A Simple Way to Set-UP Tubeless Setup tubeless are normally wastes sealant and causes a mess. This sealant injector will make the setup easier & clean. Injecting sealant directly into tire Some other type injecting tools push through the valve core , which could leave a lot of sealant residue inside the valve and core. But this sealant injector had a thin tube goes all the way down into your tire to inject sealant directly into your tire (need to remove valve core with valve core tool first), which causes no mess, Valve core tool included A small, handy tool designed to remove and install Shrader and Presta valve cores.