Mao Zedong Youth Art Sculpture, Orange Isle, Changsha
A city-landmark stone sculpture, fully exposed and almost impossible to clean, now stays clean on sunlight and rain.
The problem
Large outdoor stone sculptures suffer from rain, exhaust and biological growth: surfaces blacken, stain and grow algae. The huge, complex form means cleaning needs work at height — risky and potentially damaging to the stone.
What we did
- Surveyed porosity, weathering and environment; drew up the application plan
- Small-area sample test for adhesion, waterproofing and stain resistance
- Professional stone cleaning to remove dust, algae and old residue
- Applied the penetrating nano primer to seal the pores, then the nano self-cleaning top coat
- Ambient cure, then waterproofing, stain-resistance and self-cleaning tests
Results and value
The sculpture surface is now super-hydrophilic and photocatalytic: rain carries dust away and sunlight keeps breaking down organic grime and mould. The internal barrier stops water ingress, preventing efflorescence and biological attack and preserving the landmark long term.
Other Stone self-cleaning projects
Guangzhou municipal transport GRC elements
Road and bridge GRC elements and carved ornaments that stained and yellowed now shed rain and stay clean.
View project →
Meixihu Culture & Art Center white curved elements, Changsha
Large white curved facades show every stain; after coating, treated and untreated areas differ at a glance.
View project →Stone yellowing, staining and costly upkeep?
Tell us the substrate and area and we will assess a two-layer protection plan.
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