Excellent stuff for bonding, sealing, etc. and extremely strong, available in black or white.
I have used it for bonding alloy to fibreglass panels, sealing wing to headlamp bowls etc. etc. If a strong bond is required it is much better than Silicone RTV, also it can be painted. I have even used it to securely refit the handle to my wife's silicone handled spatula, when nothing else worked.
Care should be taken to avoid getting it on clothing etc, as it won't come off! If you get it on your hands it can be cleaned off with cellulose thinners, but it is best to wear disposable gloves.
The cartridge lasts a long time if a bead of adhesive is left protruding from the nozzle, which can be pulled off for the next use.
Every workshop needs one of these!