je stručni izraz, to je beton koji ne zahteva nikakvu završnu obradu već ostaje onakav kakav je i bio nakon skidanja oplate.
http://www.scribd.com/doc/39063300/Rjecnik-ENG-HRV-Strukovni
fair faced concrete - natur-beton

http://www.mucic.hr/novi/index.php?option=com_content&task=v...
Predgotovljene AB konstrukcije
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Proizvodnja AB fasadnih panela je razvijena do visoke razine kvalitete, bilo da se fasadni paneli proizvode samostalno ili u kombinaciji sa drugačijim fasadnim oblicima i materijalima (npr. aluminij, kamen, staklo i sl.). Mogućnosti završne obrade fasade su raznoliki tako da se prema želji investitora završni sloj izvodi u pranom kuliru (raznih boja i tekstura), natur beton te štokani paneli u raznim bojama kulira.

http://www.google.rs/url?sa=t&rct=j&q=&esrc=s&source=web&cd=...
debljina AB ploče 19,00 cm (natur beton)

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Note added at 57 mins (2014-05-08 18:12:11 GMT)
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Ne mora nužno da bude glatki, gladak je ukoliko je glatka oplata. Može npr. da bude i kanuliran; bilo kakva tekstura površine oplate se "preslikava" na površinu betona; ovo je sve natur beton:
http://www.plasmacem.com/de/q,print/der-beton-fur-schone-nat...

Pogledajte ovde:
http://www.behance.net/gallery/Fair-Faced-Concrete-Repair-No...
The Oriel Mostyn Gallery was designed and built as a fair faced board marked finish in-situ cast concrete with the board marking being accentuated through grit blasting of the timber. White+Reid were brought in to carry out a 6 week repair programme to the fair faced concrete. Typical repairs were honeycombing, grout loss, damage to arris edges and staining. To achieve the replicated board marked finish, the repairs were hand finished by trowel in the texture, line and shape of the surrounding grain.