Clean gelcoat properly


While surfaces on boats and mobile homes sealed with gelcoat often have to be freed from signs of use such as plankton, insect remains or other buildup, the cleaning effort for gelcoat on garden and patio furniture is generally manageable. If heavier soils are caused by tree resin, for example, there are effective cleaning methods.

Physical and chemical dirt

For the gel coat, cleaning depends heavily on the condition and care of the surface. The more thoroughly the original application and polishing of the gelcoat was done, the easier it is to cleanse. Decisive factor is the smooth surface condition, which does not allow physical dirt attachments.

If this circumstance is given, only cleaning dirt must be removed when cleaning, which chemically "holds" the surface. Since gelcoat is resistant to acid, dilute acids are an effective cleaning agent. Alkaline agents, unlike polishing, should not be used for cleaning as they will dissolve the gelcoat.

Dilution with citric or hydrochloric acid

If thicker and mostly sticky dirt is to be removed, dilute citric as well as dilute hydrochloric acid are suitable. The ecologically safer dilution with citric acid is fifty percent mixed with water, hydrochloric acid twenty to eighty percent.

Among boat and yacht owners, acetone, nitro thinner, chlorine cleanser, bleach and alcohol are popular detergents. When using these substances for cleaning should be used very carefully and only after detailed consultation of a specialist company.

After polishing possibly polishing

For most of the usual soiling on the property and in the garden, the salt and citric acid dilutions are sufficient. In addition, polishing or light grinding can make cleaning significantly easier. In the case of a surface protection consisting of hard wax, the condition of the wax layer decides.

After spraying and rubbing or brushing the gel coat with the acid dilutions, the cleanliness of the surface should already have the desired state. If this is not the case, mechanical processing must be performed by polishing.

With polishing paste and / or natural abrasives, the scratched surfaces are smoothed. The "leveling" of the micro-grooves leads to a reduction of the surface and removes any physical dirt accumulation the basis.

Tips & Tricks

If you have used gelcoat for garden furniture or other household items made of fiber-reinforced plastics as a protective cover, but are not satisfied with the degree of cleanliness after cleaning, you may consider acrylic paint as an alternative.


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