Materials container with index markings

A container for highly volatile viscous materials adapted to be applied as a bead onto a surface, said container adapted to permit visual monitoring of the contents thereof, comprising:

• an elongated housing having a hollow interior and a tubular sidewall fabricated entirely out of a transparent material, an innermost portion of said sidewall radially facing the interior of the housing completely around said sidewall being composed of a high barrier plastic substance;
• a nozzle member secured at a downstream end of said tubular housing and including an elongated snout having a passageway therethrough in fluid communication with the viscous materials contained in the interior of said tubular housing, said passageway varying in cross-section along its length whereby said snout may be selectively severed to form a downstream outlet for the viscous materials, said outlet thereby having a selectively variable size;
• a piston member enclosing an upstream end of said tubular housing said piston member being slideably received in said interior so that the piston member may be pressed against the viscous materials to force the materials out of said outlet as said piston member is moved downstream through said tubular housing whereby the position of said piston member and the viscous material in said tubular housing may be visually perceived through said sidewall;
• first index markings on said snout for indicating the size of the outlet formed when the snout is severed at a selected first index marking, and
• second index markings on said sidewall, said second index markings correlated to said first index markings whereby, for a selected first index marking, the second index marking and said piston of the piston member cooperate to indicate the linear length of the bead which maybe applied by the viscous material remaining in the housing.