ThreeBond Liquid Gasket TB1207B 3.4 oz Black High-Temp Non-Slumping Adhesive Sealant

The ThreeBond High Performance/Adhesion Liquid Gasket TB1207B is a high-viscosity, non-slumping black gasket maker engineered to form durable seals on metals and plastics across -60° to 200° C.

TB1207B is a factory-specified liquid gasket designed for demanding automotive and industrial sealing tasks where vibration, torque, chemicals and wide temperature swings challenge ordinary sealants. It cures to a resilient, tacky gasket that resists oil, coolant and common chemicals, offering long-term adhesion in assemblies that see repeated thermal cycles and mechanical stress.

How does TB1207B perform under high vibration and torque?

TB1207B is formulated as a non-slumping paste with high cohesion so it stays in place during assembly and after curing. Its cured film handles continuous vibration and repeated torqueing without separation, making it suitable for engine housings and machinery covers.

• Non-slumping paste maintains bead shape during installation
• High torque endurance prevents fastener loosening
• Resilient cured gasket absorbs vibration without cracking

Will this gasket maker work on plastics and metal surfaces?

Yes. TB1207B bonds well to a wide range of metals and many plastics commonly used in automotive and equipment components. Prepare mating surfaces by cleaning oil, grease and old sealant for the best adhesion and cure.

• Strong adhesion to metal substrates like aluminum and cast iron
• Compatible with various engineering plastics when surfaces are clean
• Surface prep: degrease, remove loose residue, ensure dry before application

What temperature range and chemical resistance can I expect?

TB1207B is rated for continuous service between -60° and 200° C, covering cold starts to high operating temperatures. It also resists common automotive fluids, including oils, coolants and many chemicals encountered in workshop environments.

• Operates reliably from -60° to 200° C
• Resistant to engine oil, coolant and several industrial chemicals
• Maintains integrity after thermal cycling and exposure

How much product do I get and how is it best applied?

The product ships in a 3.4 oz tube sized for spot repairs and component assembly. Apply a continuous bead to one mating surface, assemble within the working time, and torque fasteners to specification; excess can be trimmed after partial cure.

• 3.4 oz (approx.) tube for controlled dispensing
• Apply bead, assemble parts while wet, allow recommended cure time
• Trim or scrape cured excess; follow safety and ventilation guidelines

Who is this for? The ThreeBond TB1207B liquid gasket suits mechanics, maintenance technicians, fabricators and DIYers who need a reliable, high-viscosity sealant for engines, pumps, gearboxes and other assemblies exposed to vibration, torque and variable temperatures. It’s ideal when a non-hardening, chemically resistant gasket is needed to maintain a leak-free joint across metal and compatible plastic parts.