Silicone Caulk ??


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Old 11-09-05, 07:20 PM
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Silicone Caulk ??

Nothing sticks to silicone except silicone, right?????
When you Re caulk an area that previously had silicone laid, are you doomed to have to only use silicone? My understanding is that even when well cleaned, silicone leaves a residue (unless you use expensive special purpose silicone cleaner) that will not allow any other type of caulk to adhere to the surface. What's the scoop.
 
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Old 11-09-05, 07:31 PM
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What are you trying to caulk? Silicone caulk is usually only used when necesarry to preform a certain job.
 
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Old 11-09-05, 08:01 PM
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You can prime the area with an alkyd primer, and then acrylic caulk will adhere.
 
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Old 11-10-05, 04:48 AM
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Caulk

I'm a handyman who has a good knowledge of the various caulks and the places for them. I'd rather not use silicone ANYWHERE, but understand you have to for some areas. What I don't understand are the potential limits involved for recaulking after removing old silicone.
So Pro wall guy: Are you saying that alkyd primer will stick to silicone residue?
 
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Old 11-10-05, 07:07 AM
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Alkyld [oil base] primer will stick to old silicone, shellac based primers will stick better. It may require 2 coats.
 
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Old 11-10-05, 04:07 PM
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Yeah, Id cut out as much of the caulk as possible, and sand it real good with 80 or 100 grit sandpaper. A medium or rough sanding sponge would work too. Dust it off, and prime with BIN or another alkyd/oil type primer.
 
 

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