TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The moisture scavenger comprises powders of at least one compound comprising calcium oxide, magnesium oxide (both preferred), lithium oxide, strontium oxide, barium oxide or aluminosilicates.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The sealant composition further comprises a second ethylene-octene copolymer having a melt flow index of greater than or equal to 30 g/10 minutes. The sealant composition comprises 0.5-3 wt.% of at least one flame retardant. The composition comprises: 5-20, preferably 8-10 wt.% of the maleic anhydride modified polyolefin; 40-60, preferably 50-55 wt.% of the ethylene-octene copolymers; 0.5-5, preferably 1-4 wt.% of the ethylene-vinyl acetate copolymer; 1-30, preferably 1-10 wt.% of the inert filler; 20-40, preferably 25-35 wt.% of the moisture scavenger; and 0.5-5, preferably 1-3 wt.% of the stabilizing or antioxidant preserving agent. Preferred Components: The weights of the ethylene-octene copolymer, maleic anhydride modified polyolefin, ethylene-vinyl acetate copolymer, inert filler, moisture scavenger and preserving agent sum up to at least 95% of the total weight of the composition. The maleic anhydride modified polyolefin is a polyethylene/polypropylene copolymer modified with maleic anhydride having a melt flow index of higher than 1 g/10 minutes and a density of 0.87-0.96 g/cc. The ethylene-octene copolymer has a melt flow index of greater than or equal to 5 g/10 minutes. The ethylene-vinyl acetate copolymer has a vinyl acetate content of higher than 30 wt.% and a melt flow index of higher than 30 g/10 minutes. The inert filler comprises a mixture of talc and carbon black in weight proportion of 6:1-8:1, preferably 2:1-4:1. EXAMPLE - Mixture of 100:19:6:3 proportions by weight of DOW Engage 8411 (RTM: Polyethylene (1-octene)), DOW Amplify TY 1351 (RTM: Polyolefin modified with maleic anhydride), Arkema Evatane 33-45 (RTM: Random copolymer of ethylene-vinyl acetate produced through radical high-pressure polymerization) and ethylene glycol bis-(3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate) type preserving agent, respectively, was heated to 220 degrees C in a thermostated chamber containing two counter-rotating tools set to a constant rotational speed (twin-screw system) and kept in rotation for 3 minutes. Then, a mixture of talc and carbon black in 10:1 ratio and a mixture of calcium oxide and magnesium oxide in a 2:1 ratio, respectively for amounts of 6% and 28% compared to the total weight of the thus obtained composition, were added. The mixture was then maintained in rotation at constant speed and a flame retardant in an amount corresponding to 2 wt.% with respect to the composition was then added. The temperature was increased up to 245 degrees C. The composition was cooled and subjected to characterization by differential scanning calorimetric analysis to assess the range of the temperatures of phase transition, identified at 26-137 degrees C as a result of the crystalline phase melting.