Teroson UP620 White Gelcoat Filler - Can it be pigmented ?
Following up on our previous blog post about the Teroson UP620 white gelcoat filler, we are frequently asked if this product can be pigmented?
The short answer is yes; but it's worth noting that, as indicated by its name, the UP620 is a 'white' gelcoat filler. Adding additional pigment will result in a lighter shade than the pigment itself. While adding more pigment can help achieve a darker shade, it may lead to issues such as reduced overall strength, decreased water resistance, colour bleeding, and general curing issues.
There are certainly applications when adding colour will work a well so it definitely has its uses. Ultimately, it is a matter of trial and error on your part to determine the overall suitability. For the best colour match on gelcoat we would recommend using an unpigmented gelcoat and pigment.
Below, we have provided a few examples of colours added to the gelcoat filler in different percentages.
This photo above is about the best we could manage to show the subtle differences with varying ratios of our Yacht Green pigment at 2%, 5% and 10% to the weight of gelcoat filler. In this photo you'll see the difference in the Dense Black and Golden Yellow pigment samples against the original colour in the pigment jars also.
Close-up of the difference, notice there's not much change in shade between the 2% and 5% addition, as mentioned it is very subtle, the 10% made the biggest difference but generally you would want to avoid using any more as this is likely to cause curing issues and other problems with the gelcoat filler, as mentioned in the previous blog post some trial and error required on your part.
List of products used below:
Teroson UP620 Whtie Polyester Gelcoat Filler
