O'Brill Company

Construction Specialty Suppliers

       6626 N. Milwaukee Ave.

Niles, IL 60714

773-775-1122 or 847-647-0005

FAX 847-647-7819

Since 1967

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Sealtight Meadow-Crete FNP




NO. 379



One component, flowable, shrinkage-compensated, corrosion inhibitor enhanced, repair mortar for structural applications. MEADOW-CRETE FNP can be formed and poured or formed and pumped, utilizing a suitable grout pump.

The product is ideal for the reinstatement or repair of beams, columns, balcony edges or for partial depth or full depth placement. MEADOW-CRETE FNP is suitable for industrial, residential and civil engineering applications.


bulletMigrating Corrosion Inhibitor Enhanced / Protects Localized and Adjacent Reinforcing Steel
bulletVery Flowable / Can be Poured or Pumped
bulletMay be Extended / Lower in Cost Placement
bulletLow Permeability / Protects Embedded Reinforcing Steel
bulletShrinkage Compensated / Added Dynamic Stability
bulletHighly Engineered / Non-segregating / Re-dispersible

50 LB. (22.7 kg) bag
Yield: 0.39 Cu. Ft.

Yields listed above are based on 3.50 quarts (3.31 liters) of water per 50 lb. (22.7 kg.) bag and will vary based on substrate profile, aggregate, variations in mix water amounts and waste/rebound. Field trials should be performed to determine yields based on job-site conditions.

12 months when stored on pallets in a dry, cool area

The following physical properties were determined using the maximum liquid (SEALTIGHT ACRY-LOK) to powder ratio of 1-gallon (3.78L) per 50 lb. bag at 75F (23.5C)

Set Time Per ASTM C 191
Initial 4 hours
Final 6 hours
Working Time 30 mins.
Flow Per ASTM C 191 Flowable
Compressive Strength
Per ASTM C 109
at 1 day 2,250 PSI (15.5MPa)
at 7 days 7,500 PSI (52 MPa)
at 28 days 8,000 PSI (55 MPa)
Bond Strength Per ASTM C 882
@ 1 day 650 psi (4.5MPa)
@ 28 days 3400 psi (27 MPa)
Modulus of Elasticity
Per ASTM C 469
4.13 x 106 psi (28.5 GPa)
Length Change Per ASTM C 157
Drying Shrinkage @28 days -0.040% (400 strain)
Length Change Per ASTM C 157 (Modified)
Specimens stored at 73+/-3 F & 50+/- 4% RH, continuously
Drying Shrinkage @28 days -0.091% (910 strain)
Flexural Strength Per ASTM 348
@ 1 day 650 psi (4.5 Mpa) 
@ 28 days 1,850 psi (13 Mpa)
Freeze-Thaw Resistance Per ASTM C 666 (Procedure A)
At 300 Cycles 97% RDM

All Technical Data is typical information, but may vary due to testing methods, conditions and procedures.
Independent Reports Are Available Upon Request.
Modified No Bonding Agent used. Pre-dampening of properly prepared substrate.
RDM - Relative Dynamic Modulus


bulletMEADOW-PATCH FNP is recommended for concrete repairs only.
bulletDo not use as an underlayment or overlay.
bulletDo not apply below 40F (4C) or above 90F (32C) or when rain is imminent.
bulletProtect from freezing for a minimum of 24 hours.
bulletDo not bridge moving cracks. Extend existing control and expansion joints through MEADOW-PATCH FNP.
bulletFor large areas with no control, expansion or construction joints, refer to ACI guidelines.
bulletDo not add any admixtures.
bulletExceeding liquid requirements shall result in reduced physical properties.
bulletRealize that set time will decrease as the product, air, substrate and mixing liquid temperature increases and will be increased as the temperature decreases.
bulletRepair areas should be saw cut and slightly undercut to a minimum depth of a 1/2" (12 mm). Do not featheredge.
bulletProtect from conditions that may cause early water loss; windy, low humidity, high temperature and direct sunlight. Early water loss is exasperated in thin applications.
bulletRealize that the use of extender aggregate will alter physical properties.
bulletFailure to follow industry standard practices may result in decreased material performance.
bulletProper application is the responsibility of the user. Field visits by W.R. MEADOWS personnel are for the purpose of making technical recommendations only, and are not to supervise or provide quality control on the job-site.

Perform surface preparation in accordance with ICRI Technical Guidelines No. 03730. Mechanically abrade existing substrate to remove all unsound concrete, but do not use excessive force, which may cause micro-fracturing. Substrate must be structurally sound and free of any contaminants that will adversely affect bond. Prepared surface must be dust-free and have a sufficient profile to ensure adequate mechanical lock. Saw cut perimeter of repair zone to a depth of " to avoid featheredging.

Completely expose all reinforcing steel, ensuring a minimum clearance of " behind reinforcing steel. Perform reinforcing steel preparation in accordance with ICRI Technical Guidelines No. 03730.

Pre-soak repair zone prior to application of MEADOW-CRETE FNP to a saturated, surface dry (SSD) condition and free of standing water.

Mix only complete bags. Using a mortar type mixer, pour 3.00 quarts (2.84 liters) per 50 lb. (22.7 kg) bag. Slowly add MEADOW-CRETE FNP while mixing. Adjust mix consistency using up to an additional 0.25 Quarts (0.24 L) of water. Mix for 3-5 minutes or until homogenous and lump-free. Do not over mix.

Support formwork as to ensure a tight seal with repair zone. Formwork should be rigid, structurally stable, sealed and coated with a suitable release agent (such as SEALTIGHT DUOGARD). Forming should be accomplished in accordance with ACI 347-88. Proper vent & drainage ports should be installed as required to ensure no entrap of air voids. Pre-soak repair zone for 24 hrs. prior to placement to a saturated, surface dry (SSD) condition.

Pour or pump properly mixed product immediately following proper mixing to ensure adequate flow. Pumping should be accomplished in accordance with ACI 304-R-85. Do not re-temper or over-work product. Follow ACI 305-R89 "Standard on Hot Weather Concreting" or ACI 306-R88 "Standard on Cold Weather Concreting," when applicable.

Cure in accordance with ACI 308. Cure MEADOW-CRETE FNP immediately following removal of forms using a suitable water-based curing compound such as SEALTIGHT 2250-WHITE or SEALTIGHT 1130-CLEAR.

Avoid inhalation of dust. Avoid direct contact with this product. Utilize gloves and safety glasses to minimize direct contact. If contact occurs, wash affected areas with mild soap and water. Keep product out of reach of children. For industrial use only. Refer to Material Safety Data Sheet for complete Health and Safety Information.

This material last updated November, 2001.

W. R. MEADOWS, INC. warrants that, at the time and place we make shipment, our materials will be of good quality and will conform with our published specifications in force on the date of acceptance of the order. THE FOREGOING WARRANTY SHALL BE EXCLUSIVE AND IN LIEU OF ANY OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ALL OTHER WARRANTIES OTHERWISE ARISING BY OPERATION OF LAW, COURSE OF DEALING, CUSTOM OF TRADE OR OTHERWISE. As the exclusive remedy for breach of this Warranty, we will replace defective materials, provided, however, that the buyer examine the materials when received and promptly notify us in writing of any defect before the materials are used or incorporated into a structure. Three (3) months after W. R. MEADOWS, INC. has shipped the materials, all our Warranty and other duties with respect to the quality of the materials delivered shall conclusively be presumed to have been satisfied, all liability therefore terminates, and no action for breach of any such duties may thereafter be commenced. W. R. MEADOWS, INC. shall in no event be liable for consequential damages. Unless otherwise agreed to in writing, no warranty is made with respect to materials not manufactured by W. R. MEADOWS, INC. We cannot warranty or in any way guarantee any particular method of use or application of the performance of materials under any particular condition. Neither this Warranty nor our liability may be extended or amended by our salesmen, distributors or representatives, or by our distributor's representatives, or by any sales information or drawings.


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Copyright 2002 O'Brill Company
Last modified: August 09, 2004