Topcem Premix is an accelerated-cure screed mortar suitable for bonded as well as unbonded applications. Topcem Premix can easily be screeded or sloped, and has the workability and working time of conventional screed mortars.
You can use Topcem Premix or Mapecem 102 to level your concrete slab. If you have freeze/thaw cycles in your area, substitute the mixing water for Planicrete AC to Topcem Premix or use Mapecem 202.
No, self-leveling products are recommended for interior applications only. You can apply a concrete repair mortar instead, such as Topcem Premix or Mapecem 102.