Thermoplastic flame spraying: common myths, real limitations and what you need to know before choosing

Thermoplastic flame spray technology is increasingly being touted as one of the most advanced surface protection solutions. However, as interest grows, so too do a number of myths, false expectations, and false comparisons to other coatings.
To make the right decision, it is important to know not only the advantages, but also the limits of the technology and the appropriate application conditions .

Myth No. 1 - thermoplastic coating is suitable for all surfaces without exception

Although the technology is very versatile, it requires proper surface preparation .
The surface must be:

  • mechanically cleaned (abrasive cleaning);

  • dry;

  • stable (without crumbling or delamination zones).

If the base is weak, no coating, even the most advanced, will ensure durability.

Myth #2 - It's just another type of "paint"

Thermoplastic flame retardant spray coating is not a paint .
Differences:

  • it does not dry, but hardens immediately ;

  • the layer is thick and uniform;

  • no solvents or chemical reactions;

  • the coating fuses with the surface thermally, not chemically.

This is more like a technical protective coating than a decorative finish.

Myth No. 3 - Thicker Coating Is Always Better

This is one of the most dangerous myths.
Incorrectly selected layer thickness can:

  • increase material costs without real benefit;

  • cause unnecessary weight to the structure;

  • make future repairs more difficult.

Professional application always relies on:

  • the level of environmental aggressiveness;

  • mechanical loads;

  • operational purpose.

An important aspect that is rarely talked about is repair options

One of the biggest advantages of thermoplastic flame spraying is local repair without removing the entire surface .
Damaged area:

  • heated;

  • covered with a new layer;

  • blends with the old coating without seams or borders.

This fundamentally distinguishes this technology from epoxy or polyurethane systems, which often require complete renovation.

Working speed - not only convenience, but also economy

For instant hardening:

  • structures can be used on the same day;

  • no need to stop production or traffic;

  • downtime costs are reduced;

  • Project deadlines are shortened.

This is especially important in infrastructure, industry and water management facilities.

When is this technology not the optimal choice?

Thermoplastic flame spraying technology is not intended for :

  • for very thin decorative elements;

  • for surfaces that cannot be heated;

  • for situations where an extremely thin, almost invisible coating is required.

In such cases, it is more rational to choose alternative solutions.

Long-term perspective: not price, but cycle costs

Although the initial investment may seem higher, in the long run:

  • the number of repairs is reduced;

  • does not require frequent updates;

  • lower operating costs;

  • longer service life of structures.

Therefore, this technology is usually chosen not based on "cheapest now", but on the lowest cost over its entire life cycle .

Conclusion

Thermoplastic flame spraying technology is not a universal solution for all cases, but it is an extremely powerful tool when used properly.
Correctly selected application allows for high resistance, fast work completion and real economic benefits.

That is why a professional assessment before work is the most important step in achieving a long-term result.
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