Alum Powder

Size:1lb bag ( $4.99 /lb)

Delivery Options

Save when you buy in bulk

Shelf Life: Store at room temperature for up to 1 year.

Origin: United States

Product ID: 7386

Alum powder is a crystalline powder that is most commonly used in pickling; it keeps pickles firm and crispy.


Alum powder is often used to firm and crispen pickles by letting them soak in a sealed brine solution of water, vinegar, salt, spices, and alum powder for several weeks. Cucumbers should be pickled at the peak of freshness because they will become soft after a few days. Use up to 1/4 teaspoon of alum per pint of solution.

Alum’s tissue-shrinking properties gave it a starring role in multiple episodes of the cartoon Looney Tunes in which alum was shown to comically shrink the characters’ heads and pucker up lips.

Click here to related CA Prop 65 Warning

Ratings & Reviews

5 out of 5 stars

– August 1, 2023

Carolyn, Kirkland, Washington

Verified purchaser

Thank you for the prompt shipment of alum, so our school can make LOTS more playdough. The alum is a "secret" ingredient which gives us smooth and pliable playdough every time. - Longtime Purchaser

Featured Review

Size: 5lb bag

5 out of 5 stars

– October 31, 2023

Preston, Chapin, South Carolina

Verified purchaser

shipped on time. Was exactly what I was looking for.

Size: 25lb case

Showing 2 of 145 reviews

Customizable box: a big white box, with six colorful mini boxes filled with nuts.

Build Your Own Box

Customize with 50+ different options of nuts, dried fruit, chocolate and more.