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 Acry-Lok




NO. 351-PD



SEALTIGHT ACRY-LOK is a high solids, acrylic polymer latex bonding agent and admixture. This milky white liquid is non-yellowing in Portland Cement compositions. When used as an admixture, ACRY-LOK provides better crack resistance, flexural strength, and freeze / thaw tolerance. Permeability is reduced, allowing more protection from chloride intrusion.

As a bonding agent, ACRY-LOK enhances the bond between existing concrete and placement of a fresh repair. It will not re-emulsify.

Since ACRY-LOK will not re-emulsify, concrete repairs / mortars fortified with ACRY-LOK are ideal for interior, exterior and moisture related applications. Typical areas that would benefit from properties of this product include toppings, mortars, grouts, vertical, horizontal and overhead patching. Use ACRY-LOK neat as a bonding agent or as an additive in scrub coats prior to repairs or overlays.

Meets ASTM C 1059-91, Type II, (Non-Re-emulsifiable)

1 gallon (3.79 L) Unit
5 gallon (18.93 L) Pails
55 gallon (208.20 L) Drums
Cartons: (4) 1 Gallon Units

One year in unopened containers, stored at 50°F to 85°F.


bulletSignificantly improves adhesion / Longer lasting repairs
bulletIncreases flexural strength / Better durability
bulletNon-Re-emulsifiable / Superior performance in a wet environment
bulletLowers permeability / Denser, more chemically resistant repairs
bulletGreater resistance to freeze-thaw / Better repair cycling performance
bulletMulti-purpose applications / Easy to use
bulletIncreases abrasion resistance / Strong, permanent repairs
bulletNon-yellowing / Aesthetically appealing


bulletDesigned for professional contractors, industrial use only
bulletDo not allow to freeze, properly dispose of any material that has been frozen
bulletDo not apply ACRY-LOK when temperature is expected to be below 40°F (4°C) within 48 hours or when rain is imminent.
bulletAvoid over-mixing and over-working the surface
bulletDo not use with air entrained cement
bulletDo not use with solvent-based curing compounds

Avoid direct contact with this product. Use of safety glasses, rubber gloves and protective clothing is recommended. 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.

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 grease, oil, dirt or any other contaminants that can adversely affect the bond. Prepared surface must be dust-free and have sufficient profile to ensure adequate mechanical lock. Substrate must be saturated, surface dry (SSD) and free of standing water.


Typically, blend one part cement to three parts sand then add enough ACRY-LOK until a desired consistency is achieved. To avoid trapping air, do not over mix. Place modified mortar / repair material and finish appropriately, careful not to overwork the material. Once the finishing process is completed, immediately cure work zone with undiluted ACRY-LOK or one of several MEADOWS’ water-base curing compounds. Do not use solvent-base curing compounds.

Mix one-part cement to two parts sand, then add enough undiluted ACRY-LOK to make a slurry consistency. Work slurry into the repair area with a stiff masonry brush, coating the entire area, paying special attention to the corners, sides and any exposed rebar. Place modified mortar / repair material prior to ACRY-LOK becoming tack-free.

Apply ACRY-LOK undiluted by brush, roller or garden type sprayer on prepared surface. Place modified patching/repair material before prepared ACRY-LOK surface dries.

Mix designs vary with specific job requirements. Proportioning of sand, cement and ACRY-LOK (Diluted or neat) ratios achieve different physical properties. The application instructions highlight typical conditions. (When in doubt, always apply a test patch).


bulletMEADOW-PATCH T1: One-component, Horizontal, Overhead and Vertical, Thin Patching Compound
bulletMEADOW-PATCH T2: Two-component, Horizontal, Overhead and Vertical, Thin Patching Compound
bulletMEADOW-CRETES: Complete series of repair products
bulletFUTURA: Rapid-setting repair mortar
bulletMEADOWS’ GROUTS: 588, CG-86, PAC-IT
bulletREZI-WELD EPOXIES: 1000, LV, GEL PASTE, Rapid Set Injection, 3/2 Grout Patch, FLEX
bulletINTRALOK: P.V.A. Bonding Agent
bulletMEADOWS’ CURING & CURE / SEAL: Complete family of VOC-compliant and water-base products

This material last updated May, 2000.

Products for Concrete Performance
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.

Home Up 1100 - Clear Series 1200 - White 1300 - Clear 1600 - White 164 588 Precision Grout Ceramar Cera-Rod CG-86 Control Joints CS-309-25 CS-309-30 Deck-O-Foam Direct Fire Parking Sealant Duogard Duogard II Evapre Expo-Gloss Fibre Expansion Joint Gardox Hi-Spec Hydraset Hydraset-Free Intralok Lin-Seal Lin-Seal Emulsion Lin-Seal White Liqui-Hard Meadow-Plug Med-Cure Mel-Dek Mel-Drain DB Mel-Gard Melnar Mel-Prime SB VOC Mel-Prime WB Mel-Rol Pac-It Plastic Joint Materials Pourthane Premoulded Membrane Premoulded Tongue and Groove Protection Course PVC Waterstops Red Rosin Paper Rezi-Weld 1000 Rezi-Weld 3-2 Rezi-Weld Gel Paste State Rezi-Weld Gel Paste Rezi-Weld LV Rezi-Weld Rapid Set Roof Traffic Pads Sealex Sealmastic Sealmastic Emulsion Sealtight 1190 Sealtight 158 Sealtight 3405 Sealtight Acry-Lok Sealtight Air-Shield Sealtight CR-90 Sealtight Deck-O-Seal Sealtight Futura-15 Sealtight Kool-Rod Sealtight Meadow-Crete FNP Sealtight Meadow-Crete GPS Sealtight Meadow-Crete H2 Sealtight Meadow-Patch 20 Sealtight Meadow-Patch 5 Sealtight Meadow-Patch T1 Sealtight Meadow-Patch T2 Sealtight Patch-Prime Sealtight Poly-Grip Sealtight Poly-Jet 1614 Sealtight Poly-Jet 200-E Sealtight Poly-Jet 3406 Sealtight Premoulded Membrane Sealtight Rezi-Weld Flex Sealtight Safe-Seal 3405 Sealtight Sealex E-Z Sealtight Ultrite Degreaser Sealtight Seal Cure CS-309-25 Sewer Joint Sof-Seal Tiah Vibraflex Vocomp-20 Vocomp-25 Vocomp-30

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Last modified: August 09, 2004