MATERIAL FEATURES

RAINBODECK is engineered for humid outdoor environments. Its production process encapsulates wood flour in plastic, preventing direct wood-moisture contact.

All RAINBODECK materials incorporate UV-resistant formulas. Slight color change may occur (typically visually imperceptible) when exposed to sunlight, stabilizing to a fully weathered hue within 12-16 weeks.
CoShield™ utilizes advanced protective technology to deliver exceptional fade and stain resistance. Our products come with dual warranty coverage: the HPC series is backed by a 15-year anti-fade warranty, while the CoShield™ series offers an extended 25-year comprehensive warranty covering both fade and stain resistance.

Natural wood contains fibers that lose moisture when exposed to extreme temperatures. When the outer layer's moisture content drops below the saturation point, it shrinks, while the inner layer (still above saturation) remains stable. This imbalance creates stress, causing outer-layer cracks.
RAINBODECK uses 60-mesh wood flour (destroyed fiber structure) that undergoes:
1. Heat treatment to remove moisture
2. Matrix mixing with HDPE under high pressure/temperature
This fully encapsulates wood flour, preventing direct moisture/temperature contact.

The entire production process utilizes matrix heat and pressure to remove moisture from wood flour while simultaneously encapsulating it with HDPE plastic. This material does not promote fungal or mold growth; RAINBODECK achieves a GRADE-0 rating in fungal and mold resistance testing.

Unlike bamboo or other natural materials with high sugar content, RAINBODECK is made from heat-treated wood flour encapsulated in HDPE, which is unappealing to insects and not a preferred food source for them.

RAINBODECK composites are 50-70% heavier than natural timber sections, with a specific gravity of 0.96.
The increased weight results from higher density, which also enhances:
✓ Moisture resistance
✓ Overall durability
For applications requiring lighter materials, we offer hollow-core designs that maintain structural integrity while reducing weight and cost.

RAINBODECK decking products meet the industry-leading anti-slip standards. They comply with:
The German DIN 51097 anti-slip ramp test under wet and barefoot conditions (achieving the highest level, CLASS C).
The German DIN 51130 anti-slip ramp test under oily conditions with work shoes (achieving CLASS R11), which far exceeds the market average of R9-R10.
RAINBODECK decking is suitable for almost all residential, commercial, and public projects, providing customers with reliable safety protection.

HPC is not stain-resistant. Although it performs better than natural wood, spills must be wiped away promptly to prevent absorption by the natural wood fibers.
CoShield™ is a stain-resistant product backed by a 25-year stain resistance warranty. (Learn more about the RBD anti-fading and stain resistance warranty.)

Due to the natural properties of plastic and wood, the expansion and contraction of RAINBODECK must be considered during installation.
Sufficient expansion gaps must be left at butt joints and where the profiles meet fixed objects. Consider the temperature at the time of installation to account for contraction and expansion. The average expansion rate of the profiles is approximately 3 mm per linear meter. (Learn more in the RAINBODECK INSTALLATION MANUAL.)

RAINBODECK decking does not typically get hotter than pressure-treated wood. However, on extremely hot days with intense sunlight, nearly any surface can become uncomfortably warm.
Lighter-colored boards tend to remain slightly cooler than darker composite boards. Extensive studies have shown that the color of the decking board—whether made of wood-plastic composite or natural wood—is the most significant factor affecting heat retention.
In these studies, pressure-treated wood stained the same color as RAINBODECK was actually hotter than RAINBODECK under identical test conditions.

Material Features