Pond question

[davholla]

When I was ill an idiot moved my pond and in the process built a pond with straight sides - no slopes.
I am trying to repair the damage.  I have made two of the slopes sloping.  I have some spare butyl liner.  Can I use this to stick on to the liner so that I can make the new sides waterproof?
http://www.amazon.co.uk/dp/B00PIWVMJ8/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=3NQ6PPBFIQ48Z&coliid=IUZI975BO3DRQ

[davholla]

[picman]

I used something similar to extend a liner to make a bog garden , worked ok for years. the local pond shop sold it by the meter, make sure the liner is really clean , it should be REALLY sticky stuff, you only get one chance to put it together ...