Yes. You need to follow the American Concrete Institute (ACI) 306R-10 Guide to Cold Weather Concreting. This guide will show you how to comply with the required application temperature. You can also refer to MAPEI’s “Installing repair materials in cold weather” reference guide.
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.
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.