J-B Weld White Silicone Sealant - 31312

J-B Weld White Silicone Sealant - 31312

Restore a waterproof white seal on flexible joints with this universal/spec-match J-B Weld White Silicone Sealant - 31312. This white silicone sealant and adhesive is designed for household and mechanical sealing applications that need flexibility after cure.

31312 is a universal/spec-match J-B Weld white silicone sealant used when a repair needs a waterproof, mildew-resistant white bead on compatible surfaces. It is commonly used on tile, glass, fiberglass, plastic, wood, and similar materials where a white finished seal blends better than clear or red sealant.

Compatibility: Household, bath, shop, and appliance-adjacent sealing applications where a white RTV silicone is the correct repair material.

Please confirm the intended application, surface material, color, and cure profile before ordering.

Is it time to replace?

• Common Symptoms: Leaking seams, cracked white sealant, or flexible joints that need a fresh waterproof seal.
• Visible/Sensory Cues: Separated white silicone, stained bead lines, visible gaps, or old sealant that has dried and lost adhesion.

Pro Tip: Tool the bead promptly after application because white silicone shows uneven edges more readily than a clear seal.

Technical Specifications