Hold the applicator firmly in one hand.
 

Select a clean, unused QUADSEAL® cartridge. Leave the overcap in place.
 

Ensure the nozzle is pointing upward and forward.
 

Insert the cartridge into the magazine by tilting it slightly so the lowest tube passes behind the retaining notch.
 

Push the cartridge down until it clicks securely into place. The applicator is now ready to use.