Check the listing for details. Aqueon Aquarium Silicone Sealant Black 3 Ounces. Condition: New, Made in United States. Listed at 6.00 USD. The Aqueon Aquarium Silicone Sealant in black is a product designed for maintaining and sealing aquariums and fish tanks. With a capacity of 3 ounces, this sealant is specifically formulated for aquarium use, ensuring a secure and waterproof seal to keep fish and aquatic creatures safe and healthy. The trusted Aqueon brand name guarantees quality and reliability in providing a solution for aquarium maintenance and repair.