Repair gelcoat with little effort


What boat owners know well enough, is often the case with gelcoat sealed other utensils from home and ridges of the case. Dirt, flaky areas or slight cracking mean every spring to repair the gel coat. Not always a complex repair is necessary.

Repair or repair

Minor damage to the gelcoat is exfoliation and slight cracks. For cracks or holes that extend down to the glass fiber reinforced substrate, the gelcoat must be repaired. Easier damage, which also includes weathering, moss and heavy pollution, can be worked up or refreshed.

Renewing gelcoat is only necessary if the surface has become porous over a large area and at least requires uniform removal. In the majority of cases, there is a mistake in processing the gelcoat in the past.

Dust and grease

The damage analysis should first examine the nature of damaged areas. Roughened and peeling uneven surfaces can be repaired by either light sanding or intensive re-polishing.

When mending the focus is the complete removal of dirt, dust and grease residues in the center. Therefore, in the case of exfoliation, the damage picture is to be assessed individually and in case of doubt the repair is a comprehensive repair, including the cutting up of the points to be worked on. If sanding has become necessary repainting and polishing the surface is unavoidable.

Drying and temperature

The freshly repaired areas where gelcoat and hardener were applied should be covered with special film for drying. It must be fixed at the edges outside the machined surfaces with adhesive tape. If air bubbles occur during the drying process, they can be spread.

Each time Gelcoat is used, a stable temperature in the work space or area as well as the work materials and tools is important. The ideal temperature for processing gelcoat, hardener and additives is twenty degrees Celsius. An air humidity of over seventy percent should be avoided as well as a constant air movement, for example by drafts.

Tips & Tricks

If you have deviations from the ideal temperature, humidity or drafts, as may be the case when repairing outdoors, pay attention to the changing drying and curing times.


Video Board: How To Restore Shine To Fiberglass Boat Gelcoat | BoatUS