TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The fine particle fillers of sealant are precipitated chalks, silicates, lime, silicon oxides and carbon blacks. The fillers further include fine particle fillers (5-50 wt.%). The chalks of the sealant are surface-treated calcium carbonate. The silicates of sealant are talc, kaolin, mica, silicon oxides, silicas and calcium or magnesium silicates. The desiccants or water scavengers of sealant are molecular sieves, phosphorus pentoxide, calcium oxide, anhydrous salt, epoxidized vegetable oil, carbodiimide and/or p-toluenesulfonyl isocyanate. The desiccants or water scavengers of sealant are molecular sieves (zeolites) of types 3A to 10A.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The aging resistors of sealant are sterically hindered phenols, thioethers, mercapto compounds, phosphorus esters, benzotriazoles, benzophenones, hindered amine light stabilizers (HALS) and antioxidants.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The amount of olefinic polymers are 5-50 wt.%. The amount of silane modified polymer is 5-30 wt.%. The olefinic polymers are polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), styrene-ethylene-butylenestyrene (SEBS), styrene-ethylene-propylene-styrene (SEPS), styrene-isoprenebutadiene-styrene (SIBS), styrene-polyisobutylene-styrene (SPIBS) and amorphous copolymers and/or terpolymers of alpha -olefins (APAO). The silane modified polymer is polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, SBS, SIS, SEBS, SEPS, SIBS, SPIBS, and amorphous copolymers and/or APAO. The APAO polymers are modified with at least one group of formula (-A-Si(R22-b)(Xb)-O-Si(R13-a)-Xa)n which is a terminal group or is distributed statistically within the chain. The unsaturated or reactive polyolefins are ethylene-propylene drive monomers, polyolefin acrylates, and halobutyls. The mol. wt. of olefinic polymers is 5000-1000000 D.-A-=-(CH2)m-, S-(CH2)m or NH-C(=O)-NH-R3;R1, R2=1-10C alkyl, 6-20C aryl, 7-20C aralkyl;X=OH or hydrolyzable group;a=0-3;b=0-2; ora+b= greater than or equal to 1;n=0-18;m=0-4; andR3=-(CH2)m-NH-(CH2)m.