Sikalastic®-350

• ASTM C 881

Sikalastic®-350 is a two-component epoxy-based binder.

2 years when properly stored

Store in unopened containers at 60– 80 °F (16–27 °C) in clean, dry conditions.

Abrasion - Taber

Mixed with Aggregate

Modulus of Elasticity in Compression

Tensile elongation
 

Adhesion Pull Test
 

Thermal compatibility

1 to 1, by volume

• Parking Decks: 40 - 60 ft² /gallon (1.0 - 1.5 m² /L), depending on porosity and profile of substrate
• Bridge Decks: 20 - 40 ft² /gallon (0.5 - 1.0 m² /L), depending on porosity and profile of substrate
• 80 ft² /gallon (1.96 m² /L) as a primer for epoxy binder
• Binder yield varies depending on mix ratio (aggregate to epoxy) and aggregate size and gradation.
• Mortar Mix Yield: A ratio of 3 GAL Sand + 1 GAL mixed Sikalastic®-350 = 2.8 GAL mortar mix (650 in³ )

Uncoated Metal Surfaces
Remove dust, debris and any other contaminants from vent, drain pipe and post penetrations, reglets and other metal surfaces. Clean surfaces to near white per SSPC-NACE2.

Concrete

• Concrete must be fully cured (28 days), structurally sound, clean and dry (ASTM D 4263). All concrete surfaces (new and old) must be shot blasted to remove previous coatings, laitance and all miscellaneous surface contamination and to provide profile for proper adhesion. Abrasive shot blasting must occur after concrete repair has taken place. Acid-etching is not permitted. Proper profile should be a minimum of ICRI CSP-5 (as described in ICRI document 03732.)
• Repair voids and delaminated areas with Sika branded cementicious and epoxy patching materials. For application when fast-turn repairs are required, Sikalastic®-350 can be used to repair patches up to 1.5" in depth when used in aggregate slurry mix.
• All units must be applied within the specified pot life.

1. Thoroughly mix each separate component for 2–3 minutes.
2. Mix Part A (resin) and Part B (hardener) in the proper ratio (1:1 by volume), using a slow-speed drill (500 rpm) and paddle for 2–3 minutes.
3. Because of the quick cure rate of this product, do not mix more material than can be applied within the pot life of 15–25 minutes at 75˚F (24˚C). Elevated temperatures decrease pot life, and reduced temperatures increase pot life.
4. The maximum recoat window for additional coats of Sikalastic®-350 is 24 hours.

Broadcast-Aggregate Method

Parking Decks

1. Spread the mixed Sikalastic®-350 onto the substrate with a notched squeegee at a rate of 60 ft² /gallon (1.0 m² /L). Place the epoxy to permit a continuous operation by applying the second mix immediately behind the first mix.
2. Begin the aggregate broadcast immediately, but stop to maintain a wet edge. Broadcast aggregate to complete saturation (approximately 1.1 lb/ft² (5.4 kg/m² ). If wet spots develop, immediately broadcast additional aggregate until a dry surface is reestablished.
3. Apply the second coat in the same manner described above at a rate of 40–60 ft² /gal. The maximum recoat window is 24 hours.

Bridge Decks

1. Spread the mixed Sikalastic®-350 onto the substrate with a notched squeegee at a rate of 40 ft² /gal (1.0 m² /L) or 2.5 gallons per 100 ft². Place the epoxy to permit a continuous operation by applying the second mix immediately behind the first mix.
2. Begin the aggregate broadcast immediately, but stop to maintain a wet edge. Broadcast aggregate to complete saturation (approximately 1.1 lb/ft² (5.4 kg/m² ). If wet spots develop, immediately broadcast additional aggregate until a dry surface is reestablished.
3. Apply the second coat in the same matter but at a rate of 20 ft² /gal (.05 m² /L) or 80 mils. The maximum recoat window is 24 hours.

Epoxy Mortar

1. Mix the two components of Sikalastic®-350 using the recommended procedures under the Mixing section.
2. Slowly add up to five parts by volume of oven-dried sand to one part of mixed epoxy.
3. For larger applications, a paddle-type (mortar) mixer may be used. However, the A and B components must first be mixed together using a slow-speed drill as outlined previously.
4. Prime the area to receive the epoxy mortar using neat resin (parts A and B mixed but with no aggregate). Some applications, e.g., paving dams, will require forming to prevent the material from slumping into the joint.
5. Place the epoxy mortar into the repair area and level with a trowel or float. Excess working of the surface will bring resin to the top, which will create a slick finish when cured. To prevent this, broadcast aggregate to refusal onto leveled surface.
6. Allow time for sufficient curing before removing forms, if applicable.
7. When using the Sikalastic®-350 as a binder in this method, the mortar should be placed at no more than 1½" maximum depth.
8. Allow a minimum cure time of 6 hrs at 70˚F (21˚C). for Sikalastic®-350 before allowing vehicular traffic.
   
    

Aggregate

An angular-shaped silica or basalt aggregate may be used. The aggregate shall be an angular-shaped silica with Mohs scale hardness of 7 or greater or basalt with a hardness of 6 or greater. The alternate aggregate must be clean, dry (less than 0.2% moisture), and conform to the following gradation.

PERCENT, BY WEIGHT, PASSING IN INDICATED U.S. STANDARD-SIEVE SERIES

Coarse Aggregate

Cleanup tools with xylene immediately after use.