How to Properly Seal Nail or Screw Holes on the Exterior of Your Home

Remove a nail that protrudes through the roof using a claw hammer.

Seal the roof nail hole with a small dab of urethane roofing cement. This cement will stick to the existing shingles or roofing material and create a watertight bond where the nail hole is located. Cut open the tube of sealant with a knife and apply it with a caulk gun. This sealant is colored black and should be used for roofing repairs only.

Remove any nails protruding from exterior walls using a claw hammer.

Place a small bead of clear silicone caulk over the hole where the nail was removed. Cut open the tube of silicone with a knife and apply it with a caulk gun. The silicone will dry clear, matching any external wall color of your home.