RectorSeal, 25431, Thread Sealant, Can, 1 pt, Yellow , Paste, 1.38

25431 RectorSeal® No. 5 Multi-Purpose Pipe Thread Sealant – 1 Pint

RectorSeal® No. 5 is a professional-grade, soft-set, slow-drying thread sealant formulated for sealing, lubricating, and protecting threaded pipe and fittings across a wide range of industrial and mechanical systems. Engineered with an oleoresinous base and designed for long-term performance, No. 5 provides a reliable pressure-tight seal on both metal and plastic threaded connections. The compound’s non-hardening characteristics allow for easy disassembly and reassembly without thread damage, making it suitable for maintenance and new construction installations alike.

Technical Specifications

• Model: 25431
• Manufacturer: RectorSeal®
• Product Name: No. 5 Multi-Purpose Pipe Thread Sealant
• Form: Soft-Set Paste
• Base Material: Oleoresinous Compound
• Composition: Diacetone Alcohol and Related Oleoresinous Additives
• Color: Yellow
• Container Type: Can
• Container Size: 1 Pint
• Coverage: Approximately 0.53 cu-ft
• Specific Gravity: 1.38
• VOC Content: 317 g/L
• Flash Point: 150°F (65°C)
• Flammability Rating: 2 (per NFPA classification)
• Temperature Range: -40°F to 125°F (-40°C to 52°C)
• Drying Characteristics: Slow-Drying, Non-Hardening
• Applicable Materials: Steel, Iron, Brass, Copper, Aluminum, Stainless Steel, Polyethylene, Fiberglass-Reinforced Pipe, PVC
• Not Recommended For: ABS, CPVC, Oxygen, Chlorine, or Oxidizing Agents
• Pressure Rating: May be pressurized immediately for piping up to 2" and 100 PSI (natural gas, air, and water applications)
• Applications: Suitable for threaded joints carrying natural gas, air, water, steam, hydraulic oils, and other non-oxidizing fluids
• Odor: Mild
• Classification: Consumer Commodity ORM-D

Professional Notes

RectorSeal® No. 5 is formulated for use across diverse mechanical, plumbing, and HVAC systems requiring secure threaded joint sealing. Its oleoresinous base delivers stable sealing performance across variable temperature and vibration conditions. The compound maintains thread lubrication during assembly, reducing galling on metallic threads and preventing stress cracking in compatible plastics. The sealant’s soft-set nature supports future maintenance operations, allowing easy disassembly without thread degradation. No. 5 is suitable for both pressure and non-pressure systems and remains effective under thermal cycling and system vibration.

Summary

RectorSeal® No. 5 Multi-Purpose Pipe Thread Sealant (25431) provides a dependable, non-hardening joint seal for professional mechanical and plumbing applications. Its compatibility with a wide range of metals and plastics, immediate pressurization capability up to 100 PSI, and reliable sealing properties make it a standard product for field and plant environments. Engineered for durability and serviceability, No. 5 supports consistent sealing integrity and long-term system reliability in professional installations.