Hello everyone,

I would like to cast the backplate of a tail light.  silicone 2 piece mould is already made and I am looking for the right casting resin.

As this part is needed to mount on the car (screws), it must be strong / flexibility is not important.  Needs to be UV resistant for years.  on some places, part is only 2MM thick.

I was thinking to use the Xencast P6 resin, eventualy combined with carbon fibre powder (as the part must be black anyway).

Is this the best solution or are there other solutions / suggestions?

P6 with milled carbon fibre would certainly give a strong combination. You just need to be careful to mix it thoroughly and ensure there is no moisture in the moulds and its not too humid when you pour it as P6 is quite moisture sensitive. 

The milled carbon will give you a nice charcoal black.  You could add further black pigment to darken the shade if needs be.

Don't forget it might be a wise idea to postcure the resin if possible as with some filament bulbs used for a long period, the ambient temperature in the light housing can get quite high.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

thanks for your reply Warren, will post cure the resin.  

inside of the tail lights is paintend silver for reflection.  perhaps there is a coating in the easy comp range that reflects (light and heat)?

We don't have any silvered coatings like that.  I believe on most original parts it is a plastic chroming process.  It might be worth looking in the vehicle restoration trade to see if there is a paint based product for DIY application.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Thanks for the advice, i will make an order today