Data Sheets

Data Sheets


  • Compressive strength (ASTM C-109):
  • @ 24 hours4,300 psi (302.3 kg/cm2)
  • @ 7 days5,750 psi (404.3 kg/cm2)
  • @ 14 days5,900 psi (414.8 kg/cm2)
  • @ 28 days6,500 psi (457.2 kg/cm2)
  • Density (ASTM C-20)135 pcf (2.16 gm/cm3)
  • Flexural strength (ASTM C-580)1,285 psi (90.3 kg/cm2)
  • Freeze-thaw resistance (ASTM C-666, 100 cycles)Excellent
  • Mix ratio6.25 to 1, by weight
  • Shear bond strength (ASTM C-882-91):
  • @ 7 days2,200 psi (154.9 kg/cm2
  • @28 day2,540 psi (178.8 kg/cm2
  • Shrinkage (ASTM C-596, at 90% RH)0%
  • Tensile strength (ASTM C-307)629 psi (44.2 kg/cm2)

Physical properties were determined on specimens prepared under laboratory conditions using applicable ASTM procedures. Actual field conditions may vary and yield different results; therefore, data IS subject to reasonable deviation.

RestoKrete® SubstrateResurfacer F-121FBR by Sauereisen is a Fiber- Reinforced substrate repair material. It also serves as a waterproofing barrier for prevention of inflow and infiltration in concrete or brick manholes.

F-121FBR SubstrateResurfacer is Portland cement-based and primarily specified for municipal wastewater environments where structural integrity needs to be restored. The existence of fibers within the formulation enables greater compressive strength compared to standard resurfacing materials.


  • Pumpable and sprayable.
  • Economical.
  • Moisture tolerant.
  • Applied by spincast/spray.
  • Safe to use, non-toxic.
  • Trowelable.


Temperature of Working Area
Maintain a temperature of 65°-80°F on air, Liquid, and Hardener components during mixing, application and cure. The substrate should be maintained at 50°F to 80°F for 48 hours prior to beginning work.

At temperatures below 50°F, the application becomes more difficult and curing is retarded.

Above 85°F, the material working time decreases. It is recommended that the material components be stored in a cooler area prior to mixing.

Surface Preparation
Surfaces should be made free of oil, grease, water, and other contaminants that may inhibit bond.

Concrete must be firm and structurally sound as specified by the architect/engineer.

Hydroblasting should be utilized to remove laitance, contaminants, or loose particles and to produce a clean hard surface. All standing surface water should be removed prior to applying RestoKrete™ SubstrateResurfacer F-121 Fiber Reinforced material.

To ensure maximum adhesion and to prevent dehydration of F-121FBR at the substrate interface, the concrete should be thoroughly dampened with water prior to application. If concrete cannot be dampened or an unusual stress condition exists, a concrete bonding agent is recommended. Consult Sauereisen for recommendations.


Mixing should be done mechanically with a slow-speed mortar mixer or drill motor with a "Jiffy" type mixing blade to obtain a uniform consistency. The mixing equipment must be clean and free of contaminants.

Sauereisen recommends that powder and water ratios are accurately weighed prior to mixing. For every 50 lb. bag of powder, the appropriate amount of water is 8 lbs. If water must be measured in the field by volume, the approximate amount per 50 lb. bag of powder is in the range of 0.962 gallons or 7.7 pints (124 ounces). The approximate mixing time for this mixture is 5 minutes.

Mix only as much RestoKrete® SubstrateResurfacer F-121FBR material that can be applied in 15-20 minutes. Do not retemper by adding more water and remixing. Material that has hardened due to delay in placing must be discarded.

When using a lightweight mobile rotor-stator pump, apply a uniform coat to a minimum thickness of 1/8 inch. The following equipment is typical for rotary-sprayed applications of substrate resurfacing materials:

Rotor/Stator Pump outfitted with an appropriate spincaster nozzle with internal air motor for rotary spray applications. For straight shot applications, use a pole gun with aluminum spray head.

Moisture Separator for collecting condensation within air lines.

Material Hose of 1-1/4 to 1-1/2 inch diameter and 15-feet length with internal expanded male ends and cam locks, with capacity of 300 psi required.

Air Hose of ½-inch diameter and 50 feet length from compressor to wet spray nozzle. Specify 200 psi and 2 lug Chicago fittings.

Air Hose of ½-inch diameter and 15 feet length from Moisture Separator to Spinning Nozzle Assembly. Specify 200
psi capacity with one end Chicago fitting and one end brass female swivel.

Cam-Lock Couplings of 1-inch and ¾- inch diameter (2 sets each).

Miscellaneous Parts
• 3/16 inch hardened steel tip
• Tip retainer nut
• Pole gun assembly

Other Outside Source Equipment
• 180 cfm Air Compressor
• 5500 watt Generator with 220 volt single-phase


If Sauereisen RestoKrete® F-121FBR is applied by trowel, finishing after material placement is recommended. In this case, apply a broom or brush finish to provide a more desirable bonding surface.

Such a surface texture is desired for spincast applications as well. Finish in a similar manner, if necessary. Take care not to disrupt the sprayed thickness.


When mixed at the proper ratio of powder and water, a bag of F-121FBR will yield the following:
0.423 ft3 per bag.
40 ft2  per bag at 1/8-inch thickness.
20 ft2 per bag at ¼-inch thickness.


All equipment should be cleaned by scrubbing with a stiff brush and water at the end of each working period or when build-up becomes pronounced.


Proper curing of F-121FBR is critical to the serviceability of the completed structure. F-121FBR has an initial set at 70°F in 8 hours. Do not topcoat within the first 8 hours of curing.

Final set of F-121FBR occurs in 24 hours at 70°F. All topcoating should be completed within 24 hours.


RestoKrete™ SubstrateResurfacer F-121FBR is packaged in 50-pound moisture- resistant bags on plastic-wrapped pallets.


Sauereisen F-121FBR has a shelf life of six (6) months when stored unopened in a dry location at 70°F. Avoid freezing. If there is a doubt as to the quality of the materials, consult a Sauereisen representative.


Consult Safety Data Sheets and container label Caution Statements for hazards in handling these materials.


Sauereisen, SewerGard®, ConoCrete™, RestoKrete®, ConoGlaze™, and FibreCrete™ are all products or services denoted with ™ or ®. These trademarks or registered trademarks of Sauereisen, Inc. Sauereisen trademarks may not be used in conjunction with any product or service that is not a Sauereisen product or service.


We warrant that our goods will conform to the description contained in the order, and that we have good title to all goods sold. WE GIVE NO WARRANTY, WHETHER OF MERCHANTABILITY, FITNESS FOR PURPOSE OR OTHERWISE, EXPRESS OR IMPLIED, OTHER THAN AS EXPRESSLY SET FORTH HEREIN. We are glad to offer suggestions or to refer you to customers using Sauereisen cements and compounds for a similar application. Users shall determine the suitability of the product for intended application before using, and users assume all risk and liability whatsoever in connection therewith regardless of any suggestions as to application or construction. In no event shall we be liable hereunder or otherwise for incidental or consequential damages. Our liability and your exclusive remedy hereunder or otherwise, in law or in equity, shall be expressly limited to our replacement of nonconforming goods at our factory or, at our sole option, to repayment of the purchase price of nonconforming goods.

• Distributors and agents in major cities throughout the world. Consult manufacturer for locations.
• Information concerning government safety regulations available upon request.
• Sauereisen also produces inorganic compounds for assembling, sealing, electrically insulating and grouting