Product · Leak Sealing

Internal Sealing Bag

Name: Internal Sealing Bag
Brand: HANGYIXIAOFANG

Inserted into the pipe and inflated from inside, the internal sealing bag plugs leaks in drains and pipelines, prevents groundwater contamination and contains hazardous liquids and fire-fighting water.

Internal sealing leak-plugging air bags in multiple sizes

Seal Pipes from the Inside, Up to 10 m Back-Pressure

The internal sealing bag is used when a hazardous-substance leak occurs — it seals culverts and drainage pipes to protect groundwater and public safety, and holds back liquids that risk polluting the environment.

2.5 bar — hugs the pipe inner wall at all points and resists a back-pressure head of at least 10 m
Long-lasting seal — one inflation seals for a long time; re-inflate as needed during repair
Rapid deployment — quick-connect coupling; insert, connect and inflate in moments
Chemical resistant — passes gasoline, acid and alkali tests without cracking

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Features

Why Internal Sealing Bags Work

2.5 bar Operating Pressure

The bag fits tightly against the inner wall of the pipe at all points, resisting a back-pressure head of at least 10 metres.

Excellent Performance

A single inflation provides a long-lasting seal, and the bag can be re-inflated as needed to ensure smooth emergency repairs.

Rapid Deployment

A quick-connect coupling links the air source to the bag; once inserted into the pipe it can be connected and inflated in a very short time.

Specifications

Specifications & Models

No.	Item	Test Condition	Indicator
1	High & low temperature resistance	-25°C / 60°C × 2h folding	Crack-free
2	Gasoline resistance	97# gasoline, 1 h	No cracks, non-sticky
3	Acid resistance	80% H₂SO₄, 60% HNO₃, 30% HCl, 1 h	Impermeable, non-stick, non-brittle
4	Alkali resistance	6.1 mol/L NaOH, 1 h	Impermeable, non-stick, non-brittle