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This claims to be a 4-in-1 concealer, as it can act as a concealer, blender of fine lines, lipstick base, and eyeshadow base.
I don`t know much about the claims other than concealer (as I haven`t tried them out) but the concealing value of this product is next to nothing.
For a product called the eraser, you`d think that it would actually, um, erase. It doesn`t, however, it is very light coverage and does not layer well, resulting in dissatisfaction for the user if trying to cover up a scar, mark or blemish.
If you want a good concealer, going with something that`s a little less liquid-y and a little more solid (for example NARS` concealer) will probably yeild better results.
Source link: http://tartecosmetics.com/tarte-item-the-eraser