Waterproof 4mm Black PP Sign Board

This pack contains two black corrugated plastic sheets measuring 30 x 30 cm (11.8 x 11.8 inches) and 4 mm thick. Constructed from polypropylene (PP), the material is inherently waterproof, non-porous, and chemically resistant — ideal for environments where moisture, cleaning agents, or temperature fluctuations are present. Each sheet features a uniform matte-black finish on both sides, with no grain direction or surface inconsistencies affecting print or paint adhesion. The panels are engineered for hands-on customisation: they cut cleanly with minimal fraying, accept inkjet and laser prints without bleeding, hold fine-line drawings with precision, and allow full-surface spray painting with even coverage and quick drying. Mounting options include water-based glues, pressure-sensitive tapes, or simple pinning — all without damaging the substrate or requiring power tools. Frequently used for time-limited promotions (e.g., seasonal sale signs), informal announcements (garage sales, lost pet posters), creative learning tools (student project boards, science fair displays), and adaptable interior solutions (temporary office partitions, photo booth backdrops, festival stall branding).