RectorSeal, 25300, Thread Sealant, Can, 5 qt, Yellow , 1.38, 20 to 140 deg F

25300 RectorSeal® No. 5 Multi-Purpose Pipe Thread Sealant – 1 Quart

RectorSeal® No. 5 is a professional, soft-set, slow-drying compound formulated for sealing, lubricating, and protecting threaded metal and plastic pipe connections. Designed for industrial and mechanical systems, this oleoresinous-based sealant provides a reliable pressure-tight joint that remains flexible for maintenance and adjustment. No. 5 is suitable for a wide range of piping materials and is compatible with multiple gases and fluids, including potable water, natural gas, air, and steam, within specified system parameters.

Technical Specifications

• Model: 25300
• Manufacturer: RectorSeal®
• Product Name: No. 5 Multi-Purpose Pipe Thread Sealant
• Form: Soft-Set Paste
• Base Material: Oleoresinous Compound
• Composition: Diacetone Alcohol and Oleoresinous Additives
• Color: Yellow
• Container Type: Can
• Container Size: 1 Quart
• Coverage: Approximately 0.81 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
• Pressure Rating: Immediate pressurization up to 100 PSI for pipe sizes ≤ 2" (natural gas, air, and water)
• Applicable Materials: Steel, Iron, Brass, Copper, Aluminum, Stainless Steel, Polyethylene, Fiberglass-Reinforced Pipe, PVC
• Not Recommended For: ABS, CPVC, Oxygen, Chlorine, or Other Oxidizers
• Odor: Mild
• Classification: Consumer Commodity ORM-D
• Application Type: Threaded Joints in Mechanical, Plumbing, and HVAC Systems

Professional Notes

RectorSeal® No. 5 is a field-proven compound providing long-term joint integrity and corrosion protection in threaded piping systems. Its soft-set formulation prevents galling and seizing during assembly, ensuring uniform thread engagement and easy disassembly for future maintenance. The sealant remains pliable under temperature cycling and system vibration, maintaining joint integrity without hardening or cracking. Suitable for both pressure and non-pressure systems, No. 5 provides consistent sealing in metallic and compatible thermoplastic piping used in gas, water, and air systems.

Summary

The RectorSeal® No. 5 Multi-Purpose Pipe Thread Sealant (25300) offers a professional-grade sealing compound engineered for reliability in industrial, commercial, and mechanical applications. Its oleoresinous, non-hardening formula ensures secure threaded joints, effective lubrication, and corrosion protection across a range of piping materials. With its wide service temperature range, immediate pressurization capability, and compatibility with natural gas, air, and water systems, No. 5 remains an industry standard for professional contractors and system installers.