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I used the alum powder to dissolve a broken steel drill bit in an aluminum object. Alum is said to be harmless to aluminum but will dissolve steel. I mixed the alum with water and submerged the aluminum part in the concentrated alum solution. I used a Pyrex bowl and turned the oven to 240 degrees. It worked like a charm. It dissolved the drill bit and left the aluminum alone. So I am very happy with this product.
Verified purchase: Yes | Condition: New
This was used in my parents house when I was growing up. It's hard to find. It's a great product.
Verified purchase: Yes | Condition: New
I loved it thank you
Verified purchase: Yes | Condition: New
Really good product
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
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