On 12/06/2019 20:51, Chris Green wrote:
There seem to be lots of people selling aluminium brazing rods nowadays
with claims that it's easy and as strong as welding.

One of the major suppliers is Durafix:-

https://www.ebay.co.uk/p/DURAFIX-EAS...d=302591197676

Does anyone here have any experience of using this (or other similar,
but cheaper) aluminium brazing rods?

I'm interested in this too. I bought some a couple of years ago just to
play with. Not as easy as the videos suggest, in my experience, and I am
fairly experienced in soldering and silver soldering with a gas torch
for steel, copper alloys, and jewellery.

For things like crack sealing I'd look at epoxy first.