Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Features/Benefits
- Moisture insensitive - allowing installation and curing in damp environments
- Withstands freeze-thaw conditions
- Little to no odor
- High modulus
- Service temperature range between 35°F and 180°F
- DOT Not Regulated (non-corrosive)
Applications & Uses
- Applications
- Application Area
- Compatible Substrates & Surfaces
- Primary Applications
- Anchoring threaded rods, bolts and rebar dowels into uncracked concrete.
- Short and long term tensile anchoring.
- Grouting dowel bars and tie bars.
- Pick-proof sealant for jails/prisons and kennels.
- Bonding agent for fresh to hardened concrete, and hardened to hardened concrete.
- Coverage
- One 21.2 oz cartridge yields 38.3in3 of epoxy.
- One 53 oz cartridge yields 97.6in3 of epoxy.
- Dural HS Gel Cure Schedule
Substrate Temperature Working Time Full Cure Time 40°F 36 min 72h 75°F 20 min 24h 110°F 12 min 18h - Working and full cure times are approximate and may be linearly interpolated between listed temperatures.
- Substrate and ambient air temperature should be from 40 - 110°F.
- When ambient or substrate temperature is below 70°F, condition the DURAL HS GEL to 70 - 75°F prior to use.
- Directions For Use
Drilling and Cleaning Holes
Using a rotary hammer drill, and a bit that conforms to ANSI B212.15 and is the appropriate size for the anchor diameter to be installed, drill the hole to the specified embedment depth. Always wear appropriate personal protection equipment (PPE) for eyes, ears & skin, and avoid inhalation of dust during the drilling and cleaning process.
Remove any standing water from hole before beginning the cleaning process. Using oil-free compressed air with a minimum pressure of 80 psi, insert the air wand to the bottom of the drilled hole and blow out the debris with an up/down motion for a minimum of 4 - 5 seconds.
Select the correct wire brush size for the drilled hole diameter, making sure that the brush is long enough to reach the bottom of the drilled hole. Reaching the bottom of the hole, brush in an up & down and twisting motion. The brush should contact the walls of the hole. If it does not, the brush is either too worn or small and should be replaced with a new brush of the correct diameter. Blow the hole out once more to remove brush debris using oil-free compressed air with a minimum pressure of 80 psi. Visually inspect the hole to confirm it is clean. If the installation will be delayed for any reason, cover cleaned holes to prevent contamination.
Preparing Cartridges
Remove the protective cap from the DURAL HS GEL cartridge and insert the cartridge into the dispensing tool. Before attaching a static mixer, balance the cartridge by dispensing a small amount of material until both components are flowing evenly. Only after the cartridge has been balanced, attach the static mixer to the cartridge. Take note of the air and base material temperatures and review the working/full cure time chart before starting the injection process.
Dispense the initial amount of material from the mixing static mixer onto a disposable surface until the product is a uniform gray color with no streaks, as adhesive must be properly mixed to perform as published. Dispose of the initial amount of adhesive before injection into the drill hole. When changing cartridges, never re-use static mixers. A new static mixer should be used with each new cartridge.
Installation and Curing
Insert the static mixer into the bottom of the hole and fill from the bottom to the top approximately two-thirds full, being careful not to withdraw the nozzle too quickly as this may trap air in the adhesive. When using a pneumatic dispensing tool, ensure that pressure is set at 90 psi maximum. Do not disturb, torque or apply any load to the installed anchor until the specified full cure time has passed. The amount of time needed to reach full cure is base material temperature-dependent. Refer to the Cure Schedule table for the full cure time.
Before inserting the threaded rod or rebar into the hole, make sure it is clean and free of oil and dirt and that the necessary embedment depth is marked on the anchor element. Insert the anchor element into the hole while turning 1 - 2 rotations before the anchor reaches the bottom of the hole. Excess adhesive should be visible on all sides of the fully installed anchor. For horizontal installations, wedges should be used to center and support the anchor while the adhesive is curing. Use extra care with deep embedment or high-temperature installations to ensure that the working time has not elapsed before the anchor is fully installed.
Setting Ports & Sealing Cracks
Place a small amount of mixed DURAL HS GEL on the back of the port and carefully place it centered over the crack. Be careful to not fill the hole of the injection port. Place neat DURAL HS GEL over the face of the cracks to be pressure injected, and around each injection port. Allow DURAL HS GEL to sufficiently harden before injecting, to prevent blowouts.
- Clean Up
Clean tools and application equipment immediately with acetone, xylene, or MEK. Clean spills or drips with the same solvents while still wet. Hardened DURAL HS GEL will require mechanical abrasion for removal.
Properties
- Physical Form
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Consistency | 6.4 | mm | ASTM C881 |
| Gel Time (60g Mass) | 38.0 | minutes | ASTM C881 |
| Bond Strength (2 Days) | 2850.0 | psi | ASTM C882 |
| Bond Strength (14 Days) | 2790.0 | psi | ASTM C882 |
| Water Absorption (14 Days) | 0.53 | % | ASTM D570 |
| Heat Deflection Temperature (7 Days) | 132.0 | °F | ASTM D648 |
| Linear Coefficient of Shrinkage | 0.002 | — | ASTM D2566 |
| Compressive Yield (7 Days) | 10860.0 | psi | ASTM D695 |
| Compressive Modulus (7 Days) | 209000.0 | psi | ASTM D695 |
Regulatory & Compliance
- Specifications & Compliances
- Complies with ASTM C881-14 Types I, II, IV, and V, Grade 3, Classes A, B, and C
- Meets the requirements of AASHTO M 235 U.S.
- DOT Not Regulated (non-corrosive)
Packaging & Availability
- Packaging Type
- Packaging
DURAL HS GEL is packaged in cases of 21.2 oz cartridges (12 cartridges per case). Cases of 53 oz cartridges (6 cartridges per case) are available on a made to order (MTO) basis, and may be subject to minimum order quantities. The mix ratio is 1:1 by volume.
Storage & Handling
- Pot Life
- 13.0
- Shelf Life
28 months when stored in unopened containers in dry conditions. Store between 40°F and 95°F.
- Precautions/Limitations
- Working time and cure time will decrease as the temperature increases, and will increase as the temperature decreases.
- Install DURAL HS GEL with a high-quality, professional-grade gun with a gear ratio of at least 26:1 for ease of application and best results.
- Do not thin DURAL HS GEL as this may affect cure and performance.
- DURAL HS GEL will discolor upon prolonged exposure to ultraviolet light and high-intensity artificial lighting.
- Not recommended for any overhead application where there may be a sustained tensile load.
- For anchoring applications, concrete must be a minimum of 21 days old before anchor installation.
- Performance characteristics, such as seismic and long-term load resistance, were tested by ASTM E488-96 (2003) & E1512-01 (2015) provisions and not that of ACI 355.4, and are therefore not applicable in the concrete tension zone. Always consult with a design professional before use to ensure product applicability.