Al-Brite aluminum de-smut from RD Chemical Co. is formulated to produce a clean, smut-free surface on die-cast aluminum.

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Al-Brite aluminum de-smut from RD Chemical Co. is formulated to produce a clean, smut-free surface on die-cast aluminum.

According to the company, die-cast aluminum is difficult to clean and de-smut properly because the high silicon content in the alloy sits on top of the part and is not removed by most de-smut chemistry. Al-Brite works at room temperature for 60-90 sec, and aluminum parts come out of the de-smut looking as good as any “normal” rolled alloy, the company says.