Zinsser Ceiling Pro 5-in-1 is based on ground-breaking paint technology that effortlessly provides a perfectly finished ceiling every time. It adheres to any surface, seals stains (including water and smoke stains), primes and finishes whilst bridging hairline cracks. Ceiling Pro contains a biocide that protects the dried coating against fungal degradation, prolonging the life of your painted ceiling. These outstanding features combine with a 1 hour re-coat time, low odour and ultra low VOC content. Water-based, non yellowing finish. Touch dry in 30 mins, hard dry in 4 hours, re-coatable in 1 hour. Thinning - up to 5% with clean water.