Hercules® Brush-on Block™ Thread Sealant is a smooth, high-performance blue pipe joint and gasket sealing compound. This lead-free, vibration-resistant thread sealant forms a tough, flexible seal on various metals and plastics. Behold the power of Hercules®, products built to last and trusted by plumbers to withstand even the toughest conditions.

• 8 oz. pipe joint and gasket seal
• Forms a tough, flexible and leak-resistant seal
• For use on joints, threads, valves, flanges, gaskets, pumps and tanks
• Compatible with metals including aluminum, black iron, brass, copper, stainless steel, galvanized steel and plastics, including PVC and CPVC
• Quickly provides leak-proof resistance to high-pressure, temperature, expansion, contraction and extreme vibration
• Non-hardening, non-separating and non-toxic
• Withstands up to 12,000 PSI on liquids and up to 2,600 PSI on gases
• Performs over a range of -90° to 450°F on steel pipe
• Can be used in automotive or industrial applications where vibrations occur