8 hours ago, Stick486 said:

use Vulkem instead..

superior holding power and more flexible...

color match-able too...

"Approved for EXTERIOR USE ONLY!"

John

22 minutes ago, HARO50 said:

"Approved for EXTERIOR USE ONLY!"

John

That's because of the off gassing. But, it would likely be ok in a bathroom.

12 minutes ago, Gene Howe said:

That's because of the off gassing. But, it would likely be ok in a bathroom.

correct...

and as little as you will use... kinda moot...

I don't understand, what flexing? granite doesn't flex. the top is granite , not wood so it will not grow. and the rails under it are free to grow. And if some blocks epoxied to the underside s on the ends with some elongated holes to allow for any small movement everything should hold fine. unless I am missing something.
 

Herb

4 hours ago, Dadio said:

I don't understand, what flexing?

the wood substructure...

1 hour ago, Stick486 said:

the wood substructure...

There is noty enough wood sub structure to make that much difference.

 

http://www.homedepot.com/p/GE-Supreme-Silicone-9-oz-Crystal-Clear-Granite-and-Marble-Caulk-M90036/204723202

9 hours ago, Dadio said:

and the rails under it are free to grow. And if some blocks epoxied to the underside s on the ends with some elongated holes to allow for any small movement everything should hold fine.

the silicone, mastic or Vulkem is/are the blocks...

drilling the granite puts it at risk for breakage...

faster cheaper too...

Edited January 16, 20179 yr by Stick486

8 hours ago, Richard McComas said:

http://www.homedepot.com/p/GE-Supreme-Silicone-9-oz-Crystal-Clear-Granite-and-Marble-Caulk-M90036/204723202

Richard, I like that stuff. Wonder why HD quit selling it.