You want to fill a gap in an internal wall thats no bigger than 50mm
You will need
Step by step process
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Step 1
Ensure that the gap and wall around it are clean and free from grease and loose material.
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Step 2
Remove lid and stir into a smooth paste.
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Step 3
Press the filler into the gap using a filling knife, and smooth off with a wet knife. This lightweight filler allows deep holes to be filled in one application and should require no sanding.
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