Wear eye protection and acid proof gloves.
How to seal pine siding.
Wait until the knots are sealed before priming and.
Avoid splashing the mixture onto adjacent surfaces.
Then caulk all joints with a high grade 50 year paintable silicone or polyurethane product to prevent water from getting behind the siding.
Instead start the edge by stapling the sheet to the interior face of a stud then tuck it to the sheathing and side staple it to the side of the stud move across the bay to the other sheating stud corner and staple it there then wrap the stud side stapling it to the to other side of the stud etc.
Yes it really works and is easy to apply.
Sorry gary just found your question.
To remove the stain clean with a solution of oxalic acid dissolved in warm water.
Four ounces to one cup of water.
I recently had a coffee table made from painted barn wood siding by amish friends.
Apply stain after after sanding the wood and before applying shellac.
Apply the stain to the front of the board before sealing the back and edges and then let it dry.
However the result is a soft sheen with most of the original color remaining.
Contact with moisture causes the fastener to oxidize leaving streaks.
There is no hard finish and water and stain resistance is low.
Caulk any joint that allows this to happen.
On jan 21 2019.
Butt the siding next to each other so you can cover more than one piece of siding at a time with the sealer.
Before applying your finish thin a small amount of polyurethane with mineral spirits in a 2 1 dilution ratio.
Seal stained wood with two coats of polyurethane.
Lay the siding out on sawhorses or on a horizontal surface to make applying the sealer easier.
Tinting a standard white primer a shade or two lighter than the finish coat improves coverage.
Like all other finishes it slightly enhances the natural pigment in pine.
The sealant helps the finish stick better to the pine and last longer.
I would like to clean it before sealing it but not remove the red color.
Dip a paintbrush in the sealant and apply it to your object s surface in long strokes.
Using a standard sized roller instead of a short roller speeds the process of applying the sealer.
If you re going to air seal the siding with broadsheet goods like housewrap don t cut it into strips caulk them.
If the boards will not take abuse consider finishing the bare wood with old fashioned paste wax for wood.