There are several brands  in solvent based & a few in water base.
Some that I can think of at present 
Solvent based,...... Ronan lettering (oil),  House of Color (urethane ) several others  I don't remember names.
Water based ,......  Ronan Aquacote lettering,  Nova Color, Golden,  of the 3 Aquacote is the easiest  to letter with, Nova Color will last longer & works well on rough walls better & with proper additives letters easy. the Golden is more available  & about same as Nova both made the same way all pigment.
I try to look up & remember other solvent based  brand names  for lettering & check in later.
Always hand paint