3M Dynamic Mixing System - the system for efficient filler application

  • Fed up of problematic body filler pinholes?

    Due to the sealed environment of the Dynamic Mixing Nozzle, no air infiltrates the mixing of filler and hardener giving a high-quality finish.

  • Concerned about wasted filler?

    By taking the applicator to the job and mixing "filler-on-demand", you don't lose what you don't use - and additionally, you save working time as you can re-apply filler-on-demand from the cartridge.

  • Tired of the messy filler process?

    There's no scooping, mixing or cleaning up and a faster smoother finish means a final coat of filler or glaze could be eliminated. 3M's enclosed system ensures that your hands stay clean as well as your work area - giving an overall cleaner result!

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Step by Step Guide - Dynamic Mixing System


  • Step 1 - Cleaning of the surface

    Degrease the surface of and around the repair area - follow the recommendations of your paint manufacturer. Well suited for this step are 3M Panel Wipes 34567.

  • Step 2 - Sanding of the repair area down to bare metal

    Step 2 - Sanding of the repair area down to bare metal

    Recommended grids: P80 - P120 (or 150+ Cubitron II)

    Tip: to prevent cross-contamination, always keep abrasives used on steel separate from those used on aluminium!

  • Step 3 - Choose the right DMS filler of your choice

    51002 - General Purpose Filler

    51003 - Heavy General Purpose Filler for deeper dents and a slightly longer open time

    51004 - Fine General Purpose Filler, smoothest to apply and sand, fastest to cure

    51005 - Fine General Purpose Filler - Long. Smooth to apply and sand with a longer open time for larger areas / higher temperatures.

  • Step 3a - Prepare the DMS cartridge

    Step 3a - Prepare the DMS cartridge

    • Remove the cap and attach a nozzle paying attention to match the right size of the openings
    • Assure the nozzle locks into place secured by the hooks.
  • Step 3b - Attach the DMS cartridge to the applicator

    Step 3b - Attach the DMS cartridge to the applicator

    • Retreat the plunger fully into the applicator.
    • Assure that the spindle and the hexagonal nut are aligned.
    • Turn the cartridge into place until it is firmly locked.
  • Step 3c - Adjust the speed

    Recommended for all 3M fillers: use 2.5 - 3 turns from a previously set zero / closed position.

  • Step 4 - Filler application - either... directly onto the object or... onto a spreader

    Advantages of DMS:

    Application tips:

      • Dispensing of exactly the right amount needed
      • Optimally mixed filler
      • Application directly onto the repair area possible
      • No air introduction by filler mixing
      • Process safety
      • Always fully pull the trigger
      • Keep the nozzle immersed in material when applying the filler
      • Ideally dispense 1 cm of material to flush a new nozzle of any air prior to material application to the panel.
      • Open time for the nozzle - ca. 2-3 minutes
      • Apply filler with continuous pressure to form a single globule instead of forming separate beads, this will minimise the risk of trapped air.
  • Step 5 - Curing of the filler

    Usually 10 - 15 Mins at 21° - 24° C - can vary depending on filler used, temperature and size of the repair.

  • Step 6 - Control

    Apply 3M Dry Guide Coat to show the filler structure and allow a controlled fast sanding. Dry Guide Coat also helps to reduce clogging and extends the live of the abrasive.

  • Step 7 - Filler sanding

    Step 7 - Filler sanding

    Use 3M Abrasives 150+ Cubitron™ II by machine or with the right Handblock and dust extraction for a fast shaping of the filler area.

    Re-apply 3M Dry Guide Coat to highlight any deeper scratches and surface imperfections to be removed with finer abrasives.

    In order to prepare the surface for the primer application, reduce any scratches of 150+ by using grade 220+. To achieve optimal flattened results, use abrasive with a hand block.

    The very last step before primer application then needs to be done with a DA machine and Cubitron™ II 220+.

    To improve the adhesion of the primer, it is recommended to key the surrounding edge area with P400/P500.


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