I'm not sure why you would need to but maybe just plain ol' tape? Do you need to plug the hole for some reason?

Didn't know if the sealer would eat through the tape glue or contaminate it. Gotta plug it so I can slosh it around. It takes hours to do and about 4 days to dry!
Jeff

You really want something a bit more secure than tape....although I do use really good duct tape over the fuel filler hole, and hold my hand tightly over the tape when I turn the tank upside down to coat the top of the tank.

For the petcock hole, take a flat piece of metal, drill the petcock mounting holes in it, then cut a small piece of rubber or cardboard for a gasket.

Here is one I made for the S65 Honda....which only has 1 screw hole.  It is a piece of flat metal bar, a piece of rubber roofing, and a screw.  You will need to make one with 2 screw holes.

Kris01 wrote on 06/19/15 at 06:57:12:


The part of the process where you slosh the stuff around does only take 15 minutes, and then when you dump it out it does take a while to get the excess out the tiny drain hole.......the drools and puddles might be an inch wide when they flow past the small petcock hole. You have to keep moving the tank back and forth a bit to keep getting the excess drained out.  You can't drain anything out of the gas cap hole as the lip prevents it from draining out. Finally when you are tired of moving it around and have as much excess out as you can....I tip the tank so stuff drains away from the petcock hole and flows to the front or back of the tank.  You need to clean off any drips or dripples on the petcock mounting surface and oval hole where the tubes slide into the tank.

Then you have to let it cure....adding an air source helps.  A fan set up to blow air through the petcock hole....or an aquarium pump helps to speed things up a bit.  

I can attest to the truth of that, Kreem is junk

And now I wait for 4 days.