[QUOTE=henryuk;138424]That sounds a lot like amalgamating tape. Black with peel off back, you stretch it as you lay it on and it fuses with itself forming a solid rubber mass that is effectively massively strecthed over whatever you put it on. This is great for low-medium pressure hose repairs, electrical connections etc. Not good for joining fabric though... Get it in a plumbers or motor factors
Yes this is the stuff sold in UK as gaffer tape. As I say great for waterproofing electrics, etc, but has no tensile strength. I would not use it for fabric repairs either. Seems several different products sold under same name. Years ago we had 'insulating tape' which was fabric covered in black goo. The type of gaffer tape I am on about is better at insulating joints because it is self amalgamating and completely waterproof, unlike modern insulating pvc tape which lets water in through the gaps. Ie it is better at waterproofing than insulating tape but do not know how it compares at insulating in the dry.
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