Assalaamu alaikum,
I would like to know that Is it allowed to put foundation only if u go outside? No make-up nothing else just foundation.
Jazak Allah khair

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

As far as we know, this foundation is a substance that the woman applies on her face to soften the skin and hide the pimples and wrinkles. If the case is as mentioned, the foundation is considered a sort of adornment that a woman is not permitted to apply upon leaving the house, lest non-Mahram men would see her if she was not covering her face. Allaah The Almighty forbade the Muslim woman to display her adornment before non-Mahram men. Allaah The Almighty Says (what means): {And tell the believing women to reduce [some] of their vision and guard their private parts and not expose their adornment except that which [necessarily] appears thereof}[Quran 24:31]

It should be noted that covering the woman's face is a controversial issue among the scholars, but it is obligatory according to the preponderant opinion, as was previously mentioned in Fataawa 83033 and 81554.

For more benefit about the criteria and ruling on wearing make-up, see Fataawa 87339 and 84735.