[renovationinnov]

peter ' when I was extending the cab of a Morris minor ute [ 2 piece \] we added 300mm section & window I tried welding which broke so I sikaflexed the joints then etched it n coated it with epogen [ black/ white halves mixed together turns grey ] & gets hot as you kneed them together but never cracked in the 2 years I had the ute extended
hope this helps
epogen I got from trade link plumbing suppliers
my uncle builds fire trucks & that's what they us to bond & joint the extra cabs together
rob