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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NO. 350


SEALTIGHT INTRALOK Bonding Agent is a tough, durable, ready-to-use interface or intramix bonding agent. It assures a tenacious bond on interior concrete repairs between new-to-old or new-to-new concrete.

SEALTIGHT INTRALOK Bonding Agent is a high-solids content, water dispersion of bonding polymers compounded specifically for modifying Portland Cement compositions. It is a milky-white, non-yellowing liquid ready for use as an interface or intramix bonding agent. When properly mixed and applied, INTRALOK forms a bond between new-to-old or new-to-new concrete.

Cement mortars modified with INTRALOK are hard, tough and durable. It offers superior flexural, adhesive and impact strengths plus excellent abrasion resistance. INTRALOK reduces permeability and chloride intrusion, improving freeze/thaw resistance and reducing rebar corrosion.

INTRALOK-modified concrete is unaffected by most industrial chemicals and will not yellow or discolor.

INTRALOK's most common uses are for interior patching and resurfacing, spray and fill coats, precast repairs and industrial flooring applications.

INTRALOK is ideal for interior bonding, topping, leveling, patching and dressing of concrete and masonry. As a bonding grout, it improves the adhesion of pneumatically applied concrete or mortar. INTRALOK-modified mortars provide excellent adhesion to a variety of surfaces, including concrete, masonry and brick. The result is a more attractive, durable, uniform concrete finish which costs far less than polishing or rubbing.

INTRALOK is also ideal for use as an interface or intramix bonding agent in bonding grouts, topping mixtures, finishing and mortar mixes.


bulletForms an excellent bond to concrete.
bulletFunctions equally effectively for interior or exterior repairs between new-to-old or new-to-new concrete
bulletOffers superior flexural, adhesive and impact strengths plus excellent abrasion resistance
bulletProvides a hard, durable, weather-resistant finish at far less cost than polishing or rubbing
bulletWill not after-yellow or discolor
bulletWill not stain of discolor concrete
bulletReady-to-use...requires no additional mixing
bulletReduces permeability
bulletReduces chloride intrusion


Stiff Brush


Paint Brush

Pointed Trowel

Wood Float


Hand Sprayer

SURFACE PREPARATION: All surfaces to which INTRALOK bonding grout and/or topping is to be applied must be structurally sound, clean and free of grease, oil, dust, dirt, curing and release compounds and other foreign contaminants. All loose and unsound concrete must be removed.

Pre-soak all surfaces with water prior to applying the bonding grout. Remove all puddles and free water. The cementitious mix must be applied while the INTERLOK is still tacky.

MIXING: Specific mixing proportions for these various INTRALOK mixes are listed on the container. All cautions, mixing and application information and directions furnished on container labels should be read and followed.

For normal mixing, dry blend the Portland Cement and sand. Mix the INTRALOK and water together, add the cement-sand mix and then mechanically blend the complete mix thoroughly. The quantity of water should be determined by trial mix...where only 50% of the water is first added to the INTRALOK before adding to the sand-cement mix. After thorough preliminary mixing, add increments of additional water until the desired consistency is obtained.

Application Mixes by Volume

1. Bonding Slurry:

5 parts Portland Cement
2.5 parts fine sand (ASTM C 144)
Water: Enough for a thick, creamy consistency (Approximately 1 part).

One-gallon unit of INTRALOK used to mix a bonding slurry will yield approximately 0.47 cubic feet (.014m), enough to cover an area of 90.24 feet (8.45m) at 1/16" (1.59mm) thickness or 45 square feet at 1/8" (3.18mm) thickness. Apply with a stiff bristle brush, be sure to work bonding slurry into existing concrete pores.

2. Topping and Shallow Patching Mix:

5 parts Portland Cement
15 parts fine sand (ASTM C 404, Size #2)
Water: Enough for trowelable consistency (Approximately 2 parts).

3. Mortar Mix:

5 parts Portland Cement
15 parts fine sand (ASTM C 404, Size #2)
Water: Enough for desired consistency (Approximately 1-1/2 to 2 parts).

One gallon of INTRALOK used in a topping or mortar mix will yield approximately 1.8 cubic feet (.05m) to cover an area of 86 square feet (7.99m) at 1/4" (6.35mm) thickness. Topping or mortar mix should be applied while the INTRALOK Bonding Grout is still soft and plastic.

4. Finish Mix: (For non-traffic surfaces)

10 parts Portland Cement
10 parts fine sand (ASTM C 404, Size #2)
Water: Enough for stiff, brushable consistency (Approximately 4 parts).

INTRALOK Bonding Grout must be thoroughly worked and scrubbed onto the prepared concrete surface in order to realize maximum bonding efficiency.

1 gallon (3.79 L) Units (4 per carton)
5 gallon (18.93 L) Pails
55 gallon (208.20 L) Drums

Approximately 300 square feet per gallon (7.36m/L) straight; diluted with equal parts of water, approximately 600 ft. per gallon (14.73m/L).

Keep from freezing. Approximate work life is 30-40 minutes at 70F. Use care in finishing thin overlays. Wood float when possible. Steel troweling should be limited to a minimum number of passes 10-15 minutes after placement. When INTRALOK is used in a bonding grout and the patch topping is plain concrete, use a membrane curing compound. If the patch or topping contains INTRALOK as an admixture, wet curing is not recommended.

INTRALOK Bonding Grout or Topping Mix should be mixed thoroughly to remove lumps. Avoid air entrapment. Clean tools with water immediately. Follow all cautions on container labels. Do not add to premixed grouts. Specifier and user shall determine suitability of product for specific applications and assume all responsibilities in connection therewith. INTRALOK has an effective shelf life of 6 months from the date of manufacture.

Note: Increased amounts of various fillers, extenders or additives in the concrete mix can result in the concrete having a higher than normal porosity and some very porous hot spots. Coverage ratios must be adjusted to compensate for resulting penetration and additional coverage coats required to provide proper surface treatment. Read and follow application information and precautions. Refer to Material Safety Data Sheet for complete Health and Safety Information.

This material last updated February 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.


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