Roberston Bagpipe Seasoning can be used for sheepskin/goat skin/hide.
Seasoning feeds and helps preserve the skin of traditional pipe bags. This works to absorb moisture and keeps the bag airtight.
To check if a pipe bag is airtight, you should cork the stocks and then inflate the bag blowing through the blowstick as usual. If the bag stays inflated fully for at least a minute then you are okay. If it doesn't then it requires seasoning
(hide & sheepskin bag only)