Stain lasts about three years, and is more scuff-resistant than clear sealer.
Once complete, a clear sealer is usually added to prevent flaking.
Wooden ladders can be coated with any clear sealer or finish.
I know of no clear sealer or coating that is completely nonflammable.
There are a number of clear sealers sold for use on masonry that will brighten the color.
Is there some kind of clear sealer I can apply that will keep the water out?
For eight years, we coated these with a clear sealer, applying it twice a year.
Also, you might try using a clear sealer on the stone so it will not absorb and hold water the way it now does.
But I would advise applying a coat of the clear sealer first as a primer.
Now we are ready to apply a clear water-repellent sealer.