The most used way to prove whether or not a material contains asbestos is to have it laboratory tested using Polarized Light Microscopy (PLM).  Laboratories must be UKAS accredited and their work should conform to the HSE's HSG248 - The analysts’ guide for sampling, analysis and clearance procedures. All laboratories used by PASS (UK) Ltd are accredited the United Kingdom Accreditation Service (UKAS) Testing 1643 Accredited to ISO/IEC17025:205

Our easy to use sample kit is suitable for most asbestos containing materials, it is not suitable for taking samples from some high fibre release risk materials, some of which are very friable and easily release fibres when disturbed.  We urge you to assess that the material to be sampled will not risk yourself being exposed to excessive airborne asbestos fibres (>0.009 f/ml). For this reason, unlike some asbestos testing companies, we do not include a disposable paper personal coverall with your sample kit and the hassle of having to dispose of your suit as hazardous waste. However, disposable paper personal coveralls can be supplied, please contact us.

Suits, like the face mask, should only be used as a precaution against excessive fibre exposure and not to offset excessive asbestos fibre exposure. Creating excessive fibre release may create the need to employ an HSE licensed removal company to environmentally clean the sample site and surrounding area.