Park chairs constantly face mildew threats due to outdoor exposure to moisture and humidity. The most effective prevention method combines regular maintenance with protective treatments. Begin by selecting mildew-resistant materials such as powder-coated aluminum or synthetic resins during initial procurement. For existing chairs, apply specialized waterproof sealants every six months to create a protective barrier against moisture penetration.

Establish a weekly cleaning routine using vinegar solutions or mild detergent to remove organic debris that fosters mildew growth. For severe cases, use oxygen bleach solutions which effectively eliminate spores without damaging surfaces. Ensure proper drainage by checking that water doesn't accumulate on chair surfaces.

Consider environmental modifications like strategic placement under protective coverings or installing breathable furniture covers during wet seasons. Implementing these comprehensive measures significantly reduces mildew formation, extending furniture lifespan while maintaining aesthetic appeal for public spaces.