I asked for a 20 ft roll. I used every inch.
They’ve got tips for using minimal material and I think it may be just as effective. It’s possible that only 10 ft would have sufficed. Still, I’m happy having every flat panel section completely covered. Ceiling included.
Door closures that previously went ‘ding’ are now a sturdy ‘clunk’. I’m not sure how this translates into road noise and being able to talk to Bode 8 feet behind me while driving, but I’m hopeful.