Keep your engine running smoother for longer with this eco-friendly flush. It removes salt, calcium, and sediment from your cooling system in just 30 seconds, helping to prevent corrosion and blockages. Safe on gaskets and rubber components, it's a simple way to protect your outboard or PWC engine after every use. Features: Removes salt and calcium build-up in 30s Descales engine cooling systems Adds a corrosion barrier Safe on rubbers and gaskets Plant-based, biodegradable, and hazard-free pH neutral and phosphate free Australian made How to Use: Step 1: Fill the Salt Shift Flusher Canister with 50-100ml (1.7 to 3.4 fl oz.) of Salt Shift Engine Flush. Step 2: Plug the flusher canister into your garden hose, and then into your cooling system flush connection. Step 3: Turn the flush canister dial to setting 3/the larger circle being 3. Step 4: Flush your engine as per your manufactures owners manual.