The vials & caps are designed for general HPLC or GC applications.
Criteria of quality for BASIK™ and MicroSolv™ Brands include suitable fit for the autosampler (not jamming during injections, etc.) and being contaminant-free from the manufacturing process. Quality criteria for AQ™ Brand includes advanced testing by HPLC and LCMS and criteria for AQ™ Brand with RSA™ glass includes basic compound adsorption, surface metals and pH effects from the glass chemistry.
Whether the caps effectively seal outside moisture is outside the scope of the product’s design. As such, the caps may or may not be suitable for your application.