Systems and methods for cooling a roll in metal processing

A method of containing a viscous material applied to a surface, comprising:

• moving a system adjacent the surface, the system comprising:
• a housing;
• a viscous material delivery device;
• a plurality of seals movable between a first position and a second position,
• wherein a contacting edge of each seal of the plurality of seals contacts the surface in the first position and is separated from the surface by a gap in the second position, and wherein the surface carries the viscous material toward at least one seal of the plurality of seals;
• delivering the viscous material to the surface;
• and
• delivering gas from a plurality of gas delivery devices toward the contacting edge of each seal of the plurality of seals to move each seal of the plurality of seals into the second position where the contacting edge of each seal of the plurality of seals is separated from at least the one surface by the gap,
• wherein a velocity of the gas is sufficient to prevent the viscous material on the surface from passing through the gap and
• wherein, when each of the plurality of seals is in the second position, the gas supplied by the plurality of gas delivery devices is configured to maintain the viscous material within the housing by acting as a contactless seal between the housing and the surface.