Where can we use spray paint
Frost and color - do they get along?
In the cold season there are always problems with the delivery time or availability of colors - the low temperatures and the associated frost are often the cause. Especially in the period from November to March, temperatures as low as minus 20 degrees are possible. The transport of the paints is the biggest problem here, as emulsion paints, for example, are sensitive to frost. Dinova attaches great importance to the fact that the delivered quality is always flawless. For this purpose, we use thermal hoods in logistics and, for complete truck loads, also heated thermal trucks. Thermal hoods protect the goods from the cold for a certain period of time. However, these are not suitable for longer transport routes or long idle times. But why is it so important that paint doesn't freeze? And can paint still be processed at temperatures below 5 degrees? We'll show you what to look out for.
Why can't paint get frost?
Paints consist largely of watery components. Water expands when it freezes and crushes / crushes the binders necessary for the paint. When the polymer particles are destroyed, the properties of the paint change massively. A paint that has been exposed to frost is extremely impaired in terms of adhesion to the substrate to be coated. But the hiding power can also decrease significantly depending on the color. The processing as a whole is hardly possible and a perfect result can no longer be expected. Solvent-based paints and varnishes are only a little more robust against the effects of low temperatures - but here, too, there are limits.
How can you tell if paint has got frost?
As a rule, paint rarely freezes completely in the bucket, but even superficial frost on the edge of the container or on the surface of the paint may be enough to make the material unusable. Depending on the intensity of the frost, the damage can look different. If the material only freezes on the surface, ice crystals can be seen on the edge of the container - even in light frost, the material can already become slightly lumpy. If the container is exposed to the low temperatures for a long time, the paint will freeze through. This is where the components such as pigments and fillers separate and an aqueous film forms on the surface. The visual difference to undamaged material is that the "creamy" or smooth surface of the material is rather lumpy or grainy.
Can I still use frozen paint?
Depending on the intensity of the frost, there is no difference in the processing itself. The material may be more difficult to distribute due to its lower adhesive properties. In addition, it can be lumpy or grainy on the surface - in the cold season these are signs of frost damage. In the case of tinted paint, changes in color may occur depending on the pigment, composition and volume added in the material (to separate the color).
However, if there are any visual anomalies in the container, processing is not carried out in the first place because the specialist no longer uses such a material.
Can you paint at low temperatures?
Yes and no! In order to assess this, it is important to know that when processing the paint, on the one hand the ambient temperature and on the other hand the surface temperature play an important role. In addition to the product to be processed, the area of application is therefore of interest. The product itself always has a recommended processing temperature - a look at the corresponding technical data sheet will help. In most cases, the interior is not critical, as the conditions guarantee optimal processing. However, it looks different in the outdoor area or on the facade.
Facade painting in frosty weather?
In the outdoor area, painting with facade paints harbors great risks during the cold seasons. At 0 to 5 degrees there can be a dew film on the surface that acts as a kind of separating layer between the coating and the surface. This means that there cannot be sufficient adhesion or clawing with the subsurface. In addition to the surface temperature of the component, the drying time is also decisive. Because if it comes to freezing temperatures during the drying phase, the components of the binding agent can separate from each other here as well, causing adhesion problems or an insufficient connection to the substrate. Cracks in the facade, flaking and visible ice flowers on the surface are the possible consequences, so a new coat of paint is inevitable. If the drying phase is too long due to low temperatures and high air humidity, the drying reaction can be chemically or physically impaired.
Store paint correctly - it depends on the temperature!
Often the damage also occurs when the paint is stored. The storage must be frost-free and the ambient temperature should be above 5 degrees. The material should ideally be brought to "room temperature" before processing. Storage in the garage can be critical, as these are often not heated and the temperature can drop well below 0 degrees at night.
If the container has already been opened and has been used for work, contamination of the tools or certain environmental conditions can lead to the material becoming contaminated or, colloquially, "tipping over". Because the water in the products tends to become contaminated by germs and bacteria. For this reason, opened containers should always be processed promptly.
It becomes clear that in the cold season and especially in the transition period certain points should be observed. Be on the safe side and check the framework conditions carefully before you take action. Above all, make sure that you can guarantee a surface temperature of at least 5 degrees during the entire drying phase. This is the only way to prevent unnecessary complaints and not risk your good reputation with your customers.
The specialist is obliged to check the subsurface in compliance with the regulations such as Sections 3.1.1 to 3.1.14 of the VOB, Part C, DIN 18363 or BFS Leaflet No. 20 and must be concerned about conditions outside of the technical leaflets or manufacturer's specifications register or postpone the work.
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