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DIN norms have mostly become EU-Norms (EN).
For Ceramic Tile Adhesives it is EN 12004, it has two Classes (C1 and C2) for basic and high-performance CTA. In Germany, there is also a thing called Flexmörtelrichtlinie for flexible CTA with deformation values far higher than C2 - I don't know if this exists in english.
About BS-Norms, I don't know any details - I would recommend to go by the Eu norms.




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There are also ASTM requirements established (ASTM 118.6)
Cement paints are also specified by BS 4764 but according to my experience such a paint (if you follow the specifications) has a rather poor workability a strong tendency to efflorescence (probably as a result from the incorporated CaCL2) I recommend you should contact Wacker Specialties for a proper starting formulation.
There was also an ASTM standard for cemtbased paints established, which was quite similiar to the BS standard, but I don`t know the number.
best regards
Klaus




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