3
Concrete Repair
DP-600, Self-Leveling, Gray
Technical Data June, 2003
3M鈩? Concrete Repair DP-600 is a self-leveling, 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 and easily dispensed as a bubble-
free self-leveling liquid.
Suggested Applications: 鈥? Rapid repair of spalled or cracked concrete floors or pool decks in high traffic areas
Building & Construction 鈥? Re-installing posts and rails
Maintenance & Repair
鈥? Custom tapping of bolts and screws into wood, concrete and masonry
Pool Maintenance &
鈥? Tough, non-brittle bonding of wood, metal, glass and plastic
Repair
鈥? Fixturing of hand/grabrails into pool decks
鈥? Rapid repair of pool decks prior to being coated
Typical Properties Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Test Conditions Test Method Properties
Appearance Cured PEC Gray mass
Viscosity Part A 77掳F (25掳C) HBDVI+CP 4050 cps
Viscosity Part B 77掳F (25掳C) HBDVI+CP 2500 cps
Work Life 10 g, 1/4" thick PEC 70 seconds
@ 77掳F (25掳C)
Tack-free Time 10 g, 1/4" thick PEC 4 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 2,300 psi
Temperature Range Continuous PEC -60掳F (-51掳C) to
250掳F (121掳C)
3
Concrete Repair
DP-600, Self-Leveling, Gray
Prepare the Cartridge for Dispensing:
1. Select the desired dispenser (manual or pneumatic) and mix tip.
2. Cut the blind-end off of the cartridge orifice or remove the plugs 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.
CONCRETE REPAIR, SELF-LEVELING:
Section 1: Preparation
General Preparation for Concrete Repairs
1. Prepare a cavity, depression, groove, saw-cut, or crack by removing all loose aggregate, dust, old caulks,
grease or other compounds from the repair surface.
2. For maximum relief of stresses in large concrete sections, it is best to create a
1/4-inch saw cut entirely through the concrete. However, first determine that there are no other structural
limitations including rebar, plumbing and electrical installations. The use of a foam backer embedded to
within 1/4-inch of the surface is recommended for maximum stress relief.
3. For tracing cracks for stress relief, it is best to use a tapered grinder to create a taper starting at 1/4-inch at the
top and tapering deeply into the concrete.
4. Use a bristle brush to remove the debris. Then use moisture-free and oil-free compressed air to blow out the
fine dust.
5. Mask off the areas surrounding the repair allowing approximately a 1-inch overlap of 3M鈩? Concrete Repair
DP-600 around the periphery of the prepared cavity.
Preparing for Damage from Corrosion:
1. Apply a pre-coat of concrete corrosion inhibitor or protectant exclusively to corroded areas.
2. Allow the pre-coat to dry thoroughly.
-2-
3
Concrete Repair
DP-600, Self-Leveling, Gray
Section 2: Procedures
General Procedure for Doing Concrete Repairs
1. Keeping the mixer tip at the deepest portion of the repair area, dispense into the prepared cavity, depression,
void, groove or crack.
2. Slightly over-fill the prepared cavity.
3. 3M鈩? Concrete Repair DP-600 will self-level and set approximately within one minute and leave a slight
meniscus. If desired, one can create a repair flush and level to the concrete floor on smaller areas up to 6
inches square by overlaying a slightly stiff polyethylene sheet (approximately the modulus of a plastic
spreader) just prior to the set of 3M concrete repair DP-600.
4. Overfilling 3M concrete repair DP-600 and allowing it to overlap approximately one inch along the edges of the
repair tapering to just a few mils thickness provides a substantial tie into the concrete and increases the lifetime
of the repair.
5. At 75掳F (24掳C), a 1/4"-thick section sets and becomes tack-free within 4 minutes and will cure within one
hour. Note: Thicker masses or substrates at higher temperature take less time to cure. Thinner masses or
substrates at lower temperature take more time to cure.
Section 3: Clean-up and Finishing
1. Remove the masking tape surrounding the repair areas.
2. If desired, grind the cured product with 36 to 50 grit sanding disks or sandpaper to take off any rough edges
and achieve the desired shape. Sand with finer grit sandpaper to the desired finish.
-3-
3
Concrete Repair
DP-600, Self-Leveling, Gray
CUSTOM TAPPING AND FASTENING
The flanges of posts and rails, auditorium and stadium seats, pallet racks, and other load-bearing structures are
usually secured into concrete floors by shooting nails or screwing lag bolts into shields embedded within cored
holes. Custom tapping provides the advantage that these structures can be easily removed and relocated to other
locations without having to grind down the protruding nails or fill the remaining cored holes.
Custom Tapping is done by molding the threads of bolts and screws into 3M鈩? Concrete Repair DP-600. The
tough molding properties of 3M concrete repair DP-600 allows it to form and maintain a high-strength, non-brittle
interlock between holes cored into concrete (or wood, ceramic 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 (or other release agent) before the bolt or screw is inserted into the liquid 3M concrete repair
DP-600 prior to its setting. To achieve a more permanent fixture, the bolts and screws simply are not lubricated
before imbedding into the liquid 3M concrete repair DP-600 prior to setting.
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. Use moisture-free and
oil-free compressed air to blow out the debris.
3. Lightly coat the bolts or screws with 3M 5-Way Penetrant.
-4-
3
Concrete Repair
DP-600, Self-Leveling, Gray
Section 2: Procedures
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 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
9.0 pounds.
Note: Not for use in repairing or anchoring diving boards.
RE-ANCHORING HANDRAILS AND GRABRAILS
Section 1A: Preparation of Hand/Grabrails
1. Bore a hole through the base of the hand/grabrail just above grade level to allow introduction of the product.
2. Using 80 grit sandpaper, roughen the footing surface of the hand/grabrail which is to be imbedded below the
concrete grade.
3. Refer to instructions on cartridge for dispensing.
Section 1B: Preparation of Concrete for Re-anchoring
1. Chip away the cracked or broken concrete to allow removal of the hand/grabrail.
2. Leave the concrete as close as possible around the hand/grabrail. It is best to allow the concrete to remain
intact as close as possible (within 1/2 to 1 inch all around) to the base of the hand/grabrail.
3. Dig down to the base of the concrete, typically 4- to 6-inches deep.
4. Expose any rebar, if possible, in order to create a ground connection to the rebar.
5. Create as much as a 1-inch undercut under the concrete in a smooth taper from the concrete surface.
6. Remove all of the loose concrete particles and dust prior to encasing the replacement hand/grabrail.
7. Attach the replacement hand/grabrail to surrounding rebar using a copper wire. Cinch the connection down
tightly, allowing a slight amount of slack in the wire connection.
8. Create a shield to corrosion at the base of the hand/grabrail by laying a piece of polyethylene plastic at the base
of the hole.
9. Insert the hand/grabrail in the hole. Align the hand/grabrail for its elevation and vertical plumb.
-5-
3
Concrete Repair
DP-600, Self-Leveling, Gray
Section 2 Encasement Procedure
1. Dispense 3M鈩? Concrete Repair DP-600 into the concrete hole. Product will remain liquid for approximately
50 seconds, and fully cure in 1 hour. Dispense more cartridges as necessary to bring the fill level up to the
concrete surface level.
2. Dispense 3M concrete repair DP-600 into the inside of the hand/grabrail. Fill with product up to and slightly
above the grade level. (Filling the inside of the post provides extra strength and protection against corrosion.)
3. Apply cement dust or sand, if desired, to blend the surface appearance into the surrounding concrete.
4. If 3M concrete repair DP-600 is applied in a traffic area, apply sand or some type of grit to repaired surface area.
Section 3: Repair Clean-up and Finishing
1. Shave or grind cured product with 36 grit sandpaper to achieve desired shape.
-6-
3
Concrete Repair
DP-600, Self-Leveling, Gray
This product has a shelf life of 6 months when properly stored in unopened packages
Storage
at temperatures of 65掳F to 85掳F (18掳C to 30掳C). Do not expose to excessive cold or
moisture.
No maintenance is required. However, if repairs become damaged, simply reapply
Maintenance
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.
Warranty and Unless stated otherwise in 3M鈥檚 product literature, packaging inserts or product packaging for individual
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.
3
Industrial Business
Industrial Adhesives and Tapes Division Recycled Paper
3M Center, Building 21-1W-10, 900 Bush Avenue 40% pre-consumer Printed in U.S.A.
St. Paul, MN 55144-1000 10% post-consumer 漏3M 2003 78-9236-7100-8 (6/03)
-7-
|