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Old 12-18-2008, 01:09 PM   #1
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Caulk


I have some nails on apron flashing that need a little caulk, my question is what is the difference between exterior window caulk and roof caulk other than the color?

It seems both are used for similar applications, but am curious as to the specific properties of each.

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Old 01-07-2009, 02:24 AM   #2
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Caulk


The roof caulk could have more uv resistance to it.

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Old 01-07-2009, 07:33 AM   #3
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Caulk


Roof caulks can often be urethane based to be compatible with roofing products. Window caulks are often silicone or latex based. If you are caulking to glass, wood or metal, use silicone or latex. If you are caulking to anything that contains any oil bases like asphalt, or to masonry use urethane.
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Old 01-07-2009, 08:28 AM   #4
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Caulk


and always remember the good caulks are usually the expensive ones
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Old 01-07-2009, 05:08 PM   #5
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Caulk


Quote:
Originally Posted by strublesiding@optonline.n View Post
and always remember the good caulks are usually the expensive ones
With all due respect, that is NOT a good reply. Glues and adhesives must always be properly chosen by their chemical composition to achieve good results for each application. Price has nothing to do with the equation.

Maintenance6 has the right idea..


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