Thanks for the comments.
I called a North Sails loft this morning. I asked about Tenara and they had never heard of it. They say they use a product Hemingway & Bartlett Dabond 2000 UVR Polyester
Thread and Needles
Unlike Tenara I can't find any references as to how long the product might last.
Has anyone used Dabond. What is the quality, durability?