Slurry Coat is an
aggregate filled epoxy system for use as a troweled or squeegee applied industrial floor
repair system to fill, even-up or level spalling, pitted or uneven substrate
surfaces. The idea of a slurry coat is to apply a self leveling epoxy with a
sand filler over an uneven surface to make it smooth or flat again. The epoxy
mix has a fine to medium course sand added at a general ratio of between 2 parts epoxy to
1 part sand and 1 parts epoxy to
1 part sand to create a soupy flowing mixture that is applied to the surface by
scraping the slurry coat mixture with a wide blade across an uneven substrate wiping
clean high spots and allowing mixture to fill low spots. The sand will settle
into low areas and epoxy will self level on top. The sand filler takes up volume
and reduces the amount of epoxy needed making the Slurry Coat more cost
effective than filling with only epoxy. 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. Specialized applications will allow for different
size aggregates added at various ratios that maintain a soupy flowing mixture to
meet application and cured product requirements.
Cured Slurry Coat 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
A clean, dry, solid
surface is essential to apply the Slurry Coat System onto for permanent results. Due
to the various applications possible, consult with Precision Epoxy for proper
substrate preparation for your particular project.
The Slurry Coat is a self priming system in most applications. In some
installations a primer may be used when the substrate has a porous profile. In
this situation the slurry coat may produce air migration as it penetrates
the substrate creating surface bubbles that may not release. A primer will seal
the substrate and eliminate porosity. Surface bubbles in the slurry coat can be
torched to release or you can broadcast dry aggregate onto surface to eliminate
When using a primer, do not add a solvent to the primer for any reason. The
solvent will not be able to release through the slurry coat and may affect the
product's final solid state properties.
Slurry Coat: 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 aggregate and mix until sand is completely wet
and saturated with epoxy (2 to 4 additional minutes). Epoxy to aggregate ratios
can vary to suit the needs of the application and/or the epoxy binder selection.
Scrape sides and bottom of
mixing container while mixing to avoid having any dry sand in the batch. Dump
blended Slurry mix on to the prepared area and pull across substrate with trowel
or squeegee using a side to side motion to the desired thickness. Once mixture
is poured onto surface, it should be spread quickly before the filler has a
chance to settle. Slurry Coat is allowed to cure overnight.
Sealer: Select the type of
epoxy to seal the cured Slurry Coat to achieve the proper surface strength and finish
to suit your application and to eliminate any porosity. In applications where the
Slurry Coat is used for substrate preparation as part of a total floor system
application, the next step in that floor system would now be applied.
Slurry Coat 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 hard to measure with any degree
of accuracy; if you cannot estimate, you simple have to guesstimate.
One batch at
2 to 1 ratio of epoxy to aggregate respectively would use 1.5 gallons of
epoxy mix to .75 gallon of sand (9.75 lbs). This batch covers 30 square
feet at 1/8 inch thick which equals 20 square feet per gallon of epoxy and 155 square feet per
50 lbs bag of sand. Epoxy to aggregate ratios can vary to suit the needs of the
application and/or the epoxy binder selection.