Replacement is the answer.
Fix cracked window putty.
In a well ventilated area prepare a two part epoxy.
Repairing window putty step 1 replacing putty.
Step 3 apply the putty.
Putty in good condition takes longer to remove.
Wear eye protection and gloves.
Wear leather gloves to protect your hands from burns.
If the putty is badly cracked you can pry away large chunks quickly with a putty knife.
Place a drop cloth below the window to catch dust paint chips and pieces of old glazing.
Clean the glass with dish soap.
Wash the glass around the crack with a drop or two of dishwashing soap on a.
If it s a hairline crack.
Step 2 prime newly exposed woodwork.
Don t be tempted to just re apply new putty.
Cracks caused by normal settling or foundation problems or minor earthquakes can appear above windows.
Mix up the two part epoxy.
Repair a cracked window glass tabletop or even a mirror with this easy step by step guide.
Bits and pieces of old putty and possibly glass shards will fly around quite a bit during scraping so eye protection is a must.
To fix these cracks clean and sand the area around the crack.