This product is Aquaseal 100, a hydrophobic waterproofing and anti-crack powder admixture for concrete, mortar, and plaster.
It is sold in 500g or 1kg bags.
The recommended dosage is generally 500g per 50kg bag of cement.
It is used to fill pores in materials to prevent water penetration and is suitable for foundations, water tanks, and swimming pools. [1, 2, 3, 4, 5]