Have had some cracks in concrete where I could use a tube of concrete
repair (and a caulk like gun). However these cracks are smaller and
there is no way to get caulk or cement in there.

I read in some magazine some time ago there was some liquid based
sealants or crack fillers that would harden so that the crack would
perhaps not widen or get worse as easily as if left alone.

Anyonme ever use Crack Filler Liquid Cement by Dap???

I was thinking of the 2nd item on this page
http://doityourself.com/store/drivewayrepair.htm (Crack Filler Liquid
Cement )

Thanks for any help
Patty