That’s dr. fixit 105 powder waterproof
what it's used for:
this is an integral waterproofing compound for cement. you mix it directly into plaster and concrete.
from the pack: integral powder waterproofing compound for plaster & concrete
main uses:
1. waterproofing plaster - for external walls, bathrooms, kitchens to prevent water seepage
2. waterproofing concrete - for water tanks, roofs, foundations, basements, bathrooms
3. prevents dampness and seepage - stops water from passing through walls/floors
4. reduces cracks - makes plaster and concrete more dense and workable