Rustproofing Primer and Coating for Steel

03 01 30.71 | No. 8701009 | Print Version | Safety Data Sheet: Comp. A | Comp. B


FIBRE-PRIME is a proprietary, water-based, polymer-modified cement slurry that provides excellent protection of rebar and steel substrates.  FIBRE-PRIME is a two-component product, consisting of Component A (dry) and Component B (liquid). FIBRE-PRIME contains highly effective corrosion inhibitors active on both anodic and cathodic corrosion sites.


FIBRE-PRIME is used as a rustproofing primer before application of cementitious coatings or as a protective coating in most immersed and non-immersed applications.


  • Rustproofs and protects ferrous metals
  • Contains effective corrosion inhibitors
  • Water-based formulation
  • Non-toxic
  • Contains no VOCs
  • Bonds to wet steel
  • Excellent freeze-thaw durabiity
  • Applicator friendly
  • Cost-effective


A kit consists of dry Component A packaged in a 19.8 lb. (9 kg) bag and liquid Component B packaged in a 0.61 gal. (2.3 L) unit.


One kit yields 5.5 L (0.19 ft3). Apply in two (2) coats for a total thickness of 1 mm (40 mils).  Covers approximately 59 ft.2 (5.5 m2) or 383 lineal ft. (117 LM) of 15 mm (5/8″) around the circumference of the rebar.


Shelf life is 12 months when stored in unopened containers on pallets in a cool, dry area.


  • Complies with California, New York, and OTC VOC regulations for rust preventative coatings


Compressive Strength
(ASTM 109 Modified)
5940 – 6230 psi
(41 – 43 MPa)
Adhesion to Steel
(Direct Tension Pull Off)
380 – 500 psi
(2.6 – 3.5 MPa)
Freeze/Thaw Resistance
(ASTM C666-A)
0% loss
Carbonation Resistance (R), 1.5 mm thick layer, Klopfer (R>50 m) Equivalent air thickness R=1280 m. Equivalent concrete thickness is 3.2m
H2S Resistance
(Gemite ISO TP 012)
Very good
Cathodic Disbondement
(CSA – Z245)
No disbondment
Color: Dark Gray


Surface Preparation … Remove all loose rust, grease, dust, and other contaminants that could affect adhesion. Wet or dry abrasive sand blasting or wire brush is recommended. The “white metal” surface preparation is not required.

Mixing … Place the liquid component B into a clean container.  Add the dry component A while mixing using a drill (400 – 600 rpm) with a mixing paddle until a smooth and lump-free brushable mix is obtained.  Allow to sit for 3 – 5 minutes, then re-mix. Mix only the amount of material which can be applied within 45 minutes after mixing. Discard any material not used within 50 minutes.

Application Method … Apply a thin coat of FIBRE-PRIME by brush or (slurry) spray. Let dry for 10 – 15 minutes then apply the second coat. At least two coats are recommended, with a total minimum dry film thickness of 1

mm (40 mils). FIBRE-PRIME is also used as an excellent bonding agent for concrete repair materials. Apply repair materials to wet FIBRE-PRIME. Contact W. R. MEADOWS for advice on specific applications.

Curing … Cure by air drying.

Clean Up … Tools must be cleaned with water immediately after use. Cured material can only be removed mechanically.


Do not apply FIBRE-PRIME when the temperature is expected to be below 40° F (4° C) within 24 hours or when rain is imminent.  Consult W. R. MEADOWS for applications over previously coated steel surfaces.  The liquid component B must not freeze.


FIBRE-PRIME is non-toxic and non-flammable. Skin might be sensitive to cement. Use of rubber gloves is recommended.  Avoid contact with skin. If contact occurs, flush immediately with water. Seek medical advice if irritation occurs. Harmful if digested. Keep product out reach of children. FOR INDUSTRIAL USE ONLY. Consult SDS for additional information.