HG Scale Away cleaning concentrate is a powerful product to remove lime scale; rust stains; urine deposits and copper oxide. Safe and specially formulated to recondition all materials in bathrooms and kitchens such as toilets; chrome faucets; stainless steel; ceramics; tiles; glaze; glass; crystal; and plastic. Directions for use: Use rubber gloves and eye protection (glasses or goggles). Test HG scale away concentrate with a sponge on a small and inconspicuous place first. Apply with a scrubbing sponge. Leave to work for a few minutes to dissolve lime and scale; then clean with sponge and rinse off thoroughly with water. Use the scouring side of a sponge to remove stubborn scale; but not on chrome or gold-plated surfaces. Use undiluted or up to 1 :10 (with water). For bathtubs always dilute with 10 parts of water (1 :10). Shower heads (nozzles): If functioning badly due to scale build-up; immerse in a bowl of undiluted HG scale away concentrate for 30 minutes then scrub and rinse with water."