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. In addition Ceiling Pro 5 in 1 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 recoat time, low odour and ultra low VOC content. *Once dried the paint film is classed as a treated article and contains the surface biocide 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one 0.04% by weight.