Older Wooden Windows

• 1). Inspect the window frame for cracked and chipped glazing around where the seal has gone bad.
  
  
• 2). Use your putty knife and remove all loose pieces of glazing material.
  
  
• 3). Clean and brush away any loose particles that still remain with an old toothbrush.
  
  
• 4). Dip the old toothbrush into the can of mineral oil. Brush it onto the space on the wood that has just been cleaned.
  
  
• 5). Estimate how much glazing material you'll need for the can. Roll it in your palm until it is the width of a pencil.
  
  
• 6). Place this pencil width sized glazing over the area cleaned out. Press it down with your fingers.
  
  
• 7). Use your putty knife to press it firmly into place. It will expand as you do this, so trim it with the knife as needed. Make sure the new glaze butts up against the old glaze for a tight seal.
  
  

Modern Windows

• 1). Use your utility knife to cut out any deformed, bowed or wrinkled seal.
  
  
• 2). Cut the tip of your silicone caulk tube at a rough 45-degree angle. Place it in the caulk gun.
  
  
• 3). Place the caulk tube tip where the seal that you cut begins. Squeeze out a bead of silicone.
  
  
• 4). Pull the gun toward you as you caulk. Try to match the bead width to the seal already in place.
  
  
• 5). Smooth out your bead of caulk by dipping your finger in mineral oil and lightly going over the top of your silicone. Let it dry over night before wiping it off.