tulekindlast materjalist (tulisest) tellis, mida toodetakse tulekindlast savist; tulekindlate telliste temperatuuritaluvus on vähemalt 1500 °C ja neid kasutatakse metallurgiaseadmete (ahjude, koppade) vooderdamiseks (vt tulekindlus), a refractory brick, often made from fireclay, that is able to withstand high temperature (1500 to 1600 oC, or 2700 to 2900 oF) and is used to line furnaces, ladles, or other molten metal containment components (see: refractoriness)