Silicone Aquarium Sealant The 100% silicone aquarium sealant is easy to apply and provides a long-lasting waterproof bond. Features: Permanently flexible and does not crack or shrink Waterproof seal stops leaks Same strength silicone used to manufacture new aquariums Non-toxic for use on fresh water and salt water aquariums Long-lasting bond is easy to apply. Price : $8.99
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