Best RTV for Rear Axle Case

[My Kubota1]

Due to a small drip I will be removing the rear axle transmission cover which does not use a gasket, just RTV according to Kubota. It appers that it had been removed in the past and a white RTV used, brand unknown. Would be the best RTV to use?
Thank you

 

[North Idaho Wolfman]

You need to read the WSM (aka service manual) as some require an anaerobic gasket maker and not RTV.
Permatex 51813 anaerobic gasket maker is one

If you need to use RTV, permatex ultra grey or blue are my go to RTV sealers.