Why are WOWA Sealants not popular?

That's not really true--the VOC regs have just forced the use of different solvents (these are usually more expensive or don't have ideal properties for the application). It's true that the regulations seem to have shifted more sealants to water-based formulas (most sealants seem to use "volatile" solvents and "water" solvent in combination, as you noted) but Collinite, being a wax, is IMO still a "solvent-based" LSP.

Are you talking about their liquid waxes, paste waxes, or both?
 
Are you talking about their liquid waxes, paste waxes, or both?

Both. Water may be a solvent, but not for wax, right? To be fair I only have the pre-VOC versions of Collinite (um...I might have bought a few extra bottles of 845...), but IIRC they only changed the solvent they used, they didn't "add water".
 
Just for fair disclosure, I think I should tell everyone I'm solvent based.

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