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Re: Silicone sealant (caulk)

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In a message dated 11/9/2004 5:02:59 PM Eastern Standard Time, mailbox(--nospam--at) writes:
I was under impression that silicone-based fillers are quite inert.  Oh well.
Now, how to distinguish between the acid-curing and "concrete-friendly" silicone compounds? 
What kind of filler material for residential or commercial concrete slabs would you recommend
Actually, most (if not all) of the new high movement (100/50) caulks are silicones.
If it is acid cured, it will probably say something like "not recommended for porous substrates", it should also say it is recommended for copper, etc.
A two-part polyurethane sealant works in about 95% of the typical concrete slab applications.  
But the material is not the only concern - things like the age of the concrete,  temperature cycles, etc., are important.
Gail Kelley