Rhino horn is a lump of congealed hair. Doubt it will not be damaged.
Why wouldn't you try
https://www.walmart.com/ip/6X-DEVCON...5-ML/111524404
or something from the family, such as
https://www.walmart.com/ip/10240-Pla...vcon/700864821
It is used in metal industry, holds like nothing else.