Mortex's Viscosity Cup helps the contractor determine the correct amount of water for the mixture. To use a Viscosity Cup, tape handle to a yardstick to keep hands and arms out of the mixer. Stop mixer and fill cup full with material. Lift cup out of material and start clock. The Viscosity Cup should drain in 17 seconds for best results on flat surfaces of Kool Deck Elite, Keystone Kool Deck and Designer Colors; 20 seconds for Marquee.