I decided to grind up some castor mixed with a little glycerin just for the heck of it and wound up with more than I expected ( a pint) . The castors were clean , dried for a few days and frozen . They were processed in a small food processor and have the consistency of a slightly loose peanut butter . Will this mix go bad quickly ? Does it need to be refrigerated ? Can Sodium Benzoate be added as a preservative ? Thank you for any input .

When I grind castors that have dried, I simply store the ground castor in a bucket with a bit of 100 proof vodka poured in the bucket to keep them from molding. I usually put a cup of vodka to 3 gallons of ground castor. I've never had castor go bad on me when I treat it this way. No refrigeration is necessary and I don't as sodium benzoate. I do cut off the saddles, which is the part that joins one side of the castor to the other. This is membrane and not castor.

Thank you sir . If it wasn't after 9:00 i'd go get some ! LOL I'll try that tomorrow . No problem using this at a castor mound set ?

Nah, no problem at all. It takes time for the mold to form, you have time if you've ground it recently.

That's how I do mine. I refrigerate without adding anything other than the glycerin. No mold yet, year and a half later. And like some have said, it gets better with age.

Also, that's what I use at castor mounds.

Yukonal , I decided to go with the bosses idea as I plan on carrying the castor in my truck for the remainder of the season . It will get hot then cold etc . I need to transfer some to a smaller container and only carry a little and keep the rest refrigerated or frozen . I will try your method on the next smaller batch .
I don't drink vodka but had some of this left so I'm trying it . I didn't want to waste the money on the Vodka lol .

The alcohol can't hurt a thing. Maybe I've been lucky. 2 batches of bait, and 2 batches of castor in the last 2 years without vodka to knock down mold...and no mold yet. Maybe I'm running on borrowed time.

Going to make 3-4 gallons of meat bait, and 1 gallon of mouse bait in about a month...and I am going to throw some vodka in. Just because guys with a WHOLE lot more experience than me, say to.