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Exterior plywood is a type of engineered wood panel specifically designed to withstand moisture, humidity, and weather exposure better than standard interior plywood. It's constructed to perform reliably in outdoor environments or damp indoor spaces.

Product: 4mm Exterior Grade Plywood
Core: 100% Hardwood / Mixed Hardwood (Poplar, Eucalyptus, Birch combi)
Face/Back: Rotary Cut Hardwood Veneer
Glue: WBP (Water Boil Proof) Phenolic Resin
Certifications: CARB Phase 2 Compliant, EN 314-2 Class 3, FSC® Certified (Optional - Specify if available), CE Marking (Upon request for EU)
Formaldehyde Emission: E0/E1 Standard

Products Description

Waterproof Glue:

Uses WBP (Water Boil Proof) glue, typically phenolic resin.

This glue bond remains strong and intact even when subjected to prolonged moisture, humidity, wetting, and drying cycles. It won't delaminate (separate) like interior plywood glue would.

Interior plywood uses urea-formaldehyde (UF) glue, which breaks down when wet.

Weather-Resistant Veneers:

Often uses wood species naturally more resistant to decay or treated to enhance durability.

Common face/back veneers include Douglas Fir, Larch, Cedar, Meranti, or specific tropical hardwoods. The core layers can be hardwood or softwood.

Construction:

Made by cross-laminating (layers with grain running perpendicular) multiple thin wood veneers.

Bonded under high heat and pressure with the waterproof adhesive.

Key Characteristics

Moisture Resistance

Handles rain, snow, humidity, and ground contact much better than interior plywood. Won't delaminate from moisture alone.

Dimensional Stability

Resists warping, twisting, and swelling better than interior plywood when exposed to moisture changes.

Durability

More resistant to fungal decay and rot compared to untreated interior plywood (though not rot-proof like pressure-treated lumber).

Strength

Maintains structural integrity in damp conditions where interior plywood would fail.

Manufacturing Process

Selective Veneering: Only high-quality, defect-free rotary-cut hardwood veneers are selected for the face, back, and core layers.

Precision Layering: Veneers are cross-laminated (grains perpendicular) for exceptional dimensional stability and resistance to warping.

Advanced Bonding: Coated with premium WBP Phenolic Resin adhesive, renowned for its superior waterproof and weatherproof properties. This glue line remains stable under prolonged moisture exposure.

High-Pressure Hot Pressing: Layers are bonded under controlled high temperature and intense hydraulic pressure, ensuring deep glue penetration and a void-free, solid core structure.

Precision Sanding: Both faces undergo uniform fine sanding (e.g., 120-180 grit) for a smooth, ready-to-finish surface, ideal for painting, laminating, or veneering.

Strict Grading & Inspection: Every panel undergoes rigorous quality checks for glue bond strength (tested to relevant standards like EN 314), thickness tolerance, surface defects, and overall integrity before packing.

plywood process

Products Images

Why Choose US

Consistent Quality: Rigorous QC ensures every shipment meets international standards and your specifications.

Competitive Pricing: Direct factory sourcing provides excellent value for high-performance plywood.

Global Compliance: Meets or exceeds key international standards (CARB, EN norms, potential CE).

Export-Ready Packaging: Bundled securely with edge protectors, strapped, and wrapped in weather-resistant poly sheeting or packed in fumigated wooden crates (ISPM 15 compliant) for safe ocean freight.

Reliable Supply: Efficient production and logistics ensure on-time delivery worldwide.

Technical Support: Dedicated export team provides product specifications, documentation, and support.

How To Cooperate With Us?

For any inquiries, product consultations, or after-sales support you may need, we are here to assist you!

You can reach us through the following channels:

Tongcheng Plaza, Jianshe Road, Pizhou, Jiangsu, China

+86-15190733969

sales@ulink-wood.com