The phrase "thick foundation" is correct and usable in written English.
It is most commonly used to describe a type of makeup or cosmetic product used to create a smooth and even base for other makeup products. Here is an example of how it could be used in a sentence: "Her makeup looked flawless thanks to the thick foundation she applied to her skin."
The doctor's face was caked in thick foundation that creased into fine lines when she smiled.
The first layer rested on a thick foundation of stone that prevented settling of the mortar bed and the formation of cracks.
Beck's books are built on such a thick foundation of bullshit, already bought and paid for by years of conservative media, that you cannot easily dislodge their logic.
It was presented in Ref. (Rashed 2005a, b; Nazief et al. 2010) that the Reissner plate-bending model is more refined and accurate in theory for thin slabs and thick foundation plates.
As Maryani tells me about the difficulties of being a single mother, tears spill onto her cheeks and muddy her thick foundation.
To protect the foundation and manage settlement in the sub-soil, a series of 50 m long steel tubes was installed horizontally around and beneath the clock tower's 3 m thick foundation.
(One potential solution is for blades to arrive in segments and be assembled on site; the tubular towers are already shipped in several sections, but even they face limits because taller towers generally need very thick foundations).
The law of conservation of charge, the eponymous stove, the precise path of the Gulf Stream: Hyde shoves aside each of Franklin's "discoveries" to uncover thick foundations of pre-existing knowledge and scientific collaboration.
Consider switching from thick foundations to mineral make-up, to avoid clogging the pores.
As is her bronze face, separated from her white chin by a coin-thick foundation tidemark so clearly defined it looks like it's been drawn in by the UN to resolve a border dispute.
You may find that the thicker foundations work better for your skin type if you have big pores, but thinner varieties will work great for just evening out your skin tone.
