NOVELTY - 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 a tensile strength and a lap shear strength of the sealant composition is balanced such that the sealant fails cohesively before failing adhesively.    USE - The sealant composition is useful for preparing solar module and sealant (all claimed). Preferably, it can be used in two-pane or multi-pane insulating glass or solar modules.    ADVANTAGE - The invention provides edge sealants having balanced properties.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a solar module comprising a first substrate having a hydroxyl group; a second substrate having at least one of a hydroxyl group and an alkoxy group; at least one photovoltaic cell disposed between the first and second substrates; a sealant in contact with the first and second substrates to form a moisture vapor barrier to hinder moisture vapor from reaching the at least one photovoltaic cell, where the sealant includes: (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 a tensile strength and a lap shear strength of the sealant is balanced such that the sealant fails cohesively before failing adhesively and where the sealant has a tensile strength greater than 20 PSI and a lap shear strength greater than 20 PSI; and    (2) a sealant disposed between a first substrate and a second substrate, the sealant configured to inhibit the transmission of moisture to a moisture sensitive material disposed between the first and second substrates, the sealant comprises an olefinic polymers or its combinations; at least one of a silane modified amorphous poly-alpha-olefin (APAO) and a silane modified polyisobutylene; a carbon black; a filler; at least one of a water scavenger and a desiccant; and an aging resistor, where the at least one of a silane modified APAO and a silane modified polyisobutylene includes a reactive group that chemically bonds with the reactive group of the first and second substrates to form a bond that is greater than the cohesive strength of the sealant.