Wow I thought you were going to break out some fancy machine, pretty neat that you can DIY a water jet tool. Nice clean install. Sir do you prime and cement or do you use an all in one version?
TDG, if going under a long length like under a driveway it's best to use a machine (like an Under Wonder), but I've done it without it on a narrower driveways (20 ft or less). I use Weld-On primer and Christy's Red Hot glue (because my supplier no longer stocks qt. containers of 721. This is the exact same formula as Weld-On 721 so either will work.
