Sealant for Underwater Application

[jpoha]

I have a situation where a galvanized steel plate was bolted to existing concrete. The steel plate is part of a stop log system on a dam sluiceway. Water is leaking between the steel and concrete in one location. The flow coming through the gap is rather high. The gap is at the bottom of the structure, which has about 12 ft. of hydrostatic head on it.

I need a sealant that can be applied from the downstream (dry) side of the gap to the upstream side to create a watertight seal, without lowering the water level behind the stop logs.

Does anyone know of such a product and application procedure?

 

[unclesyd]

Just a thought. I would see if I could slow the leak down say with something like lead wool and then use a material like the Sauereisen 370 or 180. Also there are other grouts use for repair of leaks in tunnels that may work.

http://www.santarosalead.com/lead_ingots_wool_waterproofing.htm

http://www.sauereisen.com/pdf/f_370.pdf

http://www.sauereisen.com/pdf/f_180.pdf

 

[LittleWheels]

Talk to a good polymer specialist, MC Baucheme for one. You could use a foaming hydrophobic polyurethane as an initial leak stop and get long-term sealing with a follow-up injection of a hydrophilic polymer.

I assume you are in North America but don't know the material supplier/applicator situation there.

 

[jpoha]

Thanks unclesyd and DaveMinter. I will try those ideas.