The instructions that arrived with Ride-On are very comprehensive, including what they refer to as a "Dosage Table" for just about every bike & scooter tyre size. The sealant comes in 2 x 8oz calibrated containers, and requirements for the wee are 6oz for the front, and 8oz for the rear.
They warn that some vibration may be experienced when first installed, and recommend 30mph for the first few miles while the sealant is distributed inside the tyres. I stayed at 30-35 for 2-3 miles and didn't feel anything, so after that rode normally.