Are Caustics Immune to Another Caustics?

PSA: Caustic is immune to other Caustic gas.

Can caustic see through enemy gas?

Nox Vision – Passive

Only Caustic will be able to see the outline of enemies, so be sure to alert teammates about their location in the poison gas. Since enemies can't see through the gas, Caustic players can use it as cover to revive teammates or quickly heal.

Is Revenant immune to caustics gas?

One of the most annoying to play against comes in the form of Caustic's Nox Gas. It is deployed from a small trap and will cloud your vision as well as decrease your health. But, players have found that two legends – Pathfinder and Revenant – have an increased tolerance to the gas compared to other characters.