If you work and/or play in the automotive world, you’re familiar with a product called J-B Weld. J-B Weld is a two-part epoxy adhesive (or filler): an epoxy resin (black tube) and a hardener (red tube). When mixed together in equal portions, a chemical reaction occurs that turns the mixture into a rock-solid compound once cured, offering tensile strengths of up to 3,960 psi; heat resistance up to 500 degrees Fahrenheit; and is impervious to water, gasoline, chemicals, and acids. Since the introduction of J-B Weld in 1968, consumers have thought and heard of many uses for this do-it-all epoxy, ranging from plugging radiator leaks to repairing cracked intake manifolds. J-B Weld is known as a great tool for closing voids and sealing cracks, so we figured it would be the perfect product for repairing our scuffed/gashed Subaru engine block surface. Simply masking the problem by applying thick globs of silicone sandwiched between the damaged block and oil pan would serve as a quick fix, but only leak over time. Instead, we mixed up some J-B Weld and applied the epoxy to the damaged area before smoothing it out using a razor blade. A clean shop rag was used to wipe away excess material before allowing the epoxy to cure for 24 hours. After it had cured, it was time to sand and/or grind the block surface flat before reinstalling the oil pan. Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!