Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Xtreme Reach Hose End Refill, 48 Fluid OuncesBrand: Wet & Forget Features: Wet & Forget Xtreme Reach Hose End Refill Outdoor Cleaner using original nozzle attaches to garden hose; jet tip sprays up to 30ft to remove green and black stains caused by moss, mold, mildew, and algae on roofs and 2nd story siding; fan tip provides quick application to large surfaces driveways, patios and decks; no scrubbing, no rinsing, and no pressure washing, just wet it and forget it Spray dry surface on a cool day