On the other hand, this guy claims he used 8L of the Dulux sealer for a 18sq m. room so that'd be about 35L for 80 sq m. Hmm.http://sgp1.paddington.ninemsn.com.au/ourhouse/factsheets/db/artanddesign/09/942.asp

Read a few horror stories about painting vermiculite e.g. needs 6 coats. Neighbour says painter used 90L to paint his 80sqm unit. This spec sheet from Dulux implies that 3 coats with about 10L of sealer and 20L of paint ought to be plenty. Not sure what to believe.http://www.duspec.com.au/duspec/file/AUSD1605.pdf