Joined: July 2004
||Posted: 25 April 2019,18:26
The 840+ is a one-part polymeric resin mortar and, as good as it is, I would not use it for a driveway. If it was a resin mortar I wanted, I'd go with 850 rather than 840+, as the 850 is a far superior, damned-tough two-part resin mortar suitable for vehicular traffic.
The TuffTop is a cement-based mortar, so completely different and although still applied as a slurry, the clean-up time is far, far greater and there is a HUGE requirement for absolute cleanliness. Having said that, it is possibly the best of all the cement-based proprietary jointing mortars. I have a page in development about Tuff Top - I'm just waiting to get the video and photography finished, hopefully in the nest month or so.
Good resin mortars will always be more expensive than good cement mortars, but that has to be offset against the labour cost, and the need to hire-in a specialist belt cleaner machine to get the best from the cement-based slurries.
If we assume, for the sake of example, a 50m² sett driveway, that could be jointed by one operative using a good resin slurry in about an hour. The pavement can be trafficked in 48-72 hrs.
For a similar driveway jointed with a cement slurry, the actual jointing will take about an hour, but the cleaning will take at least another hour, possibly two, and, in an ideal world, traffic should be kept off it for at least 10 days.
So, while resin costs more, they save money on labour and plant. Cements are cheaper, but require more effort plus that handy little cleaning machine. Only you can work out what works best for you economically.
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