Sikagard®-664
Versatile Epoxy for High Performance Protective Coatings
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Sikagard®-664 is a pigmented, two part low viscosity, self-priming, epoxy coating/binder used for smooth and textured coatings and/or broadcast overlayments.
- Good chemical and mechanical resistance.
- Easily applied with brush, roller or squeegee.
- Glossy aesthetic finish.
- Slip resistant surface possible.
- Durable, impermeable and seamless.
- Solvent-free, neutral odor.
- Low mixed viscosity.
Usage
Roller coat and self-leveling slurry for concrete and cement screeds with normal up to medium heavy wear (e.g. storage, hallways, corridors and assembly halls, maintenance workshops, garages and loading ramps), or as a seal coat for broadcast systems. When used as a primer, Sikagard®-664 can be considered when ≤ 4 % moisture content by mass (pbw – part by weight) is measured on the concrete substrate with a Tramex® CME/CMExpert type concrete moisture meter.Advantages
- Good chemical and mechanical resistance.
- Easily applied with brush, roller or squeegee.
- Glossy aesthetic finish.
- Slip resistant surface possible.
- Durable, impermeable and seamless.
- Solvent-free, neutral odor.
- Low mixed viscosity.
Packaging
Component A: 3.0 US gal. (11.4 L); Component B: 1.5 US gal. (5.7 L) Components A+B: 4.5 US gal. (17 L) (Ready to mix unit).
Color
Gray, Red & Tan
Product Details
Shelf Life
2 years in unopened container.
Storage Conditions
Store dry between 40–90 °F (4–32 °C). Precondition material for at least 24 hours between 65 °F and 75 °F (18–24 °C).
Volatile organic compound (VOC) content
| < 30 g/l | (ASTM D-2369) |
Shore D Hardness
| 76 (7 days) | (ASTM D-2240) 73 °F (23 °C) |
Compressive Strength
| 7,250 psi (50 N/mm2) (28 days days) | (ASTM C-579) 73 °F (23 °C) |
Flexural Strength
| 2,900 psi (20 N/mm2) (28 days days) | (ASTM C-580) 73 °F (23 °C) |
Tensile Adhesion Strength
| > 400 psi (2.7 N/mm2) (100 % concrete fail) | (ASTM D-4541) 73 °F (23 °C) |
Chemical Resistance
Please consult Sika Technical Service.
Coefficient of Friction
| 0.6 | (ANSI 326.3) |
Application
Pot Life
| Temperature | Time |
| 50 °F (10 °C) | ~ 50 minutes |
| 68 °F (20 °C) | ~ 25 minutes |
| 86 °F (30 °C) | ~ 15 minutes |
Cure Time
| Temperature | Foot traffic | Light traffic | Full cure |
| 50 °F (10 °C) | ~ 24 hours | ~ 3 days | ~ 10 days |
| 68 °F (20 °C) | ~ 12 hours | ~ 2 days | ~ 7 days |
| 86 °F (30 °C) | ~ 8 hours | ~ 1 days | ~ 5 days |
Waiting/Recoat Times
Before applying second coat of Sikagard®-664 on Sikagard®-664 allow:
| Temperature | Minimum | Maximum |
| 50 °F (10 °C) | 24 hours | 3 days |
| 68 °F (20 °C) | 8 hours | 2 days |
| 86 °F (30 °C) | 6 hours | 1 day |
Before applying Sikagard® Epoxy or Polyurethane on Sikagard® 616 allow:
| Temperature | Minimum | Maximum |
| 50 °F (10 °C) | 24 hours | 3 days |
| 68 °F (20 °C) | 8 hours | 2 days |
| 68 °F (20 °C) | 6 hours | 1 day |
Coverage
Smooth Finish Coating: Prime coat: 160 - 200 ft2/US gal (3.9–4.9 m2/L) at 8–10 mils (0.20–0.25 mm) wet film thickness (w.f.t.). Wear coat: 105 –135 ft2/US gal (2.6–3.3 m2/L) at 12–15 mils (0.30–0.38 mm) wet film thickness (w.f.t.).
MIXING
Mixing Ratio - 2 : 1 by volume.
Primer and Wear Coat: Premix each component separately. Empty Component B (Hardener) in the correct mix ratio into Component A (Resin). Mix the combined components for at least 3 minutes using a low speed drill (300–450 rpm) and Exomixer or Jiffy type paddle suited to the volume of the mixing container to minimize entrapped air. Be careful not to introduce any air bubbles while mixing. Make sure the contents are completely mixed to avoid any weak or partially cured spots in the coating. During the mixing operation, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once to ensure complete mixing.
Self-leveling Slurry: Premix each component separately. Empty Component B (Hardener) in the correct mix ratio into Component A (Resin). Mix the combined components for at least 1 minute using a low speed drill (300–450 rpm) and Exomixer or Jiffy type paddle suited to the volume of the mixing container to minimize entrapped air. Add Sikadur® 504 type filler and mix for additional 2 minutes. Be careful not to introduce any air bubbles while mixing. Make sure the contents are completely mixed to avoid any weak or partially cured spots in the slurry. During the mixing operation, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once to ensure complete mixing.
Do not mix more material than can be applied within the working time limits (i.e. pot life) at the actual field temperature.
APPLICATION
As Primer: Apply primer by squeegee at the rate of 160–200 ft2/US gal (3.4–4.9 m2/L) at 8–10 mils (0.20–0.25 mm) wet film thickness (w.f.t.) and back roll with pressure after 15 minutes. Coverage will vary depending on the porosity of the prepared floor. Product has a limited Pot Life, see Typical Data. Do not apply by dipping roller into mixing container. Pour a bead of product in the form of a ribbon on the surface to be coated, then spread with squeegee and back roll. Ensure that the coating is pore-free and pinhole-free and provides uniform and complete coverage over the entire concrete substrate. If necessary, apply an additional coat to ensure the coating is pore-free and pinhole-free and provides uniform and complete coverage over the entire concrete substrate.
As Wear and Sealer Coat: Sikagard®-664 is applied with a 40 mil (1 mm) notched squeegee over a smooth surface and a flat squeegee over a rough or broadcast quartz surface. Back rolling is typically done with an 18 inch (455 mm) wide 3/8 inch (10 mm) short nap, solvent-resistant roller cover. Back roll the Sikagard®-664 only to level the squeegee applied material. Over-rolling and late back rolling may cause bubbling and leave roller marks.
Smooth Finish Self-Leveling Slurry: Pour a bead of product to the surface to be coated, then spread with a notched squeegee or pin rake to the desired thickness. Roll immediately (within max. 10 minutes of application) in two directions with a spiked roller to ensure even thickness and the removal of entrapped air. To obtain a higher aesthetic finish, spike roll in two directions at a 90 degree angle by passing only once in each direction. The product has a limited Pot Life, see Typical Data.