RectorSeal
RectorSeal No. 5 25790 Pipe Thread Sealant, Lubricates & Protects Threads, Soft
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Highlights
- APPLICATION: RectorSeal No.5 is a non-hardening, slow-drying thread sealant made from special inert fillers dispersed in an oleoresinous base to facilitate its application to threaded pipe connections
- SOFT SETTING: Our pipe thread sealant is a soft-set, slow drying compound which seals, lubricates, and protects threaded pipe and fittings and will not dry out in the container
- POTABLE WATER SEALANT: RectorSeal No.5 pipe dope thread sealant lubricates and protects pipe threads; contains no metal; permits easy break out with no damage to threads
- PIPE COMPATIBILITY: For pipe made of galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene, reinforced fiberglass, and pvc. do not use on abs or cpvc; for natural gas and water lines up to 2" and pressure up to 100 psi, the piping system may be placed into immediate service; other services are recommended 24 hours after application
- FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets
- A soft setting, slow drying thread sealant
- It has withstood the test of time in a variety of uses and is widely known as the -Inchstandard of the industry-Inch
- Its low coefficient of friction allows tighter joint makeup with lower torque
- It also breaks out easily without galling, seizing, or damaging threads
- It is excellent for service where immediate pressurization is necessary
Why You'll Love It
- Soft-set compound seals and lubricates threaded connections without drying out in the container
- Low friction design allows tighter pipe joints with less torque required during assembly
- Disassembles smoothly down the road without galling, seizing, or damaging the metal threads
- Works across multiple materials including galvanized steel, copper, brass, iron, aluminum, and PVC
- Allows immediate pressurization for water and natural gas lines up to 2 inches and 100 psi
Pros
- +Will not dry out in the can
- +Immediate service on select gas and water lines
- +Breaks out easily without thread damage
- +Broad metal and plastic pipe compatibility
- +Metal-free formula safe for potable water
Cons
- -Not compatible with ABS or CPVC piping
- -Requires 24-hour cure time for higher-demand setups
- -Slow-drying formula remains soft rather than fully hardening
Detailed Review
RectorSeal No. 5 is a non-hardening, slow-drying pipe thread sealant designed for trade professionals and homeowners assembling threaded pipe systems. Formulated with inert fillers in an oleoresinous base, it provides lubrication and protection during assembly while creating a reliable seal on plumbing, HVAC/R, electrical, and construction fittings.
The compound lubricates threads to reduce friction, allowing you to achieve tighter joint makeup with lower applied torque. Because it is a soft-setting paste that does not contain metal, it also ensures easy breakout later without seizing, galling, or stripping pipe threads. It will not dry out inside the container, keeping it ready for repeat projects.
Material versatility is a major strength, as it works on galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene, reinforced fiberglass, and PVC. For standard natural gas and potable water lines measuring up to 2 inches under 100 psi, the system can be put into immediate service. For other applications, the manufacturer recommends waiting 24 hours after application.
Keep in mind that this sealant is explicitly not compatible with ABS or CPVC piping, so you will need an alternative compound for those materials. Additionally, projects falling outside standard low-pressure gas and water parameters require a full day of waiting before pressurization.
Verdict: RectorSeal No. 5 is a dependable choice for anyone working with compatible metal or plastic threaded pipes who needs easy joint assembly and clean disassembly. It is especially suited for tradespeople and DIYers handling potable water and low-pressure gas lines that require immediate turnaround.
Who Should Buy It
A great fit if you:
- Work on plumbing, HVAC/R, electrical, or construction pipe connections.
- Need immediate pressurization on potable water or natural gas lines up to 2 inches and 100 psi.
- Want a compound that allows easy disassembly without damaging pipe threads.
- Work with mixed materials like copper, brass, stainless steel, or PVC.
Consider something else if you:
- Are assembling pipes made from ABS or CPVC plastic.
- Require a fast-hardening, rigid seal rather than a soft-set compound.
FAQ
Which pipe materials can I use this sealant on?
It is compatible with galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene, reinforced fiberglass, and PVC.
Can RectorSeal No. 5 be used on ABS or CPVC pipes?
No, it should not be used on ABS or CPVC piping systems.
How long do I need to wait before pressurizing the lines?
Natural gas and water lines up to 2 inches at pressures up to 100 psi can be placed into immediate service. For other piping services, allow 24 hours after application.
Will the paste dry out inside the can over time?
No, the soft-set formula is designed so that it will not dry out in the container.
Photos
Product Specs
| Specification | Details |
|---|---|
| Material | Diacetone Alcohol |
| Brand | Rectorseal |
| Style | Squeeze tube |
| Item Weight | 1.6 ounces |
| Item dimensions L x W x H | 0.75 x 0.75 x 5.5 inches |
