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!

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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