Dynaplug, Grand Pitstop, Slime, and Western Weld plugs undergo testing of their advertised features, such as the tools included and plug type, to their technical merits, from tested air tightness to adhesive strength. Pricing ranges from $14 for the Slime kit to $40 and $48 for the Grand Pitstop and Western Weld, respectively, and up to $54 for the Dynaplug kit. While the Dynaplug, Slime, and Western Weld kits use traditional tire plugs, the Grand Pitstop kit relies on shorter mushroom plugs to seal punctures. Alternatively, the Grand Pitstop kit includes a special mushroom plug insertion gun, differentiating itself from the more typical handled insertion needle included in the three competitors. Dynaplug’s kit is by far the smallest at 27 cubic inches while the Slime kit takes up slightly more space at 50 cubic inches. The Westweld and Grand Pitstop kits move into the triple digits at 240 and 112 cubic inches, respectively.