Recommend this for all battery corrosion even on torches,toys etc. where you get the green stuff. Make sure you scrape off as much as possible then apply a thin layer.
Used to be a similar product called no-Croce back in the 70s, worked really well, I am pleased there is still something available that protects battery connections, will know in a year or two how effective it is.
I HAVE ONLY JUST APPLIED THIS PRODUCT TO MY BATTERY, SO LONG TERM TO STOP CORROSION I CAN'T COMMENT BUT IT WAS EASY TO APPLY AN HAS NOT EFFECTED THE CORRECT FUNCTION OF THE BATTERY AND CONNECTIONS.
Covered the battery terminals with this in family members cars. Had no problem since, so obviously works well at keeping dampness and oxygen out! Would definitely buy again.