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On Demand

Waterproofing Concrete: Crack Injection

Product Demonstrations
Charlie Lerman
24 Minutes
Audio and Video
Access for 6 month(s) after purchase.


As long as there is concrete there will be concrete cracks. There is no shortage of repair methods for cracked concrete but the challenge is to find the right one that meets your specific needs. This product demonstration will cover polyurethane injection for leak mitigation. The area of focus will be understanding why concrete cracks, when to use polyurethane or epoxy injection, safety and equipment required for injection work, and lastly, the injection process itself.


  1. Understanding why concrete cracks
  2. Polyurethane vs epoxy injection
  3. Safety and equipment required
  4. The injection process

Company overview:

The Alchemy-Spetec Leak Seal Division consists of waterproofing injection polymer chemical grouts and  associated equipment with the most experienced technical team in the industry. Our Geotech Division offers industry-leading quality chemical grouts for lifting/soil stabilization as well as rig training, unmatched contractor support in the field, and sales and marketing support.


Charlie Lerman's Profile

Charlie Lerman Related Seminars and Products

Director of Technical Services Leak Seal


Prior to joining the Alchemy-Spetec team, Charlie Lerman was with the Navy in the submarine and recruiting services. He has 20 years of construction experience and was with a restoration contractor for five of the twenty years. He earned his bachelor's degree in Business Management during that time. Charlie has been providing technical support and training for polyurethane grouts for over fifteen years and has been involved with the International Concrete Repair Institute (ICRI).  Currently, Charlie is the Director of Technical Services at Alchemy-Spetec. He has been involved in a wide variety of grouting jobs from dams to tunneling, municipal to sewer system work, residential, commercial, and industrial.