Hi. My company is Bar's Products, the makers of Bar's Leaks and Rislone.
Rislone does not have any kerosene in it whatsoever. Many engine flush products do, but our Rislone Engine Treatment does not.
Regarding the lifter tick, there is a very good chance Rislone will diminish or even solve it. You can learn more about our Rislone Engine Treatment right here
, including access to its MSDS.
Any questions? Feel free to reply here or call Fred at 800-345-6572 x204. During the weekend our tech support is closed, so our Facebook page is very useful for helping customers with questions: http://www.facebook.com/barsproducts