Monthly Archives: August 2023

Safety Factor (SF)

By Jeff Wright – GBI VP of Technical Services

At Gougeon Brothers, Inc. we are always measuring the ultimate strength of our epoxy products, their adhesive strength, and the strength of the resulting composite laminates (The values measured are often impressive, and the numbers for real-world applications may seem unbelievable). For example, the tensile strength on our Technical Datasheet (TDS) for 105 Epoxy Resin® and 205 Fast Hardener® is 7,900 psi. This means I could easily hang my Chevrolet® Silverado with a full payload using a 1″ x 1″ casting of epoxy! This is true in a perfect application, but our common sense tells us that it is risky. That common sense may be because we understand the need for a safety factor (Sf) in our calculations. Continue reading