Conversion Varnish
Conversion varnish is a two-part cabinet finish. A catalyst is mixed into the varnish just before spraying, and the two react to cure into a very hard, durable film. It is often cited as one of the most durable finishes for kitchen and bathroom cabinets because it resists moisture, heat, cleaners and everyday scuffs.
It is applied in a shop. The mixed finish has a limited pot life, meaning it must be sprayed within a few hours, and it needs controlled conditions and good ventilation, which is why you rarely see it used on site.
How does it compare with lacquer? Both can be sprayed in smooth coats over stain or paint. Conversion varnish is generally harder and more resistant to moisture and chemicals. Catalyzed lacquer is also durable and is often easier to touch up and repair. Acrylic polyurethane is another option: a water-based finish with lower odour and easier clean-up, though it is generally not as hard as a two-part catalyzed finish. All of them come in a range of sheens. The right choice depends on where the cabinets will live and how they’ll be used.
One point to know: some conversion varnishes release formaldehyde as they cure, so ask your cabinetmaker about low-emission options and about ventilation during curing.
Questions about finishes for your project? Start with our bathroom vanities or custom kitchens.
How we use it: Finishes are chosen per client request. Catalyzed lacquer and acrylic polyurethane are options; see Catalyzed Lacquer.