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Company Information
TBM Launch Pit Injection
Grouting contractor Sub-Technical, Inc. injects SealGuard II into a launch pit for a tunnel boring machine to stop water infiltration. SealGuard II is fast reacting a dual component polyurethane grout. In this instance, it was injected with a pneumatic pump and a mechanical packer. Note th... Read More
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TBM Water control Launch Pit Tunnel Rib
Tunnel Boring and Grouting
The entrance of a tunnel being created by a tunnel boring machine can be as fascinating as the TBM itself. Countless systems are being fed and networked to workers miles away. That intricacy doesn’t just stop there. Even a seemingly simple task like routine maintenance ca... Read More
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Polyurethane Injection Grout TBM ground consolidation stabilization water control
Leaking Valve Sealed with Grout
A municipality needed to seal off a leaking water main valve in order to decommission the system. They decided injecting polyurethane grout into the valve would be their best option in this situation. Although this is not a common application, it will provide the desired outcom... Read More
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leaking water valve decommission body polyurethane grout
Intake Shaft Water Leak
Pictured is the looking down view of a high-pressure water leak, in an intake shaft of a mine. The water intrusion was 200 feet below the surface, and forceful enough to hit the other side of the shaft. Within the smaller box shows the leak sealed off. This was done with the polyurethane g... Read More
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water control mine shaft high pressure leak
Rescuing a Turn of the Century Culvert under a New York Rail Line
As winter approaches, a heavy rain event proved to be “the straw which broke the camel’s back” for this turn of the century block and brick-built tunnel.
Heavy rains recently caused the loosening and partial collapse of the structure internally. Constructed of four row... Read More
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rail culvert tunnel repair sinkhole collapse
Curtain Grouting with Lances
In many situations, controlling water infiltration from inside the structure is not an option. These concrete waste tanks were allowing groundwater to enter, creating a substantial expense for the treatment plant. The solution was to curtain grout the exterior walls of the stru... Read More
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curtain grounting polyurethane infiltration sewage treatment
Concrete Segment Polyurethane Injection
Leaking concrete segments are injected with polyurethane grout in a tunnel that was created by a tunnel boring machine. The grout used was Hyperflex, which is injected as a liquid. The liquid material reacts with moisture and creates a hydrophobic foam to stop the infiltration.
... Read More
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TBM Segment Concrete Injection Seal leak Tunnel Grouting Polyurethane
Tunnel Grouting after a TBM
Tunnel boring with a TBM creates many opportunities for polyurethane grouting.
For instance, the tail seal brushes of a tunnel boring machine are coated with grease to act as a water barrier, as ground water needs to be kept in the front of the machine. Over time the brushes wear out an... Read More
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Tunnel water control. TBM Boring Machine Polyurethane Grout Concrete
Injection Into Steel
Injecting polyurethane grout into steel is not as common as concrete injection, however it can still yield great results. The biggest difference being an injection port instead of a traditional packer. This port was created by first welding a threaded coupler near the leaking area. A magne... Read More
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steel polyurethane injection sheet pile water control
A Unique Grouting Setup
Parent company Sub-Technical, Inc was called in to reinforce a SealGuard customer on a grouting job that became too overwhelming. Upon arrival, Sub-Technical employees couldn’t help but notice their pumping setup. After 20 plus years of polyurethane grouting experience, t... Read More
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Hyperflex Chemical Grout Pump Airless Paint Sprayer
Shrinking Concrete
Concrete shrinks. In this instance, it was allowing an unwanted transfer of water. When constructed, this corrugated HDPE pipe was encased in concrete to limit erosion and to ensure that no back-flow could occur. A back-flow valve was also placed inside the pipe. Ho... Read More
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shrinking concrete back-flow repair hyperflex polyurethane grout
Retaining Pond Standpipe
Mine discharge was infiltrating an overflow flow pipe located in a retention pond. The continuous flow of the contaminated water was causing environmental concerns at the exit location. Using the polyurethane grout Hyperflex, grouting contractor Sub-Technical was able to stop t... Read More
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AMD Retention Pond Overflow Pipe Repair Infiltration
Limestone Pit Water Control
Parent company, Sub-Technical, Inc demonstrates the ability of SealGuard II being able to stop large inflows of water.
... Read More
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Limestone Pit water Control
14 Year Old Grout Still Impresses
SealGuard, Inc., manufacturer of SealGuard II polyurethane grout, recently received an interesting call from a customer. The customer stated that he found a SealGuard II starter kit in their warehouse with a date of 2004 marked on the box. Apparently, the employee who purchased it origi... Read More
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water control polyurethane grout injection
Mining: Water, Ground, and Gas Control Challenges
Mining encompasses many challenges for ground, water, and gas control. However, injection of polyurethane grout can provide a permanent fix. Grouting contractor Sub-Technical, Inc. has been providing solutions for over 25 years. Emergency roof control, massive inundations of water, and ... Read More
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Mine Roof Control Water ventilation Seals High Pressure Grouting Coal
Leaking Sandbags Sealed
During a recent bridge replacement, sandbags were used to create a dry work area in the middle of a river. However, the sandbags could not created a water tight seal. SealGuard's parent company, Sub-Technical Inc. was called to control the water. After SealGuard II... Read More
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SealGuard Sandbag bridge replacement Sub-Technical leaking sandbags coffer dam
SealGuard Inc. Obtains ISO 9001:2015
ISO 9001:2015 Certification Earned By SealGuard Inc.
(Pittsburgh, PA) SRI Quality System Registrar is pleased to announce that it has recently awarded an ISO 9001:2015 Management System certificate to SealGuard Inc., located in Gibsonia, Pennsylvania, for the manufacture and distri... Read More
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polyurethane grout ground control water
Broken Sewer Lateral
After a recent pipe lining, a sewer camera discovered that a lateral was leaking groundwater perfusly. After excavation, it was discovered that a 3" section of the pipe was missing at the connection. One set of SealGuard II fixed the problem and saved the township from ... Read More
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Sewer Lateral Repair
HyperFlex Fixes Serious Leak in Partial Natural Swimming Pool
SealGuard was approached by the general manager of a 3,500 acre game preserve in the center of Texas to provide technical assistance and material to fix a large partially natural swimming pool. It was suffering from both heavy outflow when full and heavy inflow of dirty groundwater during ... Read More
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HyperFlex Leak Swimming Pool
HyperFlex Used to Fix Underwater Leak
A new SealGuard customer, a private university in South Carolina, recently used HyperFlex to fix a cracked and leaking concrete pond and fountain.
As the water feature was a half-acre in size, draining the pond was not an option. What had happened was that natural ground movement had ... Read More
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Fix Underwater Leak
