# What is the maximum pressure that JB Weld can withstand?

JB Weld, a brand name of steel-reinforced epoxy, makes claims of being the "world's strongest bond".

What is the maximum pressure it can withstand, and what is it about the interaction between the steel and the epoxy that makes it so strong?

This is only a partial answer, addressing the maximum pressure a JB weld can withstand. I am still thinking about the reason for the strength so I will leave it to the 'real' chemists among you for now.

According to Repair Products the JB weld in fully hardened state has the following properties (in psi):

Tensile Strength:   3960