Hey Kenny, I looked through a 3M catalogue for #847 (substitute for OMC sealant Type M). Couldn't fine a 3M product with that number. Do you know what the 3M product is called? Does it come in a small round can with a brush attached to the lid?
There are different numbering systems used for automotive vs. the Marine products.<br />The 3M Marine I.D. for #847 is 62-0847-2631-4.<br />It "may" be available in a can, but we buy it in the tubes.