Repairing minor defects in cedar siding step 1 use a putty knife to apply exterior wood putty to smaller cracks or holes in siding.
How to seal cracks in cedar siding.
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.
When to seal cedar siding for best results seal before applying the siding to the wall.
Simply apply this inexpensive filler into the cracks to seal.
Refinish the siding if just the repaired portion needs refinishing apply a deep penetrating wood stain in the color of your choice.
Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.
After it sets examine the crack and if.
Fill each crack with caulk then use a putty knife to scrape off the excess from around the edges.
Work the putty down into the holes and smear the putty over the top and edges of the defect.
Avoid polyurethane finishes as they can trap moisture below the surface of cedar.
If the entire exterior needs to be refinished wash all the siding down with wood surface cleaner.
Sand the surface of the siding at the area of the crack with a sanding block.
This way you can completely seal the cedar front to back top to bottom and around all edges.