Sodium hydroxide, also known as lye or caustic soda (pearl).
DANGEROUS GOODS SHIPPING SURCHARGE APPLIES
All orders containing lye will have a $7.50 dangerous goods surcharge added to the regular freight cost. Free Shipping does not apply when purchasing dangerous goods (you will be charged the DG fee only with the normal freight charge free)
Also, due to strict packaging regulations lye can only be sent in 1kg buckets, which means if you order more than 1kg you will receive multiple 1kg buckets.
We only charge one $7.50 fee when you order up to 5kg of lye, so in order to save costs it might be a good idea to buy in larger quantities to save paying multiple surcharges over time.