Plastic cement is a portland based cement used primarily for stucco
applications it for the most part is treated exactly like regular
portland cement as far as mixing and applications. adding a hand full
to a bagged mix of mortar wil increase the stickeyness while adding a
bit of strength. You could also use lime to increase the stick but I
use the cement because in my experiance it really increases the surface
bond strength where as the lime just adds a bit of stick. Depending on
the stone the bagged mix even a "spec mix" is still a little light on
the cement to make a good quick bond.


bdeditch wrote:
I was told by some one that I should add some pure plastic cement to my
mortar to install some cultured stone on a wall, said it would help
stick better. What would be a good amount to add to the mortar mix.
percentage wise?