Compostable coldseal cohesive

A structure comprising a water-based coldseal cohesive composition on a substrate;

• wherein the water-based coldseal composition comprises;
• (a) between 30 and 90 wt % of natural rubber latex;
• (b) between 1 and 30 wt % of a biodegradable resinous material, wherein the wt % refers to the solids content of the biodegradable resinous material;
• wherein the biodegradable resinous material is a protein selected from the group consisting of casein, albumin, whey protein, soy protein, soy protein isolate, and combinations thereof, and wherein when the biodegradable resinous material is albumin, it is present in a solids content of at least 4 wt % relative to the total weight of the water-based coldseal cohesive composition;
• and
• (c) between 30 and 90 wt % water;
• wherein the substrate is selected from the group consisting of cellulose, polybutylene adipate terephthalate, polylactic acid, and combinations thereof;
• wherein the coldseal cohesive composition is applied directly to the substrate;
• and
• wherein the composition comprises less than 10 wt % of non-compostable material, wherein the non-compostable material is selected from the group consisting of acrylics, styrene acrylics, shellac-modified polystyrene, ethylene vinyl acetate, styrene butadiene, vinyl acetate, including emulsions thereof, and combinations thereof.