Gaseal 1L, 2L, 3L anaerobic sealants for repairing leaks in bell-and-spigot joints of cast iron gas mains (10–15 psi)

Country: United Kingdom · Model: Gaseal 1L / 2L / 3L

Gaseal 1L, 2L and 3L are anaerobic sealants for eliminating leaks in bell-and-spigot joints of cast iron gas mains operating at a pressure of 10–15 psi (about 0.7–1.0 bar). All three compounds are one-component, 100 % reactive and solvent-free. They differ in color and viscosity, so there is a grade for each type of leak.

Purpose: sealing leaks in bell-and-spigot and mechanical bell-and-spigot joints of cast iron gas mains
Network pressure: low per the manufacturer's classification, 10–15 psi (≈0.7–1.0 bar)
Gaseal 1L: blue, medium viscosity, base formulation for most repairs
Gaseal 2L: bright red, thixotropic, high viscosity, for large leaks

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Technical specifications

Purpose	sealing leaks in bell-and-spigot and mechanical bell-and-spigot joints of cast iron gas mains
Network pressure	low per the manufacturer's classification, 10–15 psi (≈0.7–1.0 bar)
Gaseal 1L	blue, medium viscosity, base formulation for most repairs
Gaseal 2L	bright red, thixotropic, high viscosity, for large leaks
Gaseal 3L	yellow, ultra-low viscosity, for narrow cracks, pinholes, pre-assembled joints
Composition	one-component, 100 % reactive, solvent-free
Technology	without opening the road surface, without sandblasting or digging under the pipe

Specifications are taken from the manufacturer’s technical documentation. Updated 11/10/2026.

Description

The sealant is introduced into the bell-and-spigot joint or the mechanical bell-and-spigot joint and penetrates the gap along the leak paths. In a narrow gap without access to air the compound cures and forms a strong seal. No mixing is needed, and sandblasting and digging under the cast iron pipe are eliminated, so the repair is done without opening the road surface and reduces earthwork. By the manufacturer's classification these are low-pressure networks, but under Ukrainian regulations 10–15 psi exceeds 5 kPa, and this should be taken into account when granting permission for the work. The Gaseal brochure contains a table for choosing the grade by leak type, and the method of introduction into the joint is agreed with the manufacturer.

How to choose

The grade is determined by the type of leak. Gaseal 1L, a blue liquid of medium viscosity, covers most repairs and flows well along the typical leak paths in cast iron bells. For very narrow cracks, pinholes and already assembled joints take the yellow 3L of ultra-low viscosity with good capillarity. For large leaks the bright red thixotropic 2L is needed, because the increased viscosity keeps the sealant in a wide channel until it cures.

Request a price and lead time

Gaseal 1L, 2L, 3L anaerobic sealants for repairing leaks in bell-and-spigot joints of cast iron gas mains (10–15 psi). We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

How do Gaseal 1L, 2L and 3L differ?

1L is blue, medium viscosity, the base formulation. 2L is bright red, thixotropic and high-viscosity for large leaks. 3L is yellow, ultra-low viscosity, for narrow cracks and pinholes.

For what gas main pressure is Gaseal rated?

According to the manufacturer, for networks of 10–15 psi, that is about 0.7–1.0 bar. Under Ukrainian regulations such pressure exceeds 5 kPa.

Does the road surface need to be opened to repair a bell joint?

No. The sealant is introduced into the joint, sandblasting and digging under the cast iron pipe are not needed, so the amount of earthwork is smaller.

Does Gaseal need to be mixed or thinned with solvent?

No, all compounds are one-component, 100 % reactive and solvent-free.

Which Gaseal should be used for a pinhole?

The yellow Gaseal 3L of ultra-low viscosity with good capillarity, which is effective in very narrow cracks and pinholes.