Every contractor has suffered the damage to membranes by follow-up contractors.
The basement waterproofing has been done and membranes installed; then along comes a plumber or sparks and knocks a hole in it!
Wykamol has created special Peel & Stick labels to warn and advise against any careless damage.
The labels enable the addition of a name and contact details so that ancillary workers can ask advice and help maintain the integrity of the waterproofing.
Available from Wykamol.