OTR.970 Hard To Buff Ink (210ml)

 New and improved formula!

OTR.970 is ultra permanent alcohol-based superior ink. This legendary ink is the nightmare of cleaning crews. Optimized for the OTR.070 & OTR.071Hard to Buff Marker and the ON THE RUN Soultip™ squeeze markers, OTR.970 works perfectly with a wide variety of painting and writing instruments.

Multi-purpose use! For indoor & outdoor use.  Works on paper, metal, plastic, glass, and stone. Can be used on canvas, walls, mixed media, and many other surfaces. Best on smooth and dust-free surfaces!

Use the OTR.970 HARD TO BUFF INK with alcohol-based ink markers, pump action valve markers, brushes, air brushes, or any mob & squeeze marker etc.


alcohol-based ink
210+ ml
Color: Deep Black

Multi-purpose use! 

• ultra permanent
• fast drying
• highly pigmented & opaque
• strongly smudge- & scratch-
• strongly UV- & heat-resistant
• weatherproof
• xylene-free

Optimized for the OTR.070 & OTR.071 Hard to Buff Markers,  ON THE RUN FLOWPENTM & SOULTIPTM SQUEEZE MARKER

Back in stock at 12/3/2020



  • This stuff is fantastic
    Review by Christoforos / (Posted on 5/29/2019)
    I'm pretty loyal to Molotow Coversall, but this is my new preferred black ink. Still visible under two coats of paint, haha.

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