Build and repair aquariums with confidence. Bigrizy Guard Aquarium Silicone is 100% silicone and solvent-free, making it safe for fish, plants, and invertebrates in both freshwater and saltwater setups. Available in clear and black 10.14 fl oz cartridges, it cures to a strong, fully waterproof bond ideal for glass-to-glass seams, baffle installs, terrariums, and vivariums. Our formula is non-toxic and fast-curing, delivering professional results for new tanks and leak repairs alike.