J-B Weld 31310 Silicone Adhesive Sealant High Strength Gel 3 oz Clear Seal, bond, and protect with confidence using the J-B Weld 31310 Clear Silicone Adhesive Sealant, a high-strength, RTV (room temperature vulcanizing) gel designed for reliable performance in both household and mechanical applications. This 3 oz clear gel formula creates a durable, waterproof bond on a wide range of materials including steel, ceramic, glass, rubber, cloth, and most plastics, making it ideal for repairs, sealing, and assembly tasks around the home, garage, or workshop. Formulated as a high-strength gel, this silicone sealant resists shrinking, cracking, and peeling over time, maintaining its integrity under temperature fluctuations and environmental stress. Once applied, it cures upon exposure to moisture in the air, forming a tough, permanently flexible seal that remains effective for up to 10 years. The clear dry color ensures a clean, nearly invisible finish?perfect for aesthetic-sensitive areas. With a service temperature range of 32F to 400F, this sealant performs reliably in extreme hot and cold conditions, making it suitable for use near engines, exhaust components, appliances, and outdoor fixtures. It is heat resistant, moisture resistant, and mold mildew resistant, ensuring long-term protection in damp or humid environments such as bathrooms, kitchens, and marine settings. The sealant reaches tack-free status in approximately 60 minutes (1 hour) and fully cures in 24 hours. It can be applied in temperatures between 40F and 100F for optimal adhesion and curing performance. Its slight odor dissipates quickly during cure, and with a low VOC content of 3 g/L and a flammability rating of 0, it offers a safer, more environmentally conscious option for indoor use. Weighing 0.300 lb and packaged in a 3 oz cartridge, the product is lightweight and ready for use with a standard caulking gun. The gel consistency allows for precise application with minimal drip or sag, even on vertical or overhead surfaces. Features - 3 oz clear silicone adhesive sealant for strong, flexible bonding - High-strength gel formula resists shrinking, cracking, and weathering - Permanently flexible after curing?moves with substrates without breaking the seal - Bonds steel, ceramic, glass, rubber, cloth, and most plastics - Waterproof and moisture resistant?ideal for wet or humid environments - Mold and mildew resistant for use in bathrooms, kitchens, and marine areas - Service temperature range: 32F to 400F - Heat resistant and durable for automotive and mechanical applications - Cures in 24 hours, tack-free in 60 minutes - Odor is slight and dissipates quickly - Low VOC content (3 g/L) and non-flammable (Flash Point: 212F) - Safe for use around sensors and sensitive components - Indoor/outdoor use for versatile application - Longevity of up to 10 years Specifications - Brand Name: J-B Weld - Model Name: J-B Weld 31310 - Part Number: 31310 - UPC: 043425313102 - Product Type: Silicone Adhesive Sealant - Product Form: Gel - Form: Gel - Container Size: 3 oz - Color: Clear - Dry Color: Clear - Color Family: Clear - Material: Silicone - Adhesion Strength: High Strength - Curing Time: 24 hr - Cure Time (Hr.): 24 - Set Time: 1 hour - Dries To Touch (Min.): 60 - Drying Time: 1 hour - Application Temperature: 40F to 100F - Service Temperature Range: 32F to 400F - Specific Gravity: 1.007 - VOC Content: 3 g/L - Flash Point: 212F - Flammability Rating: 0 - Odor/Scent: Slight - Applicable Materials: Ceramic, Cloth, Glass, Rubber, Steel - Recommended Surface Type: Steel - Moisture Resistant: Yes - Heat Resistant: Yes - Mold and Mildew Resistant: Yes - Permanently Flexible: Yes - Longevity (Yr.): 10 - Number in Package: 1 pk - Each Weight: 0.300 lb - Weight: 0.1875 lb (net content) - Manufacturer: J-B Weld - Country of Origin: United States Product Application The J-B Weld 31310 Clear Silicone Adhesive Sealant is designed for general-purpose bonding and sealing in residential, automotive, and light industrial settings. Ideal for sealing gaps around windows, doors, plumbing fixtures, and vents, it also performs well in mechanical applications such as gasket sealing, wire harness bundling, and component mounting. Its flexibility, durability, and resistance to environmental factors make it a trusted solution for creating long-lasting, waterproof seals indoors and outdoors. Whether used for DIY repairs or professional maintenance, this high-strength gel delivers reliable performance across a wide range of materials and conditions.