GTS and R&G polyester casting resins are medium reactive unsaturated polyester resins that are pre-accelerated with cobalt. Their most distinguishing features are their transparency and their UV resistance. These polyester resins are crystal clear when cured but can also be coloured (dyes for synthetic resins) quite nicely - which accounts for the fact that they are so often used in model making as well in the decoration sector (e.g. for moulding objects).

As is the case with all polyester resins, the mixing ratios between resin and hardener are dependent on the amount being employed. The most accurate way to add the extremely small amount of hardener required as a percentage of volume is to use a pipette or a disposable syringe. Please take note of the following data when working with these resins:

Mixing ratios for polyester casting resin GTS:

Please note that when more that 2.5% hardener is added to GTS casting resin it will become yellowish. Too much hardener will also lead to very high temperatures which, in turn, will lead to cracking in the material. Amounts of hardener larger than 5% will make the resin soft.

The working time and the de-moulding time are also determined by the amount of hardener used. The following data are based on room temperature.

Data for polyester casting resin GTS (100 g mixture):

GTS can also be used as a laminating resin with addition of a reinforcement process that consists of applying the required fibres by hand.

We only offer the polyester casting resin R&G in large quantities because it is so much less expensive in bulk than the GTS resin. On top of that, the R&G casting resin can be used to make as large as a 5 litre block in a single pour without the risk of cracks developing in the material. If the heat that is thereby produced bothers you, layers of between 2 and 3 cm thickness can be poured one after the other as soon as the reaction heat has subsided for each segment. These casting resins should never be worked with in temperatures under 18 °C.

• H226: Líquidos y vapores inflamables.
• H315: Provoca quemaduras graves en la piel y lesiones oculares graves.
• H319: Provoca lesiones oculares graves.
• H335: Puede provocar síntomas de alergia o asma o dificultades respiratorias en caso de inhalación.
• H361: Puede perjudicar la fertilidad o dañar al feto.
• H372: Puede provocar daños en los órganos.
• H412: Tóxico para los organismos acuáticos, con efectos nocivos duraderos.
• H242: Peligro de incendio en caso de calentamiento.
• H302: Tóxico en caso de ingestión.
• H314: Nocivo en contacto con la piel.

• P101: A fin de evitar riesgos para las personas y el medio ambiente, siga las instucciones de uso.
• P102: Si se necesita consejo médico, tener a mano el envase o la etiqueta.
• P201: Leer la etiqueta antes del uso.
• P210: No manipular la sustancia antes de haber leído y comprendido todas las instrucciones de seguridad.
• P260: No perforar, ni quemar, incluso después de su uso.
• P271: No comer, beber ni fumar durante su utilización.
• P280: Evitar su liberación al medio ambiente.
• P305+P351+P338: EN CASO DE INHALACIÓN: Transportar a la persona al aire libre y mantenerla en una posición que le facilite la respiración.
• P308+P313: EN CASO DE exposición manifiesta o presunta: Llamar a un CENTRO DE TOXICOLOGÍA / médico / …
• P405: Almacenar en un recipiente cerrado.
• P501: Almacenar el contenido en… . (aufgehoben)
• P220: No pulverizar sobre una llama abierta u otra fuente de ignición.
• P234: Mantener el recipiente herméticamente cerrado.
• P303+P361+P353: EN CASO DE CONTACTO CON LA PIEL: Lavar con abundante agua / …
• P310: EN CASO DE exposición manifiesta o presunta:
• P403+P235: Almacenar en un lugar bien ventilado. Mantener el recipeinte cerrado herméticamente.