How To Seal Cracks In Cedar Siding

Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.

How to seal cracks in cedar siding.

Sand 3 inches past the end of the crack. Work the putty down into the holes and smear the putty over the top and edges of the defect. Use long horizontal strokes with the block instead of short vertical strokes. This way you can completely seal the cedar front to back top to bottom and around all edges.

Sand the surface of the siding at the area of the crack with a sanding block. If the entire exterior needs to be refinished wash all the siding down with wood surface cleaner. Fill each crack with caulk then use a putty knife to scrape off the excess from around the edges. Paint works well over it.

Refinish the siding if just the repaired portion needs refinishing apply a deep penetrating wood stain in the color of your choice. Repairing minor defects in cedar siding step 1 use a putty knife to apply exterior wood putty to smaller cracks or holes in siding. When to seal cedar siding for best results seal before applying the siding to the wall. Avoid polyurethane finishes as they can trap moisture below the surface of cedar.

A full seal is important because any space that is missing sealant is more susceptible to water damage and chemical bleeding.