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Div.
03930 |
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Specification NO. 391
REZI-WELD™ GEL PASTE
TROWEL-GRADE CONSTRUCTION
EPOXY
Description
SEALTIGHT REZI-WELD GEL PASTE is
a two-component, rapid setting epoxy compound designed for general concrete
repair work. It is an easy-to-mix, easy-to-apply paste ideal for filling
cracks, anchoring dowels, making small patches and general repairs in
horizontal, vertical and overhead concrete surfaces. GEL PASTE is also
suitable for surface sealing prior to pressure injecting. When used as
an adhesive, SEALTIGHT REZI-WELD GEL PASTE fills all voids between the
surfaces to be bonded.
SEALTIGHT REZI-WELD GEL PASTE is a moisture insensitive, high-modulus, high-strength, trowel-grade epoxy. It is color coded to help assure proper mixing and VOC compliant.
Features and Benefits
- Patches and repairs vertical or overhead concrete surfaces
- Fills all the gaps between the surfaces to be bonded…unlike liquid epoxy adhesives which might run out and reduce the bond area
- Easy-to-mix and apply with its trowel-grade consistency
- Offers high-viscosity, high modulus and high-strength characteristics
- VOC compliant
- Color-coded, innovative, unitized packaging assures proper mixing of two-components
- Excellent bond strength suitable for cap sealing
Specifications
|
Packaging
1 quart (.95 liter) Unit
1 gallon (3.79 liter) Unit
2 Gallon (7.58 Liter) Unit
10 Gallon (37.85 Liter) Unit
| Color: | Part A…White |
| Part B…Black | |
| Mix ratio: | 1:1 by volume |
| Pot life: | 45 minutes at 77 °F |
| Cure time: | 7 days at 77 °F |
| Shelf life: | 2 years in unopened container |
| Storage: | 40-95 °F (4-35°C) |
| Coverage: | 1 gal. neat yields 231 cubic inches |
APPLICATION
FOR INDUSTRIAL AND PROFESSIONAL USE ONLY
Surface Preparation… Mechanically abrade all
surfaces to be bonded. All surfaces to be bonded must be free of standing
water and completely clean of dirt, rust, curing compounds, grease, oil,
paint and unsound materials which would prevent a solid bond. Vacuum or
blow dust away with oil-free, compressed air. Smooth surfaces require
sanding or other mechanical abrasion. Exposed steel surfaces should be
sandblasted and vacuumed clean; if not possible, degrease the surface
and use sandpaper or a wire brush to reveal continuous, bright metal.
Mixing…Condition all components to 60-85° F for 24 hours prior
to use. Pre-mix each component. Mechanically mix at slow speed (600-900rpm)
using a drill and Jiffy Blade or drum mixer for 3 minutes or until completely
mixed while scraping the sides to ensure complete blending of components.
The mixed product should be uniform gray in color and not show streaks.
Avoid air entrapment. Mix only very small quantities by hand for a minimum
of 3 minutes or until sufficiently blended together using the supplied
stirring stick. Scrape sides of the container to ensure complete blending
of the components. Mix only the amount of epoxy that can be applied within
the product's potlife. Potlife will decrease as the ambient temperature
and/or mass size increases.
METAL ANCHORS IN PREFORMED HOLES IN CONCRETE…Preformed holes should
be approx. 1/4" (6.35mm) larger in diameter than the anchor bolt
diameter. The depth of the hole should be 10-15 times the bolt diameter.
Fill the hole from the bottom up, about half way with mixed epoxy and
place the bolt, dowel or rebar. Top off with more epoxy and finish. Doweling
configurations must be approved or designed by an engineer.
CRACKS IN VERTICAL OR OVERHEAD STRUCTURES…For non-moving cracks and
joints, use a trowel to apply the paste full depth and strike off flush
at the surface in a single pass. For structural crack injection repairs,
use a dual-component gel pump.
PATCHES IN CONCRETE STRUCTURES…GEL PASTE makes
a high-strength material for patching, topping, grouting and repairing
spalls and other defects in concrete. Average thickness of the patch or
topping should be no greater than 1/4 to 1/2 (6.35 to 12.7mm) per lift.
OTHER BONDING…To bond cured concrete or metal to concrete, apply
a layer no less than a 1/64" (.40mm) to the prepared surface and
join immediately. No firm clamping pressure is necessary beyond what will
hold parts in place. When bonding fresh concrete to cured concrete, apply
GEL PASTE at approximately 85-100 sq.ft/gal. (2.1-2.4 sq.m/L). NOTE: Cured
concrete surfaces to be bonded should be at least 28 days old.
SURFACE SEALING…Apply mixed epoxy over entire length of crack to be pressure injected. Ensure complete encapsulation to avoid leaking. Adjacent concrete surfaces must be mechanically abraded to ensure a proper bond. Allow for suitable cure time prior to injecting.
TECHNICAL DATA
| Test Method | Actual | Required per ASTM C 881-99, TYPE IV |
| Gel Time Per ASTM C 881-99 | 45 minutes | Minimum 30 minutes |
| Compressive Strength Per
ASTM D 695-96 @ 1 day @ 7 days |
9,000
psi (62 MPa) 11,500 psi (79 MPa) |
Not Required Minimum 10,000 psi (70 MPa) |
| Compressive Modulus Per
ASTM D695-96¹ @ 7 Days |
400,000 psi (2758 MPa) | Minimum 200,000 psi (1,400 MPa) |
| Slant Shear Bond Strength
Per ASTM C 882¹, Moist Cured @ 2 days (Old to Old Concrete) @ 14 days (Old to Old Concrete) @ 14 days (New to Old Concrete) |
1,500
psi (10.0 MPa) 2,000 psi (14.0 MPa) 2,500 psi (17.0 MPa) |
Minimum
1,000 psi (7.0 MPa) Minimum 1,500 psi (10.0 MPa) Minimum 1,500 psi (10.0 MPa) |
| Tensile Elongation Per
ASTM D638-98¹ @ 7 days |
1.5% | Minimum 1% |
| Heat Deflection Temp.
Per ASTM D648-98¹ @ 7 days |
125ºF (53ºC) | Minimum 120ºF (50ºC) |
| Linear Coefficient of Shrinkage Per ASTM D2566¹ @ 7 days | 0.003 | Maximum 0.005 |
| Water Absorption Per ASTM
D570-98¹ @ 7 Days |
0.51% w/w | Maximum 1.0% w/w |
| All Technical Data is
typical information, but may vary due to testing methods, conditions
and operators. ¹ Independent Reports Are Available Upon Request. |
||
Clean Up
Clean tools and equipment immediately with Toluene or Xylene. Clean equipment
away from all ignition sources and avoid breathing vapors or allowing
epoxy-containing solvent to contact skin. Should this material come in
contact with the skin, wash thoroughly with soap and water, not solvent.
Limitations / Precautions
Not recommended for use when the concrete temperature has been below 40°F
for the past 24 hours. Do not thin with solvents or use to seal cracks
under hydrostatic pressure. Do not warm epoxy over direct heat…use
the double-boiler method or store material in warm room, prior to application.
Unused epoxy will generate excessive heat, especially in large quantities.
Unused epoxy should be mixed with dry sand in the container to help lower
heat.
This material last updated June, 2002.
| Div. 03930 |
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