Repairing pressure cookers, especially ones with cracks, is best left to professionals or the manufacturer. If your pressure cooker is still under warranty, contact the manufacturer to inquire about repair or replacement options. If the warranty has expired, consider investing in a new pressure cooker for your safety and peace of mind.
Using glue to patch a pressure cooker is not a reliable or safe method, as the high temperatures and pressure involved in pressure cooking can weaken the glue or cause it to release toxic fumes, which can contaminate your food.
Remember, safety is a priority in the kitchen, and it's essential to use cooking appliances that are in proper working condition. If your pressure cooker has a crack or any damage, it's best to discontinue its use and replace it with a new one to ensure safe and efficient cooking.