Product Data Sheet
|03 01 30.71|
DATA SHEET 3900-322
Exposed Steel Primer
PATCH-PRIME Exposed Steel Primer is a polymer modified, cementitious based, two component material consisting of a dry powder and a liquid component packaged as a unit in a mixing container.
Provides corrosion protection for all types of embedded steel, i.e. rebar, anchor bolts, bearing plates etc., exposed during preparation for concrete repairs where a cementitious repair material will be applied . . . horizontal, vertical or overhead. Replaces smooth, non-absorbent, epoxy rustproofing coatings. Suggested for use with all W. R. MEADOWS’ cementitious Patching Compounds.
Do not apply to unclean, rusty steel.
Do not apply when rain is imminent or when the temperature is expected to be below 4°C (40°F) within 24 hours.
At temperatures above 32°C (90°F) the pot and work life is severely limited.
|Compressive Strength:||30 MPa (4500 psi)|
|Adhesion To Steel:||3.4 MPa (500 psi)|
|Freeze/Thaw Resistance ASTM C-666||0.0% loss|
|Resistance to Chloride Penetration AASHTO T277||430 – 520 Coulombs|
|Coverage||Single coat, 2.25 m² (24 ft.²) of surface area per unit|
Recommended two coat application 1.11 m² (12 ft.²) per unit
One unit is sufficient for 30.5 m (100 ft.) of #4 (12.7 mm, 1/2″) rebar, 2 coats
|Packaging||5 litre plastic mixing pail – includes:|
2 plastic bags, approximately 2.18 kg
(4.8 lbs.) each of premixed powder
1 x 1 litre jug of liquid component
|Storage||Keep from freezing.|
Should liquid component freeze it becomes unusable and must be discarded.
Keep lid on liquid container and on mixing pail in storage to keep powders dry.
Shelf life is 12 months in a dry, cool area.
Sandblasting and/or waterblasting is recommended to remove all rust, grease, etc.
Apply the first coat to the cleaned steel, using a stiff brush, as soon as possible after the steel is cleaned. Let this first coat dry for approximately 10 to 15 minutes and then apply the second coat.
Allow primer coat to dry and stiffen for 1 to 2 hours and then place repair material.
Repair Compound Placement
The placement of the repair compound may follow initial curing or be delayed as necessary. It is however important that the primer be kept clean during any delay.
Clean tools immediately after use with water. Hardened material can only be removed mechanically.
Proper application is the responsibility of the user. Field visits by W. R. MEADOWS’ personnel are for the purpose of making technical recommendations only, and are not to supervise or provide quality control on the job-site.
SAFETY & TOXICITY
Prolonged contact with skin is not recommended, use rubber gloves to avoid sensitivity to Portland cement. Avoid contact with the eyes, goggles are recommended. Wash thoroughly with water. See product label and Material Safety Data Sheet for additional information. Read and follow all safety precautions.
Section 03 01 30.71