The Offshore Voyaging Reference Site

Q&A: Tef-Gel Versus Never-Seez

Question: I am intrigued by your high praise for Tef-Gel. I have not heard of it before, and in the past I have used ‘anti-seize’ for mooring shackles and installing stainless steel fasteners in aluminum. I am curious about your experience with ‘anti-seize’ versus Tef-Gel. In addition, I have had good luck using BP Blaster to loosen s/s fasteners in aluminum when there is some corrosion. What works for you when s/s fasteners are being stubborn?

Answer: I can’t say that I have really done any comparison between Tef-Gel and Never-Seez® (I assume you are talking of Never-Seez or one of its close cousins). We carry both on the boat and we tend to use the former on areas where stainless steel and aluminum meet and the latter for steel on steel interfaces. Both are good products and we have never had trouble removing a fastening that was treated with either.

As far as BP Blaster is concerned, I have used it a couple of times but not found it any better than anything else for loosening a seized fastening. In most cases, I have found that if a stainless steel fastening was installed dry into aluminum and is well and truly seized, about the only thing that will shift it without ringing off the fastening is heat. To that end we carry a MAPP gas (burns much hotter than propane) torch, although I have to say that, as we have owned the boat since 1991, have disassembled most everything on her in that time, and are scrupulous about always treating screws, it is not much of an issue anymore.

Inline Feedbacks
View all comments
Dick Stevenson

Dear John, For those tempted to Never-Seize, it works great but the product dries to a grey semi soft powder which falls to the deck and gets tracked everywhere and or gets on your hands and tools and is transferred everywhere. Wiping up just results in spreading it into larger areas of grey. Great stuff if used only in workshops on concrete floors but we found it to be a nightmare on boats. Duralac has been our standby and we are about to try TufGel.
Dick Stevenson, s/v Alchemy

Dick Stevenson

Thanks for the good info differentiating similar products. Your comments suggest that Duralac is better for thread locking than TufGel. I have just started using TG as I could not find Duralac recently. Is the comment about toxicity and burning refering to when you might end up heating a fastener to get it apart and it has these agents on the threads?
My best, Dick Stevenson, s/v Alchemy