Patio-Tile Cleaner | Hag116z Immediate results Suitable for gravel tiles Size: 1L HG Patio Cleaner Or Brick Cleaner 1 Litre | Hag116z HG patio-tile cleaner is a strong, concentrated patio cleaner developed especially for effectively cleaning terrace tiles. Our patio cleaner cleans dirty, dull gravel and concrete tiles. After a treatment with HG patio-tile cleaner terrace tiles will look like new again!