In most cases a new gasket is required, but no sealant.
never
none. if you use a gasket dont use sealant. Also never use sealant on a automatic trannsmission. It could damage the tranny and will not last.
Never use sealant for a head gasket! It is used as a quick fix for cracks in the gasket but will not last very long. Safer to get the job done correctly.
you should never use a sealant on a head gasket as that is only a temporary fix in an emergency situation. The only permanent fix is to replace the gasket.
no gasket sealant needed. Just original gasket is fine.
no u dont need to use sealant u should get a gasket
If both surfaces are clean and flat and you are using a new gasket, no sealant is necessary.
no, use rtv sealant
NO. You should NEVER use any type of sealant on the transmission pan.
When using a new pan gasket, no sealant is necessary. Using sealant on a automatic transmission pan gasket is a bad idea, excess sealant can cause trouble.
Sure. 100% silicone can be used. The sealant is not necessary as the gasket does the sealing anyway. the sealant does help hold the gasket in place for easier installation.