I haven't had any major tire gashes or anything substantial to actually test the sealant, but based on how fast and thick it solidifies when exposed to air, I have no doubt this is a high performance sealant. They do warn you it will take more attention to keep the sealant performing at its peak and I would agree. You probably need to check up on it every 45 to 60 days. At 45 days, mine was pretty dried out and not sealing much. For regular riding, probably get the other formula that is a little less maintenance. If you are racing, put this stuff in the day before and never worry about a flat!

Tire Sealant - 32 oz

I was handed there O2 for free!!!! and got straight to trying it out with there oil slick valve cores also never had any issue putting sealant through the valve cores.
I can see this company has the best quality. And will be ordering off there site in the future.

Best sealant made. Great quality and does the job

Not much to say except that it actually works and seals punctures. I rarely get punctures but the only one I’ve had using Black Ox sealed after I lost 9 psi. I was able to ride down, give it some more sealant, and it has held air ever since with no issue. This stuff is legit.