Anyone familiar with 20-30 year old caulk/sealants? Is this usable for a shower?

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Old 04-08-17, 12:22 PM
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Anyone familiar with 20-30 year old caulk/sealants? Is this usable for a shower?

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Replaced a knob, need to reseal the area. This is all I have, it's never been opened. It says it's for tubs and showers but doesn't say if it's silicone or what, just that you can paint over it in 2-3 days. Any thoughts? If it's usable, any guesses as to how long it will take to cure?
 
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Old 04-08-17, 12:25 PM
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You would probably not want to even consider using something that old. Anything oil based will take 7 or more days to fully cure.

You would probably be lucky to even get that to come out of the tube.
 
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Old 04-08-17, 12:54 PM
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Yeah you're right. I didn't want to open it if it wasn't going to work, but I went ahead anyway and it's so thick and slow it's not really worth it. I'm never sure how long stuff lasts, I've used decade-old silicone sealants before without apparent issue.

The only other stuff we have is DAP '230 advanced latex sealant' and TACC 'siliconized latex caulk'. How long do those take to cure?
 
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Old 04-08-17, 12:58 PM
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You could paint over that in a couple hours. Full cure after 24-48 hrs or so. But I wouldnt recommend it for a tub or fixtures.
 
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Old 04-08-17, 01:05 PM
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Well, it's a moot point because I opened both and they're both shot too :/ I swear this stuff used to last longer.

What should I use for a shower fixture then? 100% pure silicone or something else?
 
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Old 04-08-17, 01:24 PM
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Generally the sealants that are best for bathrooms will have an additive added that helps resist mold and mildew. This might be a kitchen & bath silicone, or a latex for bath, or a grout caulk (sold in the tile aisles). Without seeing what you are doing, or what you are caulking, it's hard to say which is best. If the tile or grout is white, a white bath silicone should work fine.
 
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Old 04-08-17, 01:33 PM
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The old caulk around the bathtub downspout and shower knob escutcheons has dried and cracked/shrunk so it's not sealing anymore (no idea who repaired it last time or what they used). I cleaned out the old stuff but now I need to replace it with something. The tile is white-ish, but I'm more concerned about the sealant's physical characteristics than its color.
 
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Old 04-08-17, 06:25 PM
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You will want a siliconized sealant, as mentioned by Brant in post #6. It will not crack and will stop mold growth if applied to a dry area to begin with.
 
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Old 04-09-17, 07:20 PM
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OK, thanks.

((((random string of text because apparently saying "thanks" or "thank you" is to short to post))))
 
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Old 04-09-17, 07:37 PM
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Nope. The only thing I have used in my 35 year plumbing career is phenoseal..

http://www.homedepot.com/p/Phenoseal...0522/100357228
 
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