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Concrete Repair
DP-600, Non-Sag, Gray
Technical Data July, 2003
3M鈩? Concrete Repair DP-600 is a non-sag, gray, rapid setting, two-component
Product Description
polyurethane. It is packaged as 1:1 ratio liquids in a duo-pak cartridge. With the
squeeze of the trigger, the components are automatically mixed through a mixing tip
and easily dispensed as a bubble-free non-sag paste.
Suggested Applications: 鈥? Rapid repair of spalled or cracked concrete walls and overheads
Building & Construction 鈥? Repairing leading edges of stairs
Maintenance & Repair
鈥? Custom tapping of bolts and screws into wood, concrete and masonry
Pool Maintenance &
Repair 鈥? Fixturing bolts to hold telephone cabling
Manufacturing & 鈥? Replaces spot welding, screws and nails in fixtured assemblies
Assembly
鈥? Bonding of dissimilar substrates
鈥? Non-brittle bonding to primed PVC and to ABS pipe
鈥? Tough non-brittle bonding of wood, metal, glass and plastic
Note: The following technical information and data should be considered representative or
Typical Properties
typical only and should not be used for specification purposes.
Test Conditions Test Method Properties
Appearance Cured PEC Gray mass
Work Life 10 g, 1/4" thick PEC 50 seconds
@ 77掳F (25掳C)
Tack-free Time 10 g, 1/4" thick PEC 2 minutes
@ 77掳F (25掳C)
Full Cure Time 10 g, 1/4" thick PEC 1 hour
@ 77掳F (25掳C)
Hardness After Full Cure 1 hour at 77掳F (25掳C) ASTM D2240-91 70 Shore D
Lap Shear Strength 7 days at 77掳F (25掳C) ASTM D1002-72 3,580 psi
Temperature Range Continuous PEC -60掳F (-51掳C) to
250掳F (121掳C)
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Concrete Repair
DP-600, Non-Sag, Gray
Section 1: Preparation
Installation
Prepare the Cartridge for Dispensing:
1. Select the desired dispenser (manual or pneumatic) and the desired mix tip.
2. Cut the blind-end off of the cartridge orifice and place the cartridge in the dispenser.
3. Dispense just enough material so that both components dispense equally.
4. Assemble the mix tip onto the cartridge with a half-twist.
Prepare the Concrete for the Vertical Repair and/or Custom Tap
1. Remove all loose aggregate, dust, old caulks, grease and waterproofing compounds
from repair surface. (Grind away any absorbed oils to ensure a clean surface.)
2. Clean repair surface with a bristle brush and use moisture and oil-free compressed air
to blow out debris.
3. Mask off area surrounding repair.
Section 2: Procedures
General Concrete Repair
1. Use a spreader to cover the repair and leave an excess of at least 1" around the repair
edges.
2. Keep the end of the mix tip immersed in the product as the repair is being filled.
3. Place the spreader over the filled repair.
4. Press down and hold for about 30 seconds to spread the repair compound.
5. Let repair cure before removing the spreader.
6. Note: At 75掳F (24掳C), a 1/4" thick bead sets in 50 seconds and becomes tack-free in
4 minutes. Thinner masses take longer to cure. Subsequent applications can be
made on the initial repair to build thickness.
Repairing Concrete Damage from Corrosion
1. Apply a pre-coat of cement corrosion inhibitor or protectant to excessively corroded
areas.
2. Allow pre-coat to dry thoroughly.
3. Follow the procedure for general concrete repairs.
Repairing Leading Edges on Steps and Stairways
1. For sharp edges: Follow the procedure for general concrete repairs and shape edge by
using two spreaders. Use one spreader to flatten the vertical edge of repair and the
other spreader for the top of repair.
2. For round edges: Form round edges with a piece of 3M鈩? Plastic Contouring Sheet
4904 on small repairs (less than 3" x 3"). Plastic must be at least 1" larger around
than the edges of the repair.
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Concrete Repair
DP-600, Non-Sag, Gray
Section 3: Repair Clean-up and Finishing
Installation
(continued)
1. Remove masking tape from repair.
2. Shave or grind cured product with 36 grit sandpaper to achieve desired shape.
3. Sand with 80 grit sandpaper to remove any scratches.
4. If 3M鈩? Concrete Repair DP-600 is applied in a traffic area, apply sand or some
type of grip to repaired surface area.
CUSTOM TAPPING AND FASTENING
Custom tapping is a form of chemical anchoring where cupboards, wall hangers or
other heavy cabinetry can be secured in place. However, the bolts or screws holding
heavy cantilevered items can be easily removed facilitating the re-location of the
cabinetry. Custom tapping is done by molding the threads of bolts and screws into
3M concrete repair DP-600 rather than be mechanically anchored into lag shields.
The tough molding properties of this product allow it to form and retain a high-
strength, non-brittle interlock between holes cored into concrete, wood or masonry
and the threads of the inserted bolt or screw. The release characteristics, upon
removal, are achieved by simply spraying the bolt or screw with 3M鈩? 5-Way
Penetrant鈥? (or other release agent) before the bolt or screw is inserted into the liquid
prior to its setting. To achieve a more permanent fixture, the bolts and screws simply
are not lubricated before embedding into the liquid prior to curing.
Section 1: Preparation For Custom-tapping:
1. Drill holes into the concrete, wood or masonry to the specified depth using the
chart below.
Bolt Width (in.) Minimum Hole Minimum Hole
Diameter (in.) Depth (in.)
1/4 3/8 2
3/8 1/2 3-1/2
1/2 5/8 4-1/4
5/8 3/4 5
3/4 7/8 6-3/8
7/8 1 7-1/2
1 1-1/8 8-1/4
1-1/8 1-1/4 9
1-1/4 1-3/8 9-3/4
1-3/8 1-1/2 10-1/2
1-1/2 1-5/8 11-1/4
2. Use a round bristle brush to clean the cored holes if they have not been freshly
drilled.
3. Use moisture-free and oil-free compressed air to blow out the debris.
4. Lightly coat the bolts or screws with 3M 5-Way Penetrant.
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Concrete Repair
DP-600, Non-Sag, Gray
Section 2: Procedures
Installation
(continued)
Procedure for Custom Tapping Concrete:
1. Dispense 3M鈩? Concrete Repair DP-600 into the hole nearly halfway full. To
obtain a consistent fill, judge for under-fill or overfill by counting the number of
squeezes of the trigger.
2. Insert the bolt or screw within the first 20 seconds after dispensing. The paste
characteristic of 3M concrete repair DP-600 will hold the bolt or screw in place
until it cures. Once the work life has been exceeded, do not disturb the bolt.
3. Move to the next hole to keep 3M concrete repair DP-600 flowing in the mixer
tip. If material sets in the mixer tip, replace the tip and start dispensing again.
4. 3M concrete repair DP-600 will become tack-free within 4 minutes and cure
within one hour. Note: It is best to wait for one full hour before extracting the bolt
or screw for securing the cupboards, wall hangers or other cabinetry in place.
5. Allow 3M concrete repair DP-600 to fully cure before applying a load. The
maximum torque recommended is 9.5 pounds.
Procedures for Custom Tapping Hollow Concrete Blocks, Wood or Masonry:
1. Use 3M鈩? Reinforcement Patch 4903 to create a mesh net around the bolt.
Leave at least a 1" excess of mesh abound the diameter of the bolt. Push the bolt
and mesh through the hole.
2. Remove the bolt and then fill the net 3/4-full with 3M concrete repair DP-600
while slowly backing the nozzle out of the hole.
3. Place the bolt in the hole and complete the fill, if necessary, to adjust for any
under-fill.
4. Allow 3M concrete repair DP-600 to fully cure before removing the bolt and
reinstalling it along with the supported load.
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Concrete Repair
DP-600, Non-Sag, Gray
Product has a shelf life of 6 months when properly stored in unopened packages at
Storage
temperatures of 65掳 to 85掳F (18掳 to 30掳C). Do not expose to excessive cold or
moisture.
No maintenance is required. However, if repairs become damaged, simply remove
Maintenance
damaged area then clean and reapply 3M鈩? Concrete Repair DP-600.
Precautionary Refer to Product Label and Material Safety Data Sheet (MSDS) for health and safety information before
using this product. For environmental information, refer to MSDS. Always wear gloves, eye protection,
Information appropriate respiratory protection, and work in a well-ventilated area. For additional health and safety
information, call 1-800-364-3577 or (651) 737-6501.
For Additional To request additional product information or to arrange for sales assistance, call toll free 1-800-362-3550
or visit www.3M.com/adhesives. Address correspondence to: 3M Industrial Adhesives and Tapes Division,
Information
Building 21-1W-10, 900 Bush Avenue, St. Paul, MN 55144-1000. Our fax number is 651-778-4244. In
Canada, phone: 1-800-364-3577. In Puerto Rico, phone: 1-787-750-3000. In Mexico, phone: 52-70-04-00.
Product Use All statements, technical information and recommendations contained in this document are based upon
tests or experience that 3M believes are reliable. However, many factors beyond 3M鈥檚 control can affect
the use and performance of a 3M product in a particular application, including the conditions under
which the product is used and the time and environmental conditions in which the product is expected to
perform. Since these factors are uniquely within the user鈥檚 knowledge and control, it is essential that the
user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the
user鈥檚 method of application.
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products, 3M warrants that each 3M product meets the applicable specifications at the time 3M ships the
Limited Remedy product. Individual products may have additional or different warranties as stated on product literature,
package inserts or product packages. 3M MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY ARISING OUT OF A COURSE OF
DEALING, CUSTOM OR USAGE OF TRADE. User is responsible for determining whether the 3M product
is fit for a particular purpose and suitable for user鈥檚 application. If the 3M product is defective within the
warranty period, your exclusive remedy and 3M鈥檚 and seller鈥檚 sole obligation will be, at 3M鈥檚 option, to
replace the product or refund the purchase price.
Except where prohibited by law, 3M and seller will not be liable for any loss or damage arising from the
Limitation of Liability
3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory
asserted, including warranty, contract, negligence or strict liability.
ISO 9002
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9002 standards.
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