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12
Oct
Our last Troubleshooting Guide in this Series. Hopefully you have found this series helpful.
| PROBLEM | CAUSE | SOLUTIONS OR ITEM TO CHECK FOR |
|---|---|---|
| Cracks- Spider cracks radiating from a central point or in circles. Or, stress cracks that are in parallel lines. | Excessive gel coat thickness, | Use a mil gauge and do not go over 24 mils. |
| Stress due to flexing. | Make sure not to use too much gel coat. Create a laminate that is not too thing. Make sure part is cured. | |
| Fisheyes | Water, oil or silicone contamination | Make sure not to use to much mold release, Drain air lines in spray gun. Check lubricating materials used with the equipment. |
| Gel coat too thin | Use +/- 2 18 mils in 3 passes | |
| Material gelled in container | Age and storage condition | Use within storage limits and store in cool, dark area. |
| Pinholes | Insufficient atomization | To high gel coat delivery rate. Not enough atomizing pressure. |
| Sags and runs | Excessive gel coat | Apply +/-2 18 mils thick, wet. |
| Low viscosity | Not enough styrene. Check viscosity and thixotropic properties. |
Click below for Part 1 and Part 2 and Part 3.
Gel Coat Troubleshooting Guide Part 1
Dallin Leach
