Motorcycle Gasket Sealer – The Right Stuff Explained

Engine Case Preparation And Cleaning

Motorcycle Gasket Sealer, Liquid Gasket, and Liquid Engine Sealant are the most common terms that people refer to the “Goo” that they use during the reassembly of their engine cases. Please read and shop carefully – the sealants and gasket goos that are sold at most auto stores and hardware retailers are almost always WRONG for your motorcycle engine cases where gaskets are not used.

ThreeBond and Suzuki Liquid Gasket

The term Right Stuff has been used to describe both human and product characteristics in many different ways, but I can’t think of one more fitting to motorcycles than the engine case sealant made specifically for the job of sealing crankcases.

Whether it’s Honda Bond, YamaBond, ThreeBond 1184 and 1104, or some wonderful stuff from Suzuki’s parts counter #1207B Gasket bond – these all are the Right Stuff. You will not go wrong with any of the products shown here. Proper engine case sealers like these are much thicker, they stick to the narrow engine surfaces better, and they do not deform and move away from pressure like the auto sealers, RTV, and Silicone does when tightened during assembly.

Gasket Sealer Failure RTV Silicone In the Wrong Places

I’ve been taking engines and case covers apart for 40+ years. The #1 mistake that I’ve seen in hundreds of previous repairs is the use of Silicone, RTV, or other types of automotive liquid or squeeze-tube sealers to assemble cases and covers. The Permatex RTV Silicone that you use at the ends of your car/truck’s intake manifold is NOT the sealant that you should use when assembling your motorcycle’s engine cases. The formulation, the consistency, and the amount of “Solids” carried in the sealant are not the same.

Gasket sealer squeezed out - Excess loose restricting oil passage

Look closely at the Black RTV Silicone on the cases of our Yamaha TTR225 project’s engine. You’ll notice that the sealer was pushed (squeezed) away from the very surfaces it was supposed to “seal”. The person doing the reassembly used the Wrong Stuff. Not only are the case surfaces not sealed and were leaking oil in multiple places, the loose strips and large pieces of RTV Silicone squeezed away are all over the inside of the engine – just waiting to be pushed through the oil supply and cause blockages and major failures.

Gasket Sealant Fail RTV Silicone In Many of the Wrong Places

Gasket Sealant Fail Loose RTV Silicone In the Oil Cavity and Clutch Area

Gasket Sealant Failure More RTV Silicone Where It Should Not Be

Any one of the before mentioned products will make your repair leak-free, more reliable, and bring your work up several notches above those who will still be using Window Sealers like Silicone, RTV, or equally bad Sealant choices.

Get the Right Stuff – and use it on your next repair. The Factory did, so why wouldn’t you?

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