Masking products is used to protect critical components before soldering and coating. UV92 can also be used as a barrier for keep out areas to prevent the coating floating in under componets etc.
TS300 can be applied directly from the bottle or with a brush, curing time is approx 30 minutes. It is easy to peal off and don't leave any residues on the PCB.
UV92 is applied manually from the syringe or with a dispenser, it cures quickly under a UV lamp and is very easy to peel off/remove and don't leave any residues on the PCB.