To ensure that you get a true test, it is important that the RILEM tube is properly attached to the area you wish to test. If you don’t get a good seal between the putty and the wall, you might get a false fail (leaking through the putty).
Place the RILEM tube by pressing the base of the tube firmly against the surface
Be sure to apply adequate pressure with the palm of your hand to ensure a good seal
Note: Ensure that the inner opening is not obstructed with putty. Putty is resusable. Store in a cool place.
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RILEM How To prepare a RILEM tube for testing
