Having a 1/16-inch unsealed crack around a window is like leaving that window open 3 inches. Decrease your heating bill and your energy use by sealing up air leaks. You will need caulk cartridges, a caulking gun, a putty knife, weather stripping and optional: expanding foam sealant. Tip: Caulking guns with an automatic release create much less mess than simple caulk guns and are well worth the extra few dollars.
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