Refinish the siding if just the repaired portion needs refinishing apply a deep penetrating wood stain in the color of your choice.
How to seal cracks in cedar siding.
If the entire exterior needs to be refinished wash all the siding down with wood surface cleaner.
A full seal is important because any space that is missing sealant is more susceptible to water damage and chemical bleeding.
Wipe the wood with a damp cloth before the caulk sets.
Fill each crack with caulk then use a putty knife to scrape off the excess from around the edges.
Sand the surface of the siding at the area of the crack with a sanding block.
When to seal cedar siding for best results seal before applying the siding to the wall.
Use long horizontal strokes with the block instead of short vertical strokes.
Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.
This way you can completely seal the cedar front to back top to bottom and around all edges.
After it sets examine the crack and if.
Paint works well over it.
Repairing minor defects in cedar siding step 1 use a putty knife to apply exterior wood putty to smaller cracks or holes in siding.
Work the putty down into the holes and smear the putty over the top and edges of the defect.