Sealing Knots

Use Zissner’s Seal Coat.

-- Jerry

The BIN Primer is just dewaxed shellac, either clear or pigmented white. There are oil-based and latex primers out there, Kilz being one I have in stock. Rustoleum (Zinsser) also has water and oil-based variants.

The BIN primer will work regardless of the top-coat as shellac is universal in what can go on top of it, though I would typically use a water-based primer with a latex finish, like the aforementioned Kilz or the Rustoleum alternatives. However shellac is a better barrier than the other alternatives, so if you are priming to cover nasty odors or something, then I’d use the shellac-based BIN. Likewise, for your application, I’d stick with shellac…it’s slightly better as a moisture barrier, but it also dries very fast…giving really runny knots little chance of affecting the primer as it dries (which could be a problem with the slow drying oil-based stuff).

The Zinsser Seal Coat mentioned by Jerry is essentially the same stuff as the BIN Primer, perhaps a little thinner than the Bin Primer (though that’s just a guess on my part), and clear like typical shellac.

-- jay, www.allaboutastro.com

Try Putting some super glue on them. That will seal them and also keep them in place if they are loose.

-- Thor and Odin are the greatest of Gods.

I have Zinsser 123 latex based primer
Cover Stain oil based primer

I have a quarter of a can of bin but it’s been sitting in the basement awhile and I’m not sure if it’s usable.

Can I use one of these?

+1 more for zinsser BIN. That stuff is amazing.

-- He who dies with the most tools... dies with the emptiest wallet.

Zinsser Bin is definitely the product to use. Get the Shellac based. The Latex stuff is good for general purpose priming but won’t seal the knots

If it was me, I’d seal the knots with epoxy….You didn’t mention the type of wood you’re using, but I’d mix up a little dust with the epoxy and fill them it…..good to go…...

-- " Don't ever wrestle a pig in a mudhole....he'll be having more fun than you..!!

The wood is dimensional lumber so probably douglas fir or whatever else they make it out of

another ZINSSER b.i.n. here ..pine knots…. shellac based primer two coats an lookin good!!!!

-- IF YOUR NOT MAKING DUST...YOU ARE COLLECTING IT! SOUTH CAROLINA.