If you only need sealant and you already have an injection system then the Orange Seal Endurance tubeless sealant is for you. It comes in different sizes but all fit the screw-on Orange Seal injection head - if you already have one. The formula itself is designed to last two to three times longer than conventional sealant, which means that you won't have to refill the tire as often because it dries out. This premium latex sealant contains... what Orange Seal calls nanites, particulate matter of different shapes and sizes that quickly seal punctures up to 1/4 inch in size. It's also a little lighter to lose weight. Orange Seal goes even further and makes the sealant environmentally friendly. helping to preserve the environment and provide your peace of mind.