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Practical Tip: Paint spraying in Summer


Sun worshippers love to see the temperature go up in the summertime. But heat, humidity and dry air mean just one thing when it comes to paint spraying – problems. Evgeny Khmelev, Training Leader at Spies Hecker EMEA, has some tips on how to achieve a perfect spray finish in midsummer conditions.

Conditions in mid-summer make the proper use of hardener and thinner all the more important.

Tip 1: Use the right combination of thinner and hardener!

When the sun is blazing down, getting the right finish depends on the proper use of hardener and thinner. Using a material with a slow setting time, the smoother the application process and the drying will be, even when it’s hot. The designations Extra-slow, Slow, and Fast on the thinner and additive containers from Spies Hecker can help you make the right selection. Permasolid HS Clearcoat Additive 9035 Slow, for example, is good for high temperatures.

Tip 2: Check the humidity!

Humid weather has an effect on Permahyd Basecoat 280/285 and Permahyd Hi-TEC Basecoat 480. The higher the humidity, the easier it is to apply the coatings. With Permahyd Hi-TEC Basecoat 480, for instance, higher humidity means you have to select the appropriate viscosity adjuster.
When it is hot and the humidity is low, water-based coatings will, of course, dry more quickly. The overspray isn’t properly absorbed, which can potentially produce clouding. In order to keep the material open long enough and to achieve good wetting when applying a finish under these conditions, the product has to be properly adjusted.

When using Permahyd Basecoat 280/285 under these conditions, Permahyd Special Water 6002 can be substituted for VE Water 6000. Permahyd Hi-TEC Basecoat 480 can be adjusted using Permahyd Hi-TEC WT Additive 6052. It also helps to add a little 10 Percent Permahyd VE Water 6000. In addition, you can also try using a larger nozzle, but first read the application instructions for the base coat to select the right nozzle.

 "When it is hot and humidity is low, the overspray isn’t properly absorbed, which can potentially produce clouding."

Rising summertime temperatures present the paint-spraying technician with some real challenges.

Tip 3: Spray in the morning!

It gets hottest around noon. Larger or more complicated paint jobs, like three-layer finishes or full repainting, should be done in the morning when it is cooler. On hot days, you should carefully plan booth allocation and the order in which the vehicles are to be handled.

Full-body protection ensures good ventilation, perfect respiratory protection and prevents sweat from dripping onto the freshly applied paint.

Tip 4: Wear full-body protection!

Wearing full-body protection in hot weather is the right choice. It ensures proper ventilation and perfect respiratory protection. It also prevents sweat from dripping onto fresh paint, ruining your work.

Extra Tip: Select the right hardener for Permasolid HS Speed Clearcoat!

There are three hardeners that can be used with Permasolid HS Speed Clearcoat 8800 under the widest range of weather conditions: Permasolid VHS Speed Hardener 3251 Fast is best for low temperatures and low humidity, Permasolid VHS Speed Hardener 3250 for mid-range temperatures and Permasolid VHS Speed Hardener 3252 Slow for use in hot and humid weather.
You can find additional information in the application instructions

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