Lucious says of tubes; This product has been advertised in the Sunday broadsheets for many years dont know if it works but something must be right to afford that kind of advertising as far as i am aware there is only one company what does it.
The something that is ‘right’ might simply be the power of advertising. The effectiveness of the Doulton Wallguard system was demolished by Barry Richardson in a book titled The Remedial Treatment of Buildings published the 1980’s. They didn’t sue him and Doulton Wallguard as I recall went bust.
The system was invented by Schrijver in Holland before WW2 . Although an old idea I couldn’t find a B. B. Agrement certificate for it. Richardson’s argument as I recall was that the pores in the tubes would fill with salts over time and thus be ineffective after a few years. Today's products might have overcome this as the advertising suggests. .