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posted for all of us...

On Thu, 22 Jun 2017 08:53:22 -0500, Terry Coombs
wrote:

On 6/22/2017 8:39 AM, songbird wrote:
i've tried now a few times to get this to
stick to the concrete, but it doesn't. i've
even roughed up the surface a bit.

using mortar mix.

is there something i can add to the mix
that will help it stick? or should i use
something else?

i like the mortar mix because it is smooth
and sets up nice.

hope to do this again this week because
the car that is usually in and out of the
garage is gone and it can cure before getting
driven over again.

songbird

Try using some Titebond III in your mix , and coat the area with some
before you put the mix in place . Roughing it as you've done can help .
Also , "grinding" the mix into the surface can help .
Etch the old concrete, dampen it and brush it with "bonding agent"
which is basically titebond, and mix "bonding agent (titebond) as part
of the water when you mix your concrete/mortar. I'd recommend using a
"grout" mix over mortar, myself.

IMHO this is the best solution.

--
Tekkie