Senior Airlock works well for sealing your fermentation vessel. Some brewers prefer to use a Senior Airlock inside bored bungs inside glass carboys or demijohns or barrels.
Whether you prefer a Senior Airlock or one piece S-Type Airlock is a matter for personal brewing preference.
If you want to read more on S-Type vs Senior Airlocks you might enjoy the following blog on the benefits of each:
3 piece Senior Airlock v S-Type Airlock