Believe it or not rivets are still made in the US. To say that every penny of overhead counts when some of your product is 4 for a penny is an understatement.
In 1997, Steve Van Name’s father had Duro-Last installed on one of his five roofs at NJ Rivet in Camden. He didn’t expect a roof with a 15 YR warranty to be waterproof for 26 YR but that’s exactly what happened.
In 2016 when that roof was almost 20 YR old, Manchester Roofing Systems removed a few cut nails that had backed out and welded some new Duro-Last PVC over those spots. No caulk, no glue, no tape and good to go for another 7 YR.