Soudal Fix-All
https://www.tlc-direct.co.uk/Products/FXFAHT.html
Cheaper than Sikaflex and works brilliantly. I use it for electrical back-boxes on high density blockwork. Quicker and cleaner than drill/plug/screw.
Dee
https://www.tlc-direct.co.uk/Products/FXFAHT.html
Cheaper than Sikaflex and works brilliantly. I use it for electrical back-boxes on high density blockwork. Quicker and cleaner than drill/plug/screw.
Dee

I picked up around 3 once when Lidl had them, simply for the fact you can use the sausages & both cartridge sizes with them. Unscrew the end caps slightly, & theirs will accept the large cartridges, which a lot of guns won't.