I was quite critical of the initial batches of the Silca ultimate tubeless sealant because like quite a few other users, the carbon fiber pieces eventually formed several large clumps of carbon fiber balls. In August last year, I thoroughly cleaned my Schwalbe Pro One TLE tire and Enve 4.5 AR rim before mounting the tire on the rim. I added about 2 oz of the Silca sealant with Fiberfoam. In early November, I injected about 1 oz of the Silca sealant replenisher prior to a 1-month trip to the tropical Singapore and Malaysia. During that trip, I had four punctures, all successfully sealed by the Silca sealant. Other than one puncture that lost about 20 PSI and required a mid-ride inflation, the sealant plugged the other three punctures with negligible tire pressure loss. I know the exact tire pressure because I have the Quarq TyreWiz tire pressure monitor installed.
Recently I have an issue with the rear hub of my Enve wheel that requires the wheel be shipped back to Enve for service. So that presented an opportunity to examine the Silca sealant in that wheel. Upon dismounting the tire - almost three months after adding the replenisher - there appeared to be sufficient sealant to perhaps last a couple more months. There was zero sign of carbon fiber balls so the initial bottling issue that caused this appears to have been resolved.
So far, with the Silca ultimate tubeless sealant, even those initial batches that had a tendency to form carbon fiber balls, I have not had a…