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Practical refinish tips: Fast substrate preparation with the Standox VOC Xtreme Filler

Standox – the refinish brand from Wuppertal, Germany – has revolutionised surface pre-treatment with the launch of its VOC Xtreme Filler U7600 and the accompanying Express Prep Wipes U3000. Thanks to its fast application and short drying times, the filler can significantly simplify and improve work processes, something that is of interest to most bodyshops. Kevin Welling, Training Academy Manager for Axalta in the UK and Ireland, shares his application tips.

"The VOC Xtreme Filler U7600 is not just a product; it also represents an innovation in the refinish application process," Welling says. "It offers a quantum leap in process times, particularly for bodyshops with a high throughput. The effect is compounded if the filler is used together with Standocryl VOC Xtreme Clear K9580, resulting in an even greater time saving, while still producing excellent quality results."

Extensive tests were carried out with the new filler before it was launched. This testing phase provided in-depth application expertise, which is available to refinishers in the technical data sheet. Welling shares five additional tips for professional refinishers:

  • Tip 1: Follow the datasheets precisely

Two steps in the application of the VOC Xtreme Filler U7600 differ significantly from that of other High Solids fillers: the first is the application of corrosion protection using the pre-treatment wipes and the second is the early sanding after 20 to 40 minutes air drying, depending on the relative air humidity. Experienced refinishers will find both of these instructions unusual. It is very important, therefore, that they adhere carefully to the datasheet specifications to help ensure an outstanding result.

  • Tip 2: Choose a small nozzle

Many refinishers do the filling in the same location where they carry out the pre-treatment. With its low viscosity yet high solids content, the VOC Xtreme Filler U7600 can be applied with a smaller nozzle, for example 1.4mm, at reduced pressure. This creates less spray mist and results in a flat spray, which later reduces the effort required for sanding.

  • Tip 3: Spray thinly over putty areas

Small putty areas should initially be coated with a light spray pass that should then be flashed-off to a matt finish. It is then possible to apply up to three further spray passes in a single application step without flash-off.

  • Tip 4: No weekend drying

The great advantage of the VOC Xtreme Filler U7600 is the ability to continue working quickly. But this also means it should not be dried over the weekend, as other fillers often are. That is because the material will harden to such an extent that it becomes difficult to sand and the sanding paper will wear out faster. As a general rule of thumb, the filler should be overcoated within 24 hours.

  • Tip 5: Speed only when necessary

The VOC Xtreme Filler U7600 is designed to optimise work processes and to make them more economical. These characteristics make it particularly suitable for bodyshops with a high throughput or with large numbers of small damage repairs every day. So for jobs where speed is not of the essence, such as classic car repairs for example, Welling recommends the use of other Standox products, such as the Standox VOC Xtra Filler U7560.

For further information on the VOC Xtreme Filler U7600 and the associated Express Prep Wipes U3000, please visit

About Standox

Standox, one of the global refinish coating brands from Axalta, supports its customers with premium product quality and in-depth consultancy to help obtain the best results. As a leading European automotive refinish brand from Wuppertal, Germany, it delivers innovative product systems, and superior colour-match accuracy and paint technology. Approvals from major car manufacturers reflect the brand’s position as a leading partner to the automotive industry. Standox helps professional refinishers achieve right-first-time results.

Standox VOC-Xtreme-Filler U7600 and wipes U3000

As a product innovation in car refinishing, the Standox VOC Xtreme Filler U7600 and the accompanying Express Prep Wipes U3000 can improve work processes in bodyshops.

Metal preparation with prep wipe U3000

Extremely fast: the Express Prep Wipes U3000 are for use on bare metal.

Standox VOC-Xtreme-Filler U7600 application

The Standox VOC Xtreme Filler U7600 can be applied with a smaller nozzle, for example 1.4mm, and reduced pressure, which creates less spray mist and results in less effort during sanding.