Additives

Additives for epoxy resin: Additives are supplementary substances added to the still-liquid epoxy resin mixture. Depending on the intended use, they change the properties of the resin, for easier sanding, better fillability, or protection against fouling.

Benefits and material properties

Talc: makes the resin fillable and easier to sand once cured

Thixotropic agent: makes the resin stay in place so it does not run on vertical surfaces

Cotton: reinforces and thickens the resin, suitable for bonding and heavy-duty repairs

Copper powder: provides a natural biocidal effect on underwater hulls. The copper remains permanently bound in the synthetic resin and is not released into the water.