production injection

Our production facilities combine the know-how of our craftsmen with an up-to-date production infrastructure. We are capable of handling small, medium and large production volumes.   Indupol is vertically integrated and, besides composite and PU production, we have our own specialized departments and departments for R&D and quality control.

Model and Mould Construction

Indupol makes its own moulds in a laminate thickness that results in moulds with high quality and a long life span. Because this is one of our core competencies, moulds are made by craftsmen who have received effective “in-house” training.








Laminating Techniques

Hand Lay Upproduction HLU

The first step in creating a high-quality finish involves applying a gelcoat to the mould. Layers of glass fibre are then
impregnated with resin to obtain the desired product thickness. Curing is then automatically activated via the catalyst in the resin, by which the fibre-reinforced composite hardens without external heating. During this process, all trapped air is removed manually using brushes or rollers to complete the laminate structure. This is the most classic way of producing polyester parts and has proven its reliability over many years.



Spray Upproduction sprayup
The first step in creating a high-quality finish involves applying a gelcoat to the mould.  The chopped fiber glass and resin are then applied to the mould using a ‘spray up’  gun. This gun chops a continuous string of fibre glass and squirts it, together with the resin, into the mould to obtain the desired thickness. The curing is then activated by the catalyst in the resin, whereby the mixture hardens without external heat. During this hardening process, rollers are used to consolidate the laminate. The main advantage of this process is the speed with  which the composite material can be applied.



Vacuüm Techniqueproduction vacuum
This technique involves creating a vacuum between the mould and a sealed foil. Once the gelcoat is applied, fibre mats are arranged in the mould. The vacuum is then created, after which resin injection is started. Due to the vacuum, the resin will flow through all the fibres until the entire product has been impregnated. The main advantage of this production technique is the higher degree of automation, which means lower labour costs and fewer emissions.




RTMproduction RTM
Low Pressure Resin Transfer Moulding is an
increasingly popular  technology in the
composite industry.  In two-mould parts,
the glass fibre mat is applied manually. Once the moulds have been sealed, the  resin is injected through holes in the mould. The resin then follows a flow path that must be precisely designed, in order to impregnate all fibres and to
prevent them from shifting due to excessive pressure applied by the resin. The main advantage of this production technique is the ability to control product thickness and the high degree of automation, which means lower labour costs and fewer emissions.



Polyurethane foam                                  production pur    

We have been developing our Polyurethane activities for many years. We use PU for manufacturing products, foam seating and sandwich solutions. We produce polyester products in complicated shapes, with different radii and fully injected with PU foam.

Polyurethane structural coating             

We produce PU products that are impact-resistant, including cladding for luggage compartments in buses, as well as
fully-assembled doors for cars and a variety of covers. PU can be used for an extensive range of applications.

Polyurethane coating                                                                               

Polyester interior parts for public buses can be coated with an extremely tough and wear resistant PU coating. This is used on hybrid “tram-buses” in cities all over Europe.

Wood Department

production wood depOur wood department still offers the craftsmanship needed to make models using traditional techniques. Furthermore, we produce wooden parts for mould construction, packaging, inserts, etc.  Besides wood, we also process foam for a variety of purposes.







Metal Department

The metal department contains skilled and well-trained craftsmen who use a computer-controlled punching machine and an entire machine park to produce metal parts like inserts, chassis extensions, frames for moulds, custom-designed transport brackets, etc.

This department is located in a separate building.


production assemblyUnlike other polyester manufacturers, we have an extensive assembly department where we assemble complete products. We purchase the various components and take care of logistics and assembly. One-stop shopping results in savings and better turnaround time.








 Paint Shop


Composite parts can be painted in any colour, including metallic, textured and soft-touch paint. Painting composite parts requires a great deal of specific knowledge and well-trained craftsmen