sodoum metasilicate ANHYDROUS powder 100% active metasilicate anhydrous 2 times stronger than pentahydrate, which mean 1 lb of our sodium silicate equal 2 lb of the same available in market our sodium emtasilicate is 100% pure with no water while the market sodium metasilicate is pentahydrate which has 50% sodium metasilicate & 50% hydrate ( water ) 1 lb of our metasilcate equal 2 lb, 10 lb equal 20 lb & 30lb equal 60 lb used in several industrial application such as alkaline clenaers to remove oil and grease, wood cleaners, stain remover , tank cleaning and all purpose cleaners..exc Made in TX USA by american hands