Johnstone's Trade Aqua Undercoat is a low VOC content finish. A product which is thinned with water and is applied by brush. 
Suitable for interior and exterior use. Touch dry in 1-2 hours and recoatable after 4-6 hours. 
 
Quick drying so ideal for under water and solvent based trim finishes. Maintains gloss levels of Aqua Water Based Gloss Topcoat. Low odour.