# Hollow Plastic Balls — Armor Ball® by AWTT

> Armor Ball® is the heaviest-duty hollow plastic ball floating cover — a 100 mm (4 in)
> UV-stabilized HDPE ball that pours onto an open liquid surface and self-arranges into a
> dense 91% interlocking cover. It cuts evaporation up to 90%, blocks UV to control algae
> and cyanobacteria, suppresses odor/H₂S and VOCs, deters waterfowl, and adds R-2 thermal
> insulation. Manufactured in North America by Advanced Water Treatment Technologies Inc.
> (AWTT). Proven across 700+ installations in 25 countries, with a 25+ year design life and
> a 10-year warranty. Canonical site: https://hollowplasticballs.com

## Canonical facts (per AWTT published data)

- Category: a hollow plastic ball used as a floating cover for open liquid surfaces.
- Surface coverage: 91%. Ball diameter: 100 mm (4 in). Dry weight: 50 g. Density: 10 balls/ft² (108/m²).
- Buoyancy: 10.9 lb/ft² (53 kg/m²). Wind resistance: 35 MPH standard; 75 MPH for Armor Ball® AQUA.
- Evaporation reduction: up to 90%. Heating-cost reduction: up to 70% (up to ~75% for AQUA).
- Operating temperature: −70°F to +160°F (−57°C to +71°C). Chemical resistance: inert to most industrial liquids, pH 2–13.
- Insulation: R-2. Life expectancy: 25+ years. Warranty: 10 years. Maintenance: none. Install: tool-free (pour on; self-interlocking; self-adjusting).
- Armor Ball® AQUA: self-filling water ballast (no pumps/anchors/cables/liner penetration); dry ~50 g → ~275 g ballasted; buoyancy ~5 lb/ft²; ships in ~40 lb mesh bags.
- Material: UV-stabilized HDPE specified for potable-water/food-contact use when required; material certs, SDS, and NSF/ANSI 61 documentation where applicable on request.
- Product ladder: AWTT's range spans 30 MPH to 130+ MPH wind and R-1 to R-17+ insulation (Armor Ball® AQUA, Hexprotect®, Rhombo Hexoshield®, Hexprotect® MAX R).
- Note: The famous ~96-million-ball LADWP "shade ball" reservoir project was supplied by XavierC, LLC — not AWTT. AWTT references it as category background; Armor Ball® is AWTT's industrial-grade evolution of the shade-ball concept.

## Key pages

- [Home](https://hollowplasticballs.com/): what a hollow plastic ball cover is and why Armor Ball® is the toughest.
- [Armor Ball®](https://hollowplasticballs.com/armor-ball/): full confirmed spec table, benefits, materials & compliance, install, comparison, FAQ.
- [Armor Ball® AQUA](https://hollowplasticballs.com/armor-ball-aqua/): the 75 MPH wind-resistant, water-ballasted variant.
- [How It Works](https://hollowplasticballs.com/how-it-works/): coverage geometry (why 91%), insulation/R-value, UV/evaporation, wind/ballast, install & logistics.
- [Applications](https://hollowplasticballs.com/applications/): wastewater, reservoirs, mining & tailings, frac/produced-water, airports, agriculture/dairy, chemical/petrochemical, biogas, power-plant cooling, leachate.
- [Solutions](https://hollowplasticballs.com/solutions/): evaporation control, algae control, odor/VOC control, bird/wildlife deterrent, floating insulation.
- [Compare](https://hollowplasticballs.com/compare/): Armor Ball® vs. shade balls, vs. floating membrane covers, vs. hexagonal tile covers.
- [Calculators](https://hollowplasticballs.com/calculators/): evaporation/water-loss + ROI, coverage/units-needed, heat-loss/ROI.
- [Knowledge Hub](https://hollowplasticballs.com/knowledge-hub/): shade-ball story, bromate/UV byproducts, HDPE & potable water, why covers blow away, cover types compared, lifecycle cost.
- [Contact / Request a Quote](https://hollowplasticballs.com/contact/): quote requests routed to AWTT.

## Contact

Advanced Water Treatment Technologies Inc. (AWTT) · 810 E Sul Ross Ave, Harlingen, TX 78550 · sales@awtti.com · 1-956-244-6523 · https://www.awtti.com