Finish / Seal Crosscut sled

  • Advertise with us

« back to Finishing forum

Forum topic by kmerkle posted 10-14-2014 04:31 PM 721 views 0 times favorited 6 replies Add to Favorites Watch
View kmerkle's profile


32 posts in 1758 days

10-14-2014 04:31 PM

Topic tags/keywords: sealer humidity finishing

I made a crosscut sled from 1/2” baltic birch plywood with with oak runners. It worked great when I made it, which happened to be in the Spring when the humidity in SC is moderate. However, my shop is in my garage and my sled swells with the humidity and becomes nearly unusable.

I’m planning to set it out in the sun this Fall on a nice cool day, let it shrink back to original size, and then seal it with something that will hopefully prevent it from absorbing moisture and swelling when it becomes humid again.

My question is, what is the best thing to seal it with? Shellac? Polyurethane?



-- Every project is perfect until it's started.

6 replies so far

View Bill White's profile

Bill White

4408 posts in 3384 days

#1 posted 10-14-2014 04:39 PM

Put some shellac on it. Let it dry, then wax it.


View bondogaposis's profile


3972 posts in 1775 days

#2 posted 10-14-2014 05:43 PM

If that doesn’t work you may want to replace the runners w/ something stable like aluminum or composite. A finish will slow the reaction to humidity but not stop it.

-- Bondo Gaposis

View ChefHDAN's profile


798 posts in 2273 days

#3 posted 10-14-2014 07:13 PM

I use wipe on poly and wax, for runners I have corian counter top scraps which work really great for the runners, and you can machine it easily just like it’s wood, wear a mask though cause it really stinks.

-- I've decided 1 mistake is really 2 opportunities to learn.. learn how to fix it... and learn how to not repeat it

View Rick  Dennington's profile

Rick Dennington

5108 posts in 2618 days

#4 posted 10-14-2014 07:40 PM

A 50/ 50 mix of tung oil and mineral spirits…..I use it on all my sleds…..

-- At my age, an "all--nighter" is not having to get up and pee...!!!

View Mainiac Matt 's profile

Mainiac Matt

5959 posts in 1752 days

#5 posted 10-14-2014 07:45 PM

I’ve had good luck with both UHMW runners (cut oversize and hand planed to a snug fitting width) as well as with extruded AL T-track.

-- Pine is fine, but Oak's no joke!

View kmerkle's profile


32 posts in 1758 days

#6 posted 10-14-2014 07:46 PM

Thanks guys!

-- Every project is perfect until it's started.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics