Does lime paint need a primer?

Lime paint is traditionally applied thinly, in the form of lime milk. Several layers on top of each other result in an opaque surface, whose fine crystals reflect the entire spectrum of light: this looks very aesthetic when properly handled. But before it comes to the actual painting, the question comes up: Do I actually need a primer for my lime paint?

In these cases, a primer for lime paint is appropriate

Sometimes lime and loam plaster are combined, especially in monument protection, when it comes to imitating historical conditions, this has become naturalized. Not only in this case, a primer is often necessary.

undergroundprimerWhen priming pay attention!
clay plasterthin layer of lime-clay mixturealso possible: work in the first thin layer of lime thoroughly with a brush
plasterboardDeep base (plastic base) or KalkkaseinAbsorbency should decrease significantly
mineral undergroundKalksinterwasserWear protective clothing!
whitewashno needremove loose paint beforehand

In case of doubt, you would rather get professional advice before applying your lime paint with or without a primer to a substrate. A small test sample gives information about opacity and durability.

This is how the lime paint binds perfectly

The setting process of the paint can be positively influenced by pre-wetting or priming. Since lime paint solidifies by chemical reaction with the carbon dioxide in the air, it is important that the fresh paint does not dry too quickly.

If the water escapes too quickly from the paint, then the setting may remain incomplete, resulting in reduced abrasion resistance. For this reason, the surface must not suck too much, a pre-wet before painting is advantageous.

Even very diluted first paint jobs ensure that the water remains in the lime paint for a long time: they serve as a kind of primer, which initially saturates the absorbent substrate. Apply lime paint preferably with the brush!

Tips & Tricks

For particularly demanding substrates, the painter in former times liked to apply a thin layer of sweat soaked with lime paint when still wet. Working "in fresco" gives an excellent binding power!

Video Board: Colored Limewash Step-by-Step