Spider cracks are small cracks in the gelcoat. These hairline cracks often occur naturally due to the aging of the paint system. By repairing gelcoat spider cracks with IJmopox ZF Primer, the treated surface looks great again.
Supplies
Before repairing hairline cracks in the gelcoat, it is important to clean the gelcoat. For this, use a high-pressure cleaner or Riwax RS Boat Clean. By cleaning the surface properly, you will clean the cracks well and spray away loose pieces of gelcoat easily.
Sand the entire surface with 180-grit sandpaper. By sanding the surface, you improve the adhesion between the gelcoat and the ZF Primer that you will apply. After sanding, degrease the surface with Double Coat degreaser.
During sanding, spots may have appeared where the gelcoat has come loose. Touch up these areas with Variopox Epoxy Filler and then sand again.
We are going to repair the gelcoat crackle with IJmopox ZF Primer. Before using ZF Primer, read the technical data sheet carefully. It contains important information about mixing ratio, amount of thinner, consumption and application.
Instructions for use of ZF Primer
We recommend applying 2 coats of this epoxy primer. 1 layer without thinner and then 1 layer with thinner. When working with ZF Primer, always wear covering clothing and nitrile gloves.
When you have applied ZF Primer, the tiny cracks that cause gelcoat spider cracks will have been filled. We recommend sanding the surface again with very fine 200 grit sandpaper (dry). After this, you can continue with step 4 of the painting instructions for your deck or hull.
Do you have any questions about a gelcoat repair or about repairing crackle? Feel free to contact one of our specialists. We will be happy to advise you to make your project a success. Send us a WhatsApp message or email to support@polyestershoppen.com for free, no-obligation advice.
Crazing refers to fine hairline cracks in the gelcoat, typically caused by ageing, UV exposure, and stress in the material. It is common on older boats or surfaces exposed to sunlight for extended periods.
Start by cleaning and sanding the surface, then apply IJmopox ZF Primer. Use epoxy filler for any loose areas. The primer effectively fills the fine cracks.
Yes, with the right products and our step-by-step guide, you can repair crazing yourself. Contact our specialists for advice if you’re unsure.
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