The International Window Film Association (IWFA) has the utmost concern about any written specification or recommendation that would call for the use of any type of window film, such as a safety or security film, as a primary component of a "bullet resistant glazing". Safety/security films are being used in conjunction with various designed and tested bullet resistance glazings, but primarily as a "spall shield" to reduce the "spalling" off of small fragments of the glazings on the interior side in the event of being penetrated by ballistics.