Bund

Penetration Sealing

For a bund to be effective it must be watertight and impermeable to liquid egress. GPT are proud experts in effectively sealing cable/pipework entries into bund walls and floors, ensuring secondary containment remains watertight & compliant.

What is Bund Penetration Sealing?

Where pipes or cables enter your secondary containment through the walls or floor it is essential that the joints are effectively sealed to ensure the bund remains watertight and resistant to attack from the material it holds. Unsealed or poorly sealed penetrations compromise containment, leading to environmental risks and regulatory non-compliance.

We specialize in sealing bund entry penetrations to ensure compliance with key regulations and standards such as The Oil Storage Regulations and CIRIA C736. We perform this requirement for a range of clients and can seal the likes of transformer bunds which contain live high voltage cables running through them.

Our safe and effective system of work for projects involving live high voltage cables, approved by major utility companies’ safety teams, includes:

Removing existing ducting and filler to ground level
Preparing the floor and installing packers to ensure the void is completely filled
Applying a chemical and oil resistant seal to ensure the bund is watertight

Common Issues

We encounter many situations where effective bunding is compromised when the floor or walls are cored to allow pipework or cables to enter the bund. This is effectively like removing the plug from a bath and expecting it to hold water.

These types of penetrations are often filled with expanding foam, which fails to provide a liquid-tight seal, allowing oil or other hazardous substances to escape.

Ineffective bund sealing like this can lead to: