Gasket Sealer Compound vs. 847

[sruman]

Question:
I'm replacing the water pump in my '82 Johnson 150. The kit calls for Adhesive 847 and Gasket Sealing Compound.
Now, I work on cars a good bit, and I have some form-a-gasket 2A gasket sealant. Can I substitute this for the 847 or the Gasket Sealing Compound? Or do I need to order something special for marine use? If I do need to order, can I simply use the 847 where it calls for "Gasket Sealing Compound"? From what I've read, they are basically the same thing.
Input?

 

[yorab]

Re: Gasket Sealer Compound vs. 847

I'm not sure about the form-a-gasket that you have but I know a bit about the 847 and the gasket sealing compound. The 847 cures relatively quickly and should be used where the service manual calls for Sealer 1000. The gasket sealing compound remains liquid and should be used on most gaskets except manifold/carburetor gaskets. They are definitely not the same. More information can be found at: http://forums.iboats.com/showthread.php?t=444590&highlight=sealers

 

[HighTrim]

Re: Gasket Sealer Compound vs. 847

Agree with above, they are not the same. The 3M 847 is for metal to metal contact. Such a spot would be under the impeller plate, gearcase seals, etc...

The gasket sealing compound is for gaskets not on the intake side such as carb gaskets. You can add some to the water pump screws, t stat gasket, etc..

 

[seahorse5]

Re: Gasket Sealer Compound vs. 847

3M 847 is similar to a weather stripping adhesive and has been around for many years as Sealer 1000, Type M, Boat Armour 1000, Marpox 1000, etc.

Gasket sealing compound in the automotive world is Perfect Seal #4.