The lightest, and some say most effective tire sealant is Orange Seal Tubeless Tire Sealant. Rest easy knowing that Orange Seal is at work keeping your tires inflated no matter what you encounter on the trail. How do they do it? It's all in the chemistry. "Nanites," particles of widely varying size and shape, are suspended in an application-specific liquid latex, and quickly and effectively swarm puncture wounds to seal them up and prevent loss of air pressure inside your tires. Orange Seal claims punctures up to a quarter-inch are sealable and is made with eco-friendly, biodegradable ingredients. The 8oz bottle comes with a twist lock cap that will accept the included tubing for use as a sealant injector. Just remove the valve core and sealant bottle's orange twist lock cap and install the twist lock end of the injector tubing onto the bottle cap. Slip the other end of the tubing over the valve and squeeze the sealant into the tire. 8oz. bottle with twist lock and tube.