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Santex System

Technical Bulletin


Precision Epoxy Products
a division of : Rock Art, Ltd.
4279 Midway Drive
Douglasville, Georgia 30134
Phone : (770) 489-0340


    Product Description:  Santex is a sand filled epoxy system for use as a troweled industrial floor base, a troweled floor topping for leveling or sloping or as a concrete patch or repair mortar. Typical uses include such applications as concrete spall repair, drainage correction to fill 'Standing Water' low areas, ramping from a lower to a higher area, filler material, troweled cove base, etc. The system is made up of fine silica sand and larger coarse sand mixed at a ratio of 3 parts fine to 2 parts coarse (sand samples available). This mixture has several advantages and allows for easier troweling. Aggregate to epoxy ratios vary from generally 6 : 1 to 9 : 1 respectively depending on the application. Several epoxies can be used to achieve the desired solid state properties but whatever the choice; it should be a low viscosity epoxy system in order to wet the sand evenly and thoroughly. The choice of epoxy is determined on the characteristics required of the cured product to best suit the needs of the application from rigid to flexible or some point in between. The epoxy's open time and cure time are also factors to consider for proper selection.

For example: (A) IG-3 Epoxy will give an extremely rigid high strength product with a fast rate cure.
                     (B) SB-30 Epoxy will give a strong 25% elongation product with a moderate rate of cure.
                     (C) IG-100 Epoxy will give a moderately flexible product with a slow rate of cure.

Cured Santex Systems are available with a compressive strength from 800 psi to 17,500 psi and a tensile elongation from 3 % to 110 %. Cure times will allow for foot traffic from 2 hours to 72 hours. It should also be noted that the heat distortion factor of the product must be considered in certain applications. Selection of proper mixer and batch size is also important to consider for good results. 

For example:  6 cups of the mixed Parts 'A' and 'B' epoxy components at the systems mix ratio blended with 1.5 gallons of fine sand and 1 gallon of coarse sand creates a good workable batch that will cover 6.5 square feet at a depth of 1/2 inch.

Santex Systems require a primer and a sealer coat in order to be properly applied. A gallon of sand will have air as approximately 1/3 of its volume due to porosity. The liquid to aggregate ratio of the Santex System must maintain properties that allow it to be troweled and this means it will be porous. By troweling the Santex into a wet primer, the porosity of the system is eliminated on the bottom of the overlay. Primer epoxy selection can also be different than the Santex epoxy selection to allow for extended primer cure time and/or solid state property characteristics to allow for more control and better bonding. This is most useful in specialized applications.

For example: The need for a high strength rigid Santex overlay on concrete exposed to thermal shock creating  expansion and contraction considerations.

Santex Systems require a sealer coat to keep the overlay from having a porous finish. Depending on the version of the Santex System used, multiple sealer coats may be needed. There are very few applications where a porous Santex overlay would be desired; therefore the sealer coat application is the normal application technique. Sealer epoxy selection can also  differ from the Santex epoxy selection to suit the requirements of the application.

For example: The use of Santex System to ramp a step from one room in a shop to another room in order to be able to roll wheeled carts, engine hoist, tool boxes, etc. between the two rooms. The TC-200 epoxy can be used as the sealer epoxy to match the overall floor system.

Colored sand or quartz aggregates can be used with a clear sealer epoxy such as the FS-190 epoxy to create a more decorative use in special applications for the Santex System.

    Product Directions:  A clean, dry, solid surface is essential to apply the Santex System onto for permanent results. Due to the various applications possible, consult with Precision Epoxy for proper substrate preparation for your particular project.

Primer: The Santex mix must always be applied into a WET primer. This means a wet primer. If the concrete is overly absorbent where the primer soaks in leaving a dry look or feel prior to applying Santex - - Re-Prime; If the primer is applied too far ahead of the trowel mechanic applying the Santex and tacks out before the Santex is applied - - Re-Prime. It is important to prime solid, for example; in a spall repair application where the surface has been chipped away of flaking concrete to a solid surface that is very uneven, then apply the primer with a thick 3/4 to 1 inch nap roller cover to coat evenly and properly.

Santex: Select the type of epoxy binder to suit the project requirements. Mix Parts 'A' and 'B' of the selected Epoxy System at the proper mix ratio for 2 to 4 minutes depending on batch size. Then add fine/course sand blend and mix until sand is completely wet and saturated with epoxy (2 to 4 additional minutes). Scrape sides and bottom of mixing container while mixing to avoid having any dry sand in the batch. Dump blended Santex mix into wet primer on the prepared area and trowel to desired shape and/or thickness. Santex is allowed to cure overnight.

Sealer: Select the type of epoxy to seal the cured Santex to achieve the proper surface strength and finish to suit your application and to eliminate any porosity. In most applications the sealer will need to be applied in 2 coats.

    Pricing:  Santex pricing is determined by square footage and material depth. It is very difficult to estimate because you are generally dealing with cubic volume on an uneven surface. This situation is next to impossible to measure with any degree of accuracy; if you cannot estimate, you simple have to guesstimate. 

Coverage example: One batch at 6.7 to 1 ratio of aggregate to epoxy respectively would use 2.5 gallons (33 lbs) of sand blend and 48 fluid ounces (6 cups) of epoxy. This batch covers 13 square feet at 1/4 inch thick which equals 34.5 square feet per gallon of epoxy and 39.5 square feet per 100 lbs of sand blend. Epoxy to aggregate ratios can vary to suit the needs of the application and/or the epoxy binder selection.

See Slurry Coat for additional information.

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Precision Epoxy Products
4279 Midway Drive
Douglasville, Georgia 30134
Mike Ramy
(770) 489-0340

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