Use Slime for tubeless tires. On
www.slime.com, there is a calculator which tells you what amount you have to put in. I think it is 8oz. for each tire.
Before I used slime, my tires lost pressure pretty quick and I had to reinflate every 2 weeks or so, even though the tires were all new and didn't have any damage. Since I have put the slime in, I had to reinflate once in a couple of months.
Marc