Fillers are materials used for special functions or to reduce cost of composite parts. You can choose suitable fillers for your application from the list below.


Fillers are materials used for special functions or to reduce cost of composite parts. You can choose suitable fillers for your application from the list below.

Wacker HDK N20

Thixotropy Additives

Fumed silica functions as a thixotropic additive and increases viscosity of resins and gelcoats while preventing sagging on vertical surfaces when added to resin systems.

AL-100 / AL-200 / AL-300

Heat & Electricity Conductive Fillers

Polyester resins have very low heat and electrical conductivity values. It is possible to incorporate aluminum powders inside their matrix to allow for heat and electricity conductivity. This filler can be used in molds for acrylic sheets, solar panels or satellite receivers. It is possible to obtain a metal like appearance from castings with aluminum powder. AL-100, AL- 200 and AL-300 each have different particle sizes.

Coathylene HA 1682

Fillers for SMC-BMC

Coathylene HA 1682 is used for dimentional stability, to control volumetric shrinkage, for better surface appearance and to improve the mechanical properties of SMC and BMC formulations.

Zinc Stearate

Fillers for SMC-BMC

Zinc Stearate is an internal release agent which promotes demolding of parts. 


Fillers for SMC-BMC

Luvatol is a MgO paste which is a thickener for SMC formulations.


LP / LSA Thermoplastics Additives

LSA is a polystrene solutions for hot press applications. It provides low shrinkage and floating. LSB and LSC are polyvinyl acetate solutions. They are low profile (LP) additives that provides better surface quality and low shrinkage. It is possible to obtain Class A surface quality in SMC formulations which contain LP additives LSB and LSC.

Calcite and Dolamite

Economical Fillers

Calcite and dolamite are fillers used to lower the cost of composite parts by replacing or decreasing the volume of resin in the structure, also enabling to have more rigid parts. These fillers can decrease elongation values. Primary application areas are artificial marble and composite wall panels.

Economical Fillers Talk Extra Extra

Economical Fillers

Talk Extra Extra minerals help with ease of sanding, because of this, it is the preferred choice for car body repair putties and other sandable product formulations.

Expancel 551

Weight Reducing Fillers

Expancel 551 is a small sized hollow plastic filler particle which decreases the density of the formulation. It is possible to use Expancel 551 in easily sandable formulations and where weight reduction is critical.

Glass Microspheres

Weight Reducing Fillers

Microspheres are hollow glass spheres which decrease the density of formulations and can be used in putty formulations because of their small particle sizes, around 70μ.


Improve Abrasion Resistance

This filler is a crystal form of aluminium oxide (Al₂O₃), which is one of the hardest minerals in nature with a mohs value of over 9. It is possible to incorporate this filler into resin or sprinkle it on the surface of wet resin.

Apyral 16 / Alolt 2AF

Flame Retardant Fillers

Aluminium hydroxide (Al(OH)³) filler is the most common filler for flame retardant applications. Flame retardancy increases as the ratio of ATH increases in the formulation. Apyral 16 and Alolt 2AF have the optimum particle size distribution enabling higher loadings to the formulation with a reasonable cost value.

Chemours Ti-Pure R-902+

White Pigments

Chemours Ti-Pure R-902+ is a white pigment powder suitable for interior or exterior formulations. R-902+ has an excellent balance of performance in both in water based and solvent based formulations such as high chalking resistance, high gloss and bright coloring.

Carbon Black

Black Pigments

Carbon black pigment with color index number P.Bl.7 is for general industrial use. Pure black color gives a deep black effect.

Modification Description

  • FR   Filled flame retardant
  • D*   Filled (*with filler content)
  • T Thixotropic (no sagging)
  • A Cobalt preaccelerated
  • ABP Amine preaccelerated
  • UV UV Curing
  • L   UV light stabilized
  •   I Lower viscosity
  •   V Higher viscosity
  •   LSE   LSE (low styrene emission)
  •   H* Gel time customized (at room temperature) * minutes
  • H40 Optimized for summer season. Gel time (at room temperature) 40 minutes.
  • H20 Optimized for winter season. Gel time (at room temperature) 20 minutes.
  •   COLOR   White or custom color options

Gelcoat Customizations
Polijel gelcoat table descriptions and modifications.

  • Spray Application (airless preferred)
  • Brush or Roller Application
  • Color Option: White colored
  • Color Option: Light colored (pastel)
  • Color Option: PRO colored

Production Quantity Depending on Process (parts/year)
Regardless of product dimension and complexity..

    Contact Us

    * By sending this form I agree to be contacted based on my message and that I may be contacted in the future in accordance with IAI’s privacy policy.