Industry use them all the time as you say quite a bit cheaper if you need a large amount, i have just sealed my carport with Sikaflex pro took 9 sausages, your gun was very cheap I paid $40odd a few years ago
Just picked up a 600 ml Caulking gun from Bunning's for just over $10.00. Great if you need to use more than a couple of tubes as the sausages are often cheaper than the 200 ml cartridges.
Growing old is compulsory, growing up is not.
http://www.wet-seal.com.au/waterproofing/locations.html
Industry use them all the time as you say quite a bit cheaper if you need a large amount, i have just sealed my carport with Sikaflex pro took 9 sausages, your gun was very cheap I paid $40odd a few years ago
i too have the $10 bunnings caulking gun and find it the same as the $50 one i got from coventry fasteners.
the only time i have ever been concerned about the cheap gun is when i had a small hole cut in the nozzle and i was being a bit impatient on the trigger, so it made a few noises but this was purely my own fault.