A method of making a polymeric woven bag in filled and closed state, comprising: applying a heat activated first adhesive layer on a portion of a first panel of the bag to be pinched closed between the first panel and a second panel of the bag after filling the bag with contents; applying a heat activated second adhesive layer on a portion of the second panel, wherein the said layers are activatable at a temperature below the softening point temperature of the polymeric material, wherein a chemical family of the adhesive layers is selected from chemical families comprising, (a) polyolefin thermoplastic components, (b) aqueous dispersions of adhesive material or water based adhesive materials applied in liquid form and air dried or cured to a stable, non-adhesive state when air dried to ambient temperature, (c) an acrylic based waterborne adhesive, (d) a polyurethane dispersion adhesive, (e) a vinyl polymer or co-polymer emulsion, (f) a butyl, synthetic or natural rubber adhesive, (g) a water based emulsion of triethylamine adhesive, drying the first adhesive layer and the second adhesive layer; flattening the bag for shipment and handling, activating the first adhesive layer and the second adhesive layer after filling the bag with contents by applying heat at a temperature below the softening point temperature of the polymeric material without heating the adhesive layers (600, 602) to their melt flow state temperatures; and pinch closing the end of the bag to urge the adhesive layers into contact and to form an adhesive-to-adhesive seal. applying a heat activated first adhesive layer on a portion of a first panel of the bag to be pinched closed between the first panel and a second panel of the bag after filling the bag with contents; applying a heat activated second adhesive layer on a portion of the second panel, wherein the said layers are activatable at a temperature below the softening point temperature of the polymeric material, wherein a chemical family of the adhesive layers is selected from chemical families comprising, (a) polyolefin thermoplastic components, (b) aqueous dispersions of adhesive material or water based adhesive materials applied in liquid form and air dried or cured to a stable, non-adhesive state when air dried to ambient temperature, (c) an acrylic based waterborne adhesive, (d) a polyurethane dispersion adhesive, (e) a vinyl polymer or co-polymer emulsion, (f) a butyl, synthetic or natural rubber adhesive, (g) a water based emulsion of triethylamine adhesive, (a) polyolefin thermoplastic components, (b) aqueous dispersions of adhesive material or water based adhesive materials applied in liquid form and air dried or cured to a stable, non-adhesive state when air dried to ambient temperature, (c) an acrylic based waterborne adhesive, (d) a polyurethane dispersion adhesive, (e) a vinyl polymer or co-polymer emulsion, (f) a butyl, synthetic or natural rubber adhesive, (g) a water based emulsion of triethylamine adhesive, drying the first adhesive layer and the second adhesive layer; flattening the bag for shipment and handling, activating the first adhesive layer and the second adhesive layer after filling the bag with contents by applying heat at a temperature below the softening point temperature of the polymeric material without heating the adhesive layers (600, 602) to their melt flow state temperatures; and pinch closing the end of the bag to urge the adhesive layers into contact and to form an adhesive-to-adhesive seal.