Originally Posted by Shullj
All the rivets in my Casita
are aluminum, including those installed in the factory. I would certainly stay away from carbon steel or galvanized rivets. Also the tech at Casita
advised me not to use screws as they can cause the fiberglass to crack. Dow silicone (RTV) is an excellent sealant and can be found at any hardware store.
That "tech" doesn't know squat. There are two reasons why trailer manufacturers use pop-rivets instead of good stainless steel machine screws and nuts. Price
. They are used because they are cheaper and quicker to install. That is absolutely total BS about screws causing the fiberglass to crack. I've worked on many trailers and RV's, and long before that, for many years on boats. The marine manufacturer's, and particularly those who make fiberglass boats, have been using stainless steel nuts and bolts for over 60 years now, because they are far superior to rivets, And I can tell you that boats are subjected to much harsher environments, and to more stress from pounding, twisting, slamming and torquing than any travel trailer will ever see. They use nuts and bolts in fiberglass boats for their strength, where rivets would perform dismally.