I've heard / read of glass tanks lasting years ... as in decade(s) without any resealing. An indoor aquarium is free of the weather elements that would wear away silicone sealants. Aquariums are ... for the most part ... kept at a constant temperature and the silicone doesn't dry and then get wet on a constant cycle.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.