Ad Hoc Testing
Some penetration seal products may have test evidence created by ad hoc testing to BS476: 20. The testing is deemed ad hoc because the British Standard BS476:20 does not specifically deal with penetration seals.
Some penetration seal products may have test evidence created by ad hoc testing to BS476: 20. The testing is deemed ad hoc because the British Standard BS476:20 does not specifically deal with penetration seals.