You want to do this in a very well ventilated space. The smell is pretty strong.
Packing the shredded horseradish into jars. Gloves are a must in this whole process. It really burns your hands if you don't wear them.
We topped the bottles up, and canned them. We tried a bit after canning and it was great. The only thing I would change is the texture. Our food processor shredded the roots into a bit bigger pieces than I want for some things. Still, it was a success.