Powerful Composite Deck Cleaner for Deep-Set Mold, Mildew & Black Stains Are stubborn black stains, mold, mildew, and algae ruining the look of your composite deck? Have you tried countless composite deck cleaners without success? The problem is most cleaners only treat the surface, while composite decking is porous—allowing stains to embed deep within the grooves and pores where typical products can't reach. Our Spray and Clean Composite Deck Cleaner is specially formulated to penetrate deep into composite decking materials like Trex®, TimberTech®, Fiberon®, Azek®, and Cali Bamboo®. Unlike other deck cleaners, our unique formula uses advanced surfactants combined with a safe 5% chlorine bleach solution to target and remove mold, mildew, black spots, and algae deep beneath the surface—without harsh scrubbing or damage to your deck. Many composite deck cleaners only provide superficial cleaning that fails to prevent stains from returning. Spray and Clean goes beyond, breaking down years of buildup for a true deep clean that restores your deck's natural color and beauty. It's perfect for composite decking maintenance, heavy-duty mold removal, and routine seasonal cleanups. How to Use: Mix according to stain severity: use full strength for extremely heavy mold and black spots, or dilute with water from 4:1 for routine cleaning to 1:1 or 2:1 for moderate stains. Apply with a garden pump sprayer or hand sprayer to saturate the deck. Let it soak for 10 minutes up to 2 hours (or overnight for tough stains), then rinse thoroughly with a hose or light pressure washer. For stubborn spots, gentle scrubbing with a bristle broom helps. Why Choose Spray and Clean Composite Deck Cleaner? Deep penetrative action targets mold, mildew, algae & black stains deep in composite decking pores Safe for use on Trex, TimberTech, Fiberon, Azek, Cali Bamboo & most composite decking brands Removes stains without discoloring or damaging the deck surface Easy-to-use spray formula requires minimal scrubbing or power washing Also effective on vinyl railings, lattice, concrete patios, and other outdoor surfaces Trusted by homeowners who want professional results without harsh chemicals or heavy labor For detailed usage tips and a full cleaning guide, visit our website.