TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: Specifically, sealant composition comprises: (a) an olefinic polymer; (b) a silane modified olefinic polymer; (c) a filler; (d) at least one of a desiccant and a water scavenger; and (e) an aging resistor, where the silane modified olefinic polymer includes a reactive group that chemically reacts with a polar surface including at least one of the alkoxy groups and the hydroxyl (-OH) groups to form a bond that is greater than the cohesive strength of the sealant composition and where the sealant composition has a tensile strength greater than 20 PSI and a lap shear strength greater than 20 pounds per square inch (PSI). The sealant composition has a tensile strength greater than 20 PSI and lap shear strength greater than 20 PSI. The sealant composition chemically reacts with a polar surface containing at least one of alkoxy groups and hydroxyl (-OH) groups, where the at least one of the hydroxyl groups includes glass or polyvinyl alcohol (PVA). It has an endothermic enthalpy for a peak approximately 100-140 degrees C less than 50 J/g upon four (4) weeks aging under 85% relative humidity 85 degrees C. It has an endothermic enthalpy for a peak approximately 100-140 degrees C less than 30 J/g, upon four (4) weeks aging under 85% relative humidity 85 degrees C. The sealant composition has a moisture vapor transmission rate (MVTR) less than 0.7 g/m2/day at 38 degrees C and 100% relative humidity for a 0.060 to 0.080 inch thick sample of the sealant composition. It has MVTR less than 15 g/m2/day at 85 degrees C and 100% relative humidity for a 0.060 to 0.080 inch thick sample of the sealant composition; or the sealant composition has MVTR less than 8 g/m2/day at 85 degrees C and 100% relative humidity for a 0.060 to 0.080 inch thick sample of the sealant composition. The sealant composition has a melt volume index (MVI) less than 50 cm3/10 minutes at 130 degrees C and 10 kg load through a 0.0823 inch diameter orifice. It exhibits a first viscosity when a first shear force is applied to the sealant composition and a second viscosity when a second shear force is applied to the sealant composition. The first viscosity of the sealant composition is greater than the second viscosity and the first shear force is less than the second shear force. The olefinic polymers are present in the sealant composition in an amount from about 20% to about 60% by weight of the total sealant composition; the silane modified olefinic polymer is present in the sealant composition in an amount from about 5% to about 25% by weight of the total sealant composition; and the filler is present in the sealant composition in an amount from about 5% to about 55% by weight of the total sealant composition. At least one of the desiccant and water scavengers is present in the sealant composition in an amount from about 2.5% to about 25% by weight of the total sealant composition. The aging resistor is present in the sealant composition in an amount up to about 3% by weight of the total sealant composition. Preferred Module: In the solar module, the sealant chemically reacts with a polar surface of at least one of the first and second substrates including at least one of the alkoxy groups and the hydroxyl (-OH) groups. The olefinic polymer of the sealant is present in the sealant in an amount from about 30% to about 60% by weight of the total sealant, the modified olefinic polymer is present in the sealant in an amount from about 2% to about 35% by weight of the total sealant, the fine-particle inert filler is present in the sealant in an amount from about 5% to about 55% by weight of the total sealant, the at least one of the desiccant and water scavenger is present in the sealant in the amount from about 2.5% to about 25% by weight of the total sealant, the aging resistor is present in the sealant in the amount from about 0% to about 3% by weight of the total sealant. The olefinic polymer of the sealant is present in the sealant in an amount from about 30% to about 50% by weight of the total sealant, the modified olefinic polymer is present in the sealant in an amount from about 5% to about 25% by weight of the total sealant, the fine-particle inert filler is present in the sealant in an amount from about 10% to about 30% by weight of the total sealant, the at least one of the desiccant and water scavenger is present in the sealant in the about 10% to about 15% by weight of the total sealant, the aging resistor is present in the sealant in the amount from about 0% to about 3% by weight of the total sealant. Preferred Sealant: In the sealant, the carbon black is included in an amount up to about 20% by weight. The olefinic polymer includes a polyisobutylene in an amount from about 30% to about 60% by weight of the total sealant composition, the at least one of the silane modified APAO and the silane modified polyisobutylene is included in an amount from about 2% to about 35% by weight of the total sealant composition, the filler is included in an amount from about 5% to about 47% by weight of the total sealant composition, the at least one of the water scavenger and the desiccant is included in an amount from about 2.5% to about 25% by weight of the total sealant composition, and the aging resistor is included in an amount from 0.1 % to about 3% by weight of the total sealant composition. The olefinic polymer includes a polyisobutylene in an amount from about 30% to about 50% of the total sealant composition. At least one of the silane modified APAO and the silane modified polyisobutylene is included in an amount from about 5% to about 25% of the total sealant composition. The carbon black is oxidatively post treated by a furnace process and included in an amount from 5 to 20% by weight of the total sealant composition, and where the sealant has a volume resistivity of greater than 1x106 ohms-cm. At least one of the water scavenger and the desiccant is a molecular sieve included in an amount from about 2.5% to about 30% of the total sealant composition. The sealant is oxidatively stable after 4000 hours of exposure to temperatures greater than 110 degrees C. The filler includes calcium carbonate or a silicate. A combination of the carbon black and the filler is included in an amount from about 10% to about 50%. The aging resistor includes a phenol antioxidant.