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Münch Chemie International GmbH

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Mould sealer for tooling boards Mikon® 399 MC

Best quality and high process reliability in model and mould construction


Münch Chemie International

  • Low material consumption (approx. 25 g/m² Mikon® 399 MC instead of 30-40 g/m² wax-based mould sealer)
  • Minimal effort (ready-to-use product, max. 2-3 coating layers, fast drying/curing time, no laborious after-treatment required after application of sealer)
  • Application via all commonly used methods such as spraying, painting or wiping
  • High resistance against increased temperature and chemicals
  • Both colourless and coloured mould sealer available
  • Significantly improved process reliability (mould sealer perfectly matches semi-permanent release agents from Mikon® product series)
  • Enhanced overall quality of moulded parts (increased surface quality, maximum accuracy of fit)
  • Excellent value for money
  • Increased overall efficiency

The Challenge

Münch Chemie International

Tooling boards of various densities are commonly used in model and mould construction. These materials need to be treated with a sealing compound prior to the application of mould release agents in order to avoid absorption of the release agents by the pores.

Traditionally, moulds have been sealed by multiple layers of a multi-component automotive coating. This procedure was very time-consuming and laborious as the mould had to be grinded and polished after each single application. The adhesion strength of release agent to the coated surface was rather low and the coating layer exhibited a poor chemical resistance against both the release agent and the phenolic or epoxy resins used for the manufacturing process. Hence, moulded parts were of low quality.

Although preparation time was significantly reduced, the more recently developed single-component wax-based mould sealers required equally high efforts for processing as a complete sealing of all pores was only possible with 20–30 coating layers. This build-up was particularly problematic for the manufacturing of parts that were supposed to exhibit a maximum accuracy of fit.

In summary, the overall process reliability for both sealing systems was very low.

Our Solution

Münch Chemie International

The team of Münch Chemie International GmbH analysed the manufacturing process in model and mould construction in detail. Our chemists paid particular attention to board
materials, resins and release agents as well as chemical and physical interactions correlated to the most common processing conditions. Based on the analytical findings, a range of raw materials suitable for homogenous sealing of tooling boards was selected.

An innovative single-component mould sealer, available in colourless or black version, was formulated which was easy to apply onto the boards and exhibited fast curing times. First results on the laboratory scale were promising: A very smooth homogenous surface was obtained with only two layers of the new mould sealer named Mikon® 399 MC which could be applied either by spraying or painting / wiping. Microscopic analyses proved that all pores were evenly sealed despite the coating thickness being only ≤ 1 µm. After drying / curing at room temperature for approximatively 5 minutes this formulation exhibits unique properties, such as a high gloss finish, without the need for any sanding or polishing. Furthermore, subsequently applied solvent- or water-based semi-permanent release agents exhibited very good bonding on the sealer.

Additional plant trials confirmed these results and further demonstrated that the straightforward handling without the need for any preparation time or post-processing was particularly advantageous. Upon application of the new sealer in combination with release agents from our Mikon® product series both the overall process reliability and quality of moulded parts with regard to surface quality and accuracy of fit remarkably increased. Due to its high
resistance against chemical and physical impacts the new sealer allowed for several
consecutive demouldings for the first time.

In conclusion, Münch Chemie International GmbH is the first manufacturer of release agents across the globe to offer customers an innovative easy-to-handle mould sealer for tooling boards which guarantees a high process reliability and quality, thereby allowing high cost savings.

We sell our specialty release agents worldwide.

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