SealGuard Inc Polyurethane Grout ISO 9001
Stop Water I&I

"Fast, easy,
permanent repairs"

"Technical support was polite,
fast and accurate"

"SealGuard makes water control simple"
"This stuff works!"

"SealGuard II makes I & I remediation
cost effective, efficient and fast"

"SealGuard staff walked me through my project
step by step until I got the water stopped"

"X-Seal is a huge improvement over the mortar
we used before, it is so much faster and easier"

"We stopped a 50 gpm leak in about
15 minutes, including set up"

Grouting at Ground Zero


The 9/11 terror attacks on the world trade centre were utterly devastating, as two of the most recognisable towers became ablaze, pouring out plumes of thick dark smoke, creating a terrifying sight as the world looked on in disbelief, before disappearing from the Manhattan skyline forever. The attack resulted in the tragic deaths of 2800 people, sending the American nation into a deep state of grief.

Before the attacks, the twin towers were nicknamed David and Nelson, after the famous Rockefeller brothers, who were part of the banking and political family that made one of the world’s largest private fortunes, an apt reference for the World Trade Centre. It also emphasised the brotherly similarity between the twin towers, standing side by side in union as a defining feature of Manhattan’s impressive face. Although the tall buildings were referred to as the twin towers they were not identical; they actually differed in height; the first tower was built in 1972, measuring 417 metres and the second built a year later, at a slightly smaller 415 metres.

It took a staggering 100 days for the last fires in the World Trade Centre to stop burning. Fires would flare up as demolition and rescue crews unavoidably exposed debris to the air. Even with all the fires extinguished, hot pockets still existed which continued to make ground zero an active fire scene.

The twin towers were exposed to an overwhelming amount of trauma, along with the fires that followed, spurting water exacerbated the site’s chaotic character. High volumes of water have powerful erosive properties; gushing flows can have a damaging effect that threatens the integrity of structures in a short space of time.

The collapse of the twin towers caused damage to the perimeter support wall which held back groundwater next to the surrounding Hudson River, leading to high pressure leaks of up to 200 gallons per minute, which threatened the stability of the remaining structure. To prevent collapse, grout was injected into cracks to target individual flows. Polyurethane grout is a permanent, flow repair sealant that gets to work without delay, tackling the most demanding of tasks with ease and effectiveness.

The site has now been made safe, free from fire, debris and leaks, so that a six acre memorial can open in 2011 to mark the 10th anniversary of the attacks. The memorial is to be named ‘Reflecting Absence’ and is to use the beauty and peaceful rumblings of water in the form of waterfalls and illuminated pools, where each tower once stood to pay tribute to the victims. The names of the people that lost their lives will be inscribed around the edge of the waterfalls, creating an area of peace and contemplation where once there was devastation.


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