As mentioned in the group and the video, this tape can twist and wont join if the zip isn't applied correctly. Once the zip is applied correctly you will have no troubles. I have discounted this tape (as it is a fault with the tape), to half price, as it is still usable, some may find it a little difficult to attach the zip so as the tape doesn't curl or seperate.
I have matching zips available also. This tape will work perfectly with ANY of our other zips, it is only affected when the matching zips are not on the tape perfectly. I have achieved the mix up tape buy simply cutting 2" off one end of the tape and joinin glike usual.
Cost $1.60 per meter
When purchasing more than 1 mt of tape it will arrive in one contentious piece.