I use this stuff, but only as I have several hundred metres already on my reels:
http://www.berkley-fishing.com/berkley-line-superline-berkley-fireline/berkley-fireline-original/1316955.html#start=1
Pretty much indestructible, especially if coated with Aqua Sure. Though I found Storm Sure to be cheaper and actually survived better underground. Also this stuff is just as good, and you can get it at B&Q:
https://diy.evo-stik.co.uk/product/serious-glue