Insituform Denver. The name “Insituform” is known all over the world. Insituform does a ton of pipe lining in most major cities, like Denver. The founder of Insituform created the cured-in-place-pipe lining technology, and today it’s spreading across the world! There have been many companies spring up trying to be the next Insituform, only fading out when their success wasn’t plentiful. Perma-Liner Industries, Inc. was founded in 1999 by Jerry D’Hulster and has been leading the way for smaller diameter pipes since the beginning. If you live in Denver or any other region of Colorado and have underground pipes that need rehabilitation, please contact Perma-Liner any time!