This easy to use selection chart can assist
in the selection of Grouts & Epoxies 
for specific project types.

How to Choose a Grout:

Selection of grouts used to seal cracks is based on some of the points below; however, much of the selection process is also based on user preference. A skilled technician with years of experience will likely have alot of insight as to which particular type of grout will bring about the desired results. It is often the case in commercial contracts that the injection contractor will submit a resquest to the contract administrator for product substitution to better achieve the goals of a particular project. 

• Required end product flexibility.
• Viscosity in relation to crack/joint width.
• Expansion required (adjustable with activators).
• Hydrophobic (incorporates little water into end product), or hydrophilic (incorporates a much higher amount of water into final product).

Flexibility:
Each urethane grout has its own characteristics. One of them is the resulting flexibility of the end product. Thought should be given to the amount of flexibility required if the crack or joint is active. The more active it is, the greater the flexibility required.
Here is a listing of the most flexible urethane grout to the least flexible:

                   MOST FLEXIBLE

• Leak-Proof FLEX-LV, Leak-Proof FLEX, AquaFLEX
• Leak-proof SEMI-FLEX
• Leak-Proof CUT

                  MORE RIGID

Viscosity:
Is an important factor in the products ability to flow. The lower the viscosity of a particular grout, the easier it will be to "push" it along in a tight crack or joint. Low viscosity means lower injection pressures and better travel.
Conversely, if the crack or joint is wider than, lets say the thichness of a credit card, the low viscosity product may run out of the crack or drop to the bottom of the crack before it can begin to react and foam. This may cause a poor injection. In selecting your grout for a particular project, you should give proper consideration to the viscosity of the product based for the width of the crack. You may temporarily close up the crack by jamming hydraulic cement or something else into it until the product completes the initial cure. We highly recommend performing an 5% acid flush and water flush prior to injection with any material. This will generally allow for better movement of material, better adhesion to the crack surface, and better product reaction. The epoxy resins will push water out of the crack ahead of itself and they are moisture insensitive.

Expansion:
Each product will expand to a different degree based on the amount of activator (required to be mixed with product) or accelerator (optional) used. You will get to know your expansion rates in differing field conditions with experience.

Also get to know the individual products and how they differ by reading the individual Product Data Sheets often. If you would like to request a particular product Please get to know the differing product by reading the various Product Data Sheets often. If there is a specific type of product you would like to suggest that we should make, please email us at sales@leak-proof.com and let us know.

PU Grout Selection Chart

Type of Application	Leak-Proof FLEX-LV 370cps Single Component Hydrophobic Grout Designed for tight to medium cracks.	Leak-Proof FLEX 600cps Single Component   Hydrophobic Grout Designed for medium to wide cracks.	Leak-Proof SEMI-FLEX 450 cps Two Component Hydrophobic	Leak-Proof CUT 450cps Two Component Hydrophobic	DISCONTINUED AquaLASTIC   (non-flamable) 100% solids Hydrophilic	DISCONTINUED AquaLASTIC-LV (flamable) 85% solids Hydrophilic	DISCONTINUED AquaLASTIC-MV (non-flamable) 83% solids Hydrophilic	AquaFLEX-SOIL Hydrophobic	Normal Set Time Low Viscocity Epoxy Resin	Slow Set Time Low Viscocity Epoxy Resin	Normal Set Time High Viscocity Epoxy Resin
Weeping Leaks in Foundations, Dams, Soffits & Structures	X	X	X	X	X	X	X
Gushing Leaks in Manholes, Dams, Tunnels (Seal will be in constant contact with water of moisture)		X Full Activator Dose	X Use Accelerator	X	X	X	X
Gushing Leaks in Manholes, Dams, Tunnels (Seal is expected to dry out for periods of time)		X Full Activator Dose	X Use Accelerator	X Use Accelerator
Leaking Expansion & Control Joints	X	X	X		X		X
Leaks in Rock Fracture, Seams and non-moving Cracks.		X	X	X	X	X	X
Soil Stabilization, & Gravel Layers								x
Grout Curtains				x				x
Large voids & seams in rock, honey comb		X		x
Structural Crack Repairs in Foundations, Structures, Piers, Abutments, Beams etc. Tight Cracks									x	x
Structural Crack Repairs in Foundations, Structures, Piers, Abutments, Beams etc. Wide Cracks											x
Floor Cracks, Gravity Feed									x	x