What exterior sealer should i use on cedar wood?

hemp shield, hemp oil works great on cedar

Cedar has tannic acid that protects it from weather and insects ect. If it’s being used outside oils are short lived and have to be renewed frequently. If you want to add a heavy duty finish check out Spar varnish.

-- W James Brokenbourgh Custom furniture maker http://artisticwoodstudio.com/

In my experience hemp oil will last better than spar varnish, i have used both

mesquite22
I can’t debate it because I have never used hemp oil ,I’ll certainly take your word about that.

-- W James Brokenbourgh Custom furniture maker http://artisticwoodstudio.com/

Try Cetol finish.

Good luck.

-- Rick Gustafson - Lost Creek Ranch - Colorado County, Texas

I use General finish outdoor oil.Haven’t had any problems yet.

polyurathaine will yellow in the uv rays

No matter what you use it will grey unless the product has UV inhibitors and they make UV polyurethane.

-- -- Rick M.

Sikkens Cetol Log and Siding.