We have laid a penny floor and 42 hours ago we sealed it with the glasscast 3 resin. However we are  little bit concerned that 42 hours later, although most of it is rock solid there are still a number of sticky patches remaining is this normal??

Typically at 20C you would expect initial firm hard cure at around 24 hours. 
Cooler temperatures can take a lot longer.

However if it is curing with sticky patches that don't go away, then generally the sticky patches are areas of improperly cured resin. - usually from too quick mixing or quite commonly  scraping the dregs off the side of the mixing bucket  (especially if only one was used) .  The patches are in essence not fully cured..

If you can get fan heaters on it and raise the temperature  then if the error is minor, it may naturally harden, otherwise the only solution is to sand back and re-coat.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant