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 H2




NO. 383



SEALTIGHT MEADOW-CRETE H2 is a two-component, trowel applied, corrosion inhibitor enhanced, polymer modified, shrinkage-compensated, cementitious repair mortar for horizontal applications.

SEALTIGHT MEADOW-CRETE H2 is designed for horizontal repairs and resurfacing of concrete, both small and large areas, interior and exterior applications, a minimum of 1/4" deep. MEADOW-CRETE H2 is suitable for industrial and civil engineering applications.

Features / Benefits

bulletPolymer Modified / Enhanced Bond
bulletLow Permeability / Protects Embedded Reinforcing Steel
bulletShrinkage Compensated / Added Dynamic Stability
bulletGood Abrasion Resistance / Increased Wear Resistance for Longevity
bulletCreamy Consistency / Easily Finished
bulletExcellent Freeze-Thaw Resistance / Long Term Stability
bulletPackaged as a Unit / Minimizes Job-Site Mixing Variations
bulletMigrating Corrosion Inhibitor Enhanced / Protects Localized and Adjacent Reinforcing Steel

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 2.5 hours
Final 4 hours
Working Time 30 mins.
Flow Per ASTM C 191 112%
Compressive Strength
Per ASTM C 109
at 1 day 3,500 PSI (24MPa)
at 7 days 6,700 PSI (46 MPa)
at 28 days 7,750 PSI (53.5 MPa)
Bond Strength Per ASTM C 882
@ 1 day 725 psi (5 MPa)
@ 28 days 1850 psi (13 MPa)
Modulus of Elasticity
Per ASTM C 469
2.18 x 106 psi (15.0 GPa)
Length Change Per ASTM C 157
Drying Shrinkage @28 days -0.077% (770 strain)
Length Change Per ASTM C 157 (Modified)
Specimens stored at 73+/-3 F & 50+/- 4% RH, continuously
Drying Shrinkage @28 days -0.1230% (1230 strain)
Flexural Strength Per ASTM 348
@ 1 day 600 psi (4 Mpa) 
@ 28 days 1,600 psi (11 Mpa)
Freeze-Thaw Resistance Per ASTM C 666 (Procedure A)
At 300 Cycles 92% 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


bullet55lb. (25 kg) bag yields: 0.48 Cu. Ft.
bulletExtended with 12.5 lbs. (5.68 kg) of aggregate yields 0.56 Cu. Ft.
bulletExtended with 25 lbs. (11.36 kg) of aggregate yields 0.64 Cu. Ft

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


bulletMEADOW-CRETE H2 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-CRETE H2.
bulletFor large areas with no control, expansion or construction joints, refer to ACI guidelines.
bulletDo not exceed a length-to-width ratio of 2 to 1 for the repair area.
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 1/4" (6 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 sufficient profile to ensure adequate mechanical lock. Saw cut perimeter of repair zone to a depth of 1/4" to avoid featheredging.

Completely expose all reinforcing steel, ensuring a minimum clearance of 3/4" behind reinforcing steel. Perform reinforcing steel preparation in accordance with ICRI Technical Guidelines No. 03730.

Pre-soak repair zone, prior to application of slurry coat to a saturated, surface dry (SSD) condition and free of standing water. Prime (SSD) substrate with a slurry coat (2 parts MEADOW-CRETE H2 powder to 1 part SEALTIGHT ACRY-LOK). Allow slurry coat to become tacky prior to application of MEADOW-CRETE H2. Do not allow slurry coat to become tack-free.

Mix only complete bags. Using a mortar-type mixer, pour 3/4 of the 1-gallon container of ACRY-LOK into the mixer. Slowly add MEADOW-CRETE H2 while mixing. Mix for 3-5 minutes or until homogeneous and lump-free. Adjust mix consistency using the remaining 1/4 of container of ACRY-LOK. If extending, follow additional instructions below. For small repairs, mix in a clean vessel, using a variable-speed drill with a mixing paddle designed for mixing mortars (not liquids) at 400-600 rpm. Do not over-mix.

Applications greater than 2" must be extended with 12.5 lbs. (5.68 kg) of 3/8" washed, dried pea gravel. Applications greater than 4" must be extended with 25 lbs. (11.36 kg) of 3/8" washed, dried pea gravel. The extender aggregate must be added to the mixer prior to the addition of MEADOW-CRETE H2.

Compact MEADOW-CRETE H2 into properly prepared SSD substrate prior to bulk placement. Finish surface with a wood or steel trowel or sponge float. MEADOW-CRETE H2 may be applied horizontally up to 4" and beyond, depending on percent of extension used. 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 H2 immediately following application using a suitable water-based curing compound such as SEALTIGHT 2250-WHITE or SEALTIGHT 1130-CLEAR. (Do not use solvent-based curing compounds). W.R. MEADOWS recommends the use of SEALTIGHT EVAPRE, an evaporation retarder, when conditions exist for rapid early water loss.

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. Refer to Product 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