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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
Gel Coat Troubleshooting Guide Part 2