How can I fix holes in waterproof membrane?

[Sentry1]

I need to fix some cuts and holes in a waterproof membrane at the edge of a concrete slab.

Does anyone know the best way to do this please? Do I find new membrane and glue pieces on somehow or is there a better way?

Thanks v much.

 

[Deluks]

DPM tape.
(Not the stuff army snipers use on their rifles)

When you say the edge, is this a slab that's already been poured?

 

[Sentry1]

Thanks @Deluks . Yup. Already poured. There are not only a load of holes and tears, there’s a corner section that’s been cut out! See my previous post for a picture:

Thread 'Basement slab advice please - can torn membrane be fixed?'
https://www.diynot.com/diy/threads/basement-slab-advice-please-can-torn-membrane-be-fixed.602120/

 

[^woody^]

You may be better off with a liquid DPM rather that tape, if there is not enough DPM to stick the tape to.