For a perfect seal when assembeling your wheels use Permatex Silcone.
General-purpose, clear RTV indoor/ outdoor sealant. Seals, bonds, repairs, mends and secures glass, metal, plastics, fabric, vinyl, weather stripping and vinyl tops.
May be applied to horizontal or vertical surfaces. Permatex® Clear RTV Silicone Adhesive Sealant is waterproof and flexible.