Alchatek Blog

Leak Seal & Geotech Products & Procedures

March 14 & 15, 2019 at Alchemy-Spetec HQ in Tucker, GA

Get ready for a thorough education in Leak Seal, Slab Lifting, Soil Stabilization and the Alchemy-Spetec Deep Lift™ process. You’ll get hands-on training from a technical staff with decades of on-the-job experience.

Thursday - Leak Seal

• Leak Seal Product Line Overview
• Curtain Grouting
• Permeation Grouting
• Leak-Seal Product Mixing
• Pump & Packer Overviews
• Leak-Seal Accessories
• Municipal Applications
• Live Injection Demos
• Open Discussions

Friday - Geotech

• Geotech Product Line Overview
• Soil Stabilization
• Geotech Product Mixing
• Rig & Mobile System Overviews
• Geotechnical Accessories
• Slab Lifting Live Demo
• Deep Lift™ Overview
• Soil Testing with the
• GPR & Penetrometer
• Maintenance Discussions
• Pricing / Estimating / Cost Savings
• Open Discussions

Participants receive a Samsung tablet loaded with training material.

Your Instructors:

Stephen C. Barton (President/CEO), Jim Spiegel (VP Sales & Business Development), Andy Powell (Southeastern Regional Manager), Anthony Sandone (Eastern Regional Manager), and Charlie Lerman (Western Regional Manager). Each instructor is a seasoned professional with at least a decade of experience in the industry.  

Alchemy-Spetec products will now officially be promoted under the Leak Seal and Geotech lines.  As holds true with most mergers (Alchemy Polymers and Spetec formed Alchemy-Spetec in 2017), the integration of products and services can take time.  This rebrand will be reflected in two separate product catalogs.  One for Leak Seal products and one for Geotech products. We are confident that the two-catalog offering is the best solution for our partners and customers. 

Both product types are now easily discernible by the Spetec or AP nomenclature in which Spetec represents Leak Seal, and AP represents Geotech. 

The Geotech line encompasses all two-part rigid polyurethanes used for void filling, slab lifting, permeation grouting, and soil stabilization; as well as acrylic grout used for permeation grouting, and all associated pumping equipment and accessories. Due to the technical support requirements of geotechnical applications in terms of equipment use, accessory setup, and application technique, this line will remain a direct sale to contractors performing slab lifting and soil modification applications.  

Conversely, the Leak Seal line remains a distributor sale through our continued support of distribution partners.  The Leak Seal line encompasses all water-activated grouts, acrylic grouts, waterstop products, mechanical packers and ports, and all associated dispensing equipment.   Since structural repair products are also sold through distribution, they are included in the Leak Seal catalog.

If you have any questions about the Alchemy-Spetec Leak Seal or Geotech product lines, please contact Jim Spiegel at jspiegel@alchemy-spetec.com for further assistance. 

Want more info on Alchemy-Spetec Leak Seal products?

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To backer rod or not to backer rod?  That is the question.

Alchemy-Spetec has stepped into the world of industrial floor repair.  For years we have developed products for lifting and stabilizing concrete slabs.  Now we have taken the next step and developed a couple of products for repairing and protecting the edges of the interior concrete joints.  This latest development has re-opened discussions I used to have on a regular basis about joint sealer, joint fillers, and the use of backer rod.

Let me cut to the chase.  There is a big difference between a joint sealant and a joint filler.  Joint sealants are mostly for exterior applications.  The purpose is to prevent water from entering the joints and eroding the soil beneath the slab (call me if that happens, I have the best solution for rocking slabs).  Joint fillers, on the other hand, are typically used indoors and their purpose is to protect the edges of the concrete joints from chipping and spalling.

In order for a concrete Joint Sealant to work, it has to be flexible and adhere tenaciously to the concrete.  These materials are typically silicone, polyurethane, or polysulfide based caulks.  The cured material should end up in an hour glass shape (picture an hour glass laying on its side).  This allows the material to deform and stretch in the thin part of the hour glass.  The hour glass shape is formed by installing a round backer rod pushed down in the joint so that the top of the backer rod is at a depth that is half the width of the joint.  The material is installed into the joint and then tooled so the top forms the shape of the hourglass.   

Joint Fillers, on the other hand, have a different purpose and different method of installation.  These materials are typically epoxy, polyurea, or a polyurea hybrid.  You should NEVER use a backer rod at a depth of less than two inches when using joint filler.  If you do, it will result in the material failing.  You can use a maximum of ¼” of dry silica sand at the bottom of the saw cut to help prevent the liquid material from flowing into the crack below the saw cut.  Faster set materials (polyurea hybrids) also help prevent leakage into the crack. 

Joint fillers are designed as a structural component.  They absorb the impact of hard-wheeled traffic (forklifts and pallet jacks).  They protect the joint edges.  To work properly, they should be installed to the full depth of the control joint saw cut or at least the top 2 inches of a construction joint. 

Yes, using backer rod can save you money on installation cost, but it will bite you in your hind quarters eventually.  Joint fillers do not stretch.  They are designed with low adhesive strength (aka bond strength) and low cohesive strength (aka tensile strength) so that they won’t weld the concrete together.  Saw-cut joints (aka control joints) are there for a purpose – to allow for thermal expansion and contraction of the concrete.  Joint fillers are designed to de-bond or crack if the concrete moves too much. This is not a failure of the material, but rather a built-in safety mechanism.  

If you install a joint filler properly (full depth), it will rest on the shoulders at the bottom of the saw cut and will not push down into the joint (unless you ignore my advice and use backer rod).  It will absorb the impact of hard wheel traffic and protect the joint edges.  We chose to develop a polyurea hybrid material that cures in seconds.  You can overfill the joint slightly, then shave off the top flush with the concrete in a matter of minutes.  Powerful, painless, rapid.

Quick Reference:

Joint Sealer:  Exterior use, high flexibility, installed in hourglass shape using backer rod, and prevents water intrusion beneath a concrete slab.

Joint Filler:  Interior use, low flexibility, installed full depth (normally don’t use backer rod), and protects the edges of the concrete joints from chipping and spalling.

Joint Filler Product:  AP Joint Fill 800.  Available in 10 gallon units or 22 ounce dual cartridges.

Want more information on Alchemy-Spetec floor repair products?