J-B Weld

Buying Guide: Choosing a J-B Weld Adhesive or Sealant

Epoxy Putties and Pastes
TankWeld is a steel-reinforced epoxy putty that sets in 5 minutes and can be drilled after 60 minutes. Putties come in sizes such as 1 oz. and 2 oz., and the KwikWeld automotive adhesive paste comes in 10 oz. Read the manufacturer's instructions for set and cure times before you start a repair.

RTV Silicone Adhesive Sealant Gels
The RTV silicone gels come in 3 oz. sizes in clear, white and black. The white and clear gels are general purpose sealants for household or mechanical assembly, and they cure from moisture in the air to form a tough, waterproof, mildew and mold resistant seal on most surfaces. Read the manufacturer's instructions for cure time before you plan a repair.

Gasket, Marine and Plastic Adhesives
Ultimate Grey RTV Silicone Gasket Maker and Sealant is a 3 oz. silicone for mechanical assemblies where higher torque or closely spaced bolt profiles are involved. MarineWeld is a 0.85 oz. liquid, and Plastic Bonder is a two-part urethane system sold as a liquid and a paste. Check the vehicle or equipment manual before you choose a gasket sealant, and follow the manufacturer's instructions.

Frequently Asked Questions

What does J-B Weld make?
J-B Weld makes epoxy putties and pastes, RTV silicone adhesive sealant gels, Ultimate Grey RTV Silicone Gasket Maker and Sealant, MarineWeld marine adhesive and sealant, Plastic Bonder adhesive, WoodWeld wood epoxy and FiberWeld fabric repair wraps. Its products come in sizes such as 0.85 oz. and 10 oz.

How do I choose the right J-B Weld product?
Start with the job, such as a metal repair, a gasket, a wood repair or a plastic part, and then check the product name for the form, such as putty, paste, gel or liquid. Read the manufacturer's instructions for set and cure times, and match the part number on your old product before you order.

Does J-B Weld make a gasket sealant?
Yes. The RTV silicone gasket maker and sealant is a 3 oz. product for mechanical assemblies where higher torque or closely spaced bolt profiles are involved. Check the vehicle or equipment manual for the gasket and sealant it calls for, and follow the manufacturer's instructions when you apply it.