Problem: Color Differential
Have you had an issue with different color or shading of the topcoat on your epoxy floor coating project? We are going to explain what can cause this issue, so you can avoid it in the future, and what can be done to repair it.
Description: Color Differential
A color differential is when there is a difference in color or shading of the topcoat.
What can cause Color Differential when applying epoxy floor coating to concrete floors:
- Re-touching after 15 minutes: Color float issues arise when a pigmented epoxy has been applied and is re-touched or rolled again after setting for 15 minutes or longer. Different shades in color may result.
- Using Different Batch Numbers: Coloring can vary from batch to batch. Different batches used on the same project can result in color variances.
- Improper mix ratios: Adding color in the field without using the same base batch and the same amount of color pigment in each mix can result in color variations.
How to repair color differential:
Backroll the entire area always using an 18”, woven, shed-resistant, 3/8” nap roller. Always try to backroll across the entire area from side-to-side.
When possible, recoats should always be completed with the same coating batch.
If material needs to be re-touched or rolled for any reason, it needs to be done within 10 minutes of application.
If batches are different, blend color into resin side and box all pigments before adding activator.