Valve Sealants

Valve sealants restore the seal between the gate, plug, or ball and the valve body, stopping leaks and freeing seized valves while the line stays in service—no teardown required. PE Energy supplies injectable valve sealants and lubricants for sour-gas wellheads, pipelines, and refineries across the U.S., including H2S/CO2 sour-service, winter-grade low-temperature, high-temperature, and hydrocarbon-resistant grades from Everlast, Formasil, Val-Tex, and Sealweld.

Which valve sealant should I use?
Match the sealant to your service condition—the gas or fluid in the line, the temperature, and the valve type. The table below maps common oil-and-gas service conditions to a stocked product; every entry links to its live spec and ordering page.

Service conditionRecommended sealant

Sour service — H2S & CO2, ball & gate valvesEverlast 50-400
Sour service — H2S & CO2, combined lubricant/sealantEverlast 50-500
Plug valves — high-viscosity H2S/CO2Everlast 50-400 HV
Low-temperature / winter H2S & CO2Everlast 50-300
Severe corrosive serviceEverlast WR
High-temperature valvesEverlast 1000
Hydrocarbon-resistant (oil & gas)Everlast 146
Extreme-pressure (EP) valve lubricantEverlast 117 EP
CO2 service sealantFormasil CO2
CO2 service — winter gradeFormasil CO2 Winter Grade
Water / produced-water (H2O) serviceFormasil H2O
Winter-grade general serviceFormasil RS Winter Grade
Refined-gas / general serviceFormasil RG
Heavy-duty serviceFormasil HD
General-purpose sealantFormasil RS
Water-resistant sealantFormasil WR
Valve stem packing1900 TFE Seal · Sealweld Slick Sticks · Pack King #301

What is a valve sealant?
A valve sealant is a heavy, injectable compound forced under pressure into a valve’s sealant grooves through a fitting on the body or bonnet. It fills the gap between the closure member—gate, plug, or ball—and the seat, re-establishing a tight shutoff and lubricating the moving surfaces. Because it is injected through an external fitting, a leaking or stiff valve can be resealed under pressure without removing it from the line.

What valve sealant is best for H2S and CO2 (sour) service?
Sour service requires a sealant that resists chemical attack from hydrogen sulfide (H2S) and carbon dioxide (CO2) rather than washing out or hardening. The Everlast 50-series—50-400 for ball and gate valves, 50-500 as a combined lubricant/sealant, and the high-viscosity 50-400 HV for plug valves—is formulated for H2S/CO2 sour-gas duty, alongside the Formasil CO2 sealant. For corrosive service that is also abrasive or wet, the Everlast WR severe-corrosive grade applies.

Which valve sealants work in cold weather or low temperatures?
Standard sealants stiffen as temperatures drop, making winter injection difficult and slowing valve response. Winter-grade formulations stay pumpable in cold climates: the Everlast 50-300 low-temperature H2S/CO2 sealant, the Formasil CO2 Winter Grade, and the Formasil RS Winter Grade. For high-temperature valves, the Everlast 1000 high-temperature grade is the counterpart.

Does the sealant differ for gate, plug, and ball valves?
The valve type drives the viscosity and the way the sealant seats. Plug valves typically use a higher-viscosity grade, such as the Everlast 50-400 HV, to hold pressure across the tapered plug. Gate and ball valves use the standard-viscosity Everlast 50-400 family. When the gas or fluid composition matters more than the valve body, match the chemistry first—sour, CO2, hydrocarbon, or water service—then confirm viscosity for the valve.

What is the difference between a valve sealant and a valve lubricant?
A valve lubricant reduces friction so the valve operates smoothly; a valve sealant does that and also forms a pressure-tight barrier that stops leakage past a worn seat. Many oilfield products do both—the Everlast 50-500, for example, is a combined lubricant/sealant. For pure lubrication and lighter-duty lube-sealants such as the Val-Tex and Everlast lubricant lines, see our valve lube sealants category.

Can’t find the right valve sealant?
If you know the gas composition, temperature range, and valve type but not the grade, our team will spec it for you and confirm pricing and lead time. Send the details and we’ll match a sealant to your service—request a quote and we’ll respond promptly. Not sure which sealant fits your service? See the valve sealant selection guide by service media and temperature (Val-Tex 80, 80-HM, 972, 750, 2000, Valve Flush and more).