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The Sealing Powder for Freezing Straws seals instantly when it comes into contact with water. This powder is made of polyvinyl alcohol.
Sold in 1 lb. bag.
Sealing Powder for Freezing Straws (125 gram bottle)
Price: $15.50
Sealing Powder for Freezing Straws (1 lb./bag)
Price: $26.50