Waterproofer / plasticiser volume

[Markathorpe84]

Hi,
Getting ready to have my first sand/cement render attempt (DIY) - I’ve got so much useful info from you all but have one final stupid question I can’t seem to get an answer to.

My waterproofer and plasticiser both state quantities based on the amount of cement used - eg per 25kg bag - is this as simple as it sounds, or is is per 25kg of mixed render/mortar?

Can’t quite Wrap my head around The fact a mix with more sand would therefore mean less waterproofer in the bucket overall that a much more cement based mix - stupid question, sorry!

 

[dontbelieveawordofit]

what are the specific instructions on the product?

 

[lostinthelight]

Similar question a few weeks ago, https://www.diynot.com/diy/threads/built-using-too-much-plasticiser.541196/

 

[Markathorpe84]

Ahh, looks like it’s the same product too! 85ml and it’s def Bostik! Thanks