM7+or+DCHP1