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If your leaving your mark on the streets, you should be using this ink!

Hard To Buff Ink is a world famous graffiti grade ink made by On The Run. The OTR 970 refill features 210ml of highly pigmented, ultra permanent alcohol based black ink. This superior ink is extremely UV resistant and is resistant to both scratching and heat. This legendary ink is a nightmare for cleaning crews! The OTR.970 is designed to refill the Hard To Buff marker series, but will also work perfectly in your favorite alcohol-based ink markers, Pump action valve markers, brushes, air brushes, or any mop or squeeze marker. 

Indoor/Outdoor use, works on paper, glass, plastic, metal, and stone. Can be used on canvas, walls, mixed media, and many other smooth and dust free surfaces. 

Be careful when refilling or using this ink, its the real deal! - Hard To Buff Ink can ruin your clothes and counter tops quickly!!!