Hi. We've begun to use your AS40 Addition Cure Silicone Rubber and when cured it is ideal for our application. However, we are having some difficulty in mixing it thoroughly as the silicone is opaque and the catalyst is transparent so it is nearly impossible to know when its thoroughly mixed. My question is, can a die be added to the catalyst? The silicone we used previously from another supplier was pure white and the catalyst dark blue therefore when the mix became a consistent light blue colour with no white or blue streaks then we would know precisely when it is was fully mixed.

Although it can be hard to mix, it should be possible without needing to pigment.  However, should you wish to pigment, you can use any of our Pigments for RTV Silicone Rubber



Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I'll give the pigment a go. Many thanks.