Is there a concrete sealer that shines > 4 months?

[LoneRanger]

So I've got an exposed aggregate driveway and walk. Have used a few different brands of aggregate sealer, and it will have that deep wet appearance looking like a million bucks for a few months then it starts to go away and eventually it looks unsealed again. Last product was bought at a concrete supply store on the advice of a contractor, but same story. Is that just the way it is?

 

[JD4440]

What % solids is the sealers you have used?

 

[LoneRanger]

Says > 25% solids.

Super Diamond Clear is what I used last time, bought at the concrete company:

http://euclidchemical.com/fileshare/ProductFiles/techdata/Super Diamond Clear.pdf

Still faded out after several months. But in it's defense, it says a 2nd coat is optional but I only did one coat. Couple years before used a [different brand] tinted product, streaked it up, will never use tinted again.