Sika Corporation -Overlays - Sikadur®-22 Lo-Mod FS

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Low-modulus, fast setting, medium-viscosity, epoxy resin binder

Sikadur®-22 Lo-Mod FS is a 2-component, 100% solids, moisture-tolerant, fast setting epoxy resin binder.



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Overview


Overlays - Sikadur®-22 Lo-Mod FS

Low-modulus, fast setting, medium-viscosity, epoxy resin binder

Sikadur®-22 Lo-Mod FS is a 2-component, 100% solids, moisture-tolerant, fast setting epoxy resin binder. It conforms to the current ASTM C-881, Type III, Grade 1, Class C and AASHTO M-235 specifications.

  • Fast Setting for quick turn around
  • Meets 3 h/1000 psi requirement when mixed as an epoxy mortar
  • Tolerant to moisture both before and after cure
  • Convenient easy mix ratio A:B = 1:1 by volume
  • Excellent strength development
  • Leveling viscosity for easy, efficient application of a broadcast overlay
  • Successfully used in HFST applications. Refer to local DOT specifications for product acceptance

Usage

Use neat as the binder resin for a skid-resistant broadcast overlay. Use also as the binder resin for epoxy mortar and concrete for patching and overlays.

Advantages

  • Fast Setting for quick turn around
  • Meets 3 h/1000 psi requirement when mixed as an epoxy mortar
  • Tolerant to moisture both before and after cure
  • Convenient easy mix ratio A:B = 1:1 by volume
  • Excellent strength development
  • Leveling viscosity for easy, efficient application of a broadcast overlay
  • Successfully used in HFST applications. Refer to local DOT specifications for product acceptance

Packaging

4 gallon (15 L) units / 110 gallon (416 L) unit / 660 (2498 L) gallon totes.

Note: Part A of the Sikadur® 22 Lo-Mod, Sikadur®-22 Lo-Mod FS and Sikadur® 21 Lo-Mod LV is a universal component of these three products.

Color

Clear to light amber

Product Details

Product Information

Chemical Base

Epoxy Resin

Shelf Life

24 months in original, unopened containers

Storage Conditions

Store dry at 40-95 °F (4-35 °C)

Condition material at 65-85 °F (18-29 °C) before using.

Volatile organic compound (VOC) content

<20 g/L

Viscosity

Approximately 2,000 cps

Application

Application Information

Mixing Ratio

Component ‘A’: Component ‘B’ = 1:1 by volume.

Consumption

Coverage

1 gal. yields 231 in3

Mortar Binder - 1 gal. of mixed Sikadur® 22 Lo-Mod FS with the addition of 5 gal. by loose volume of an oven dried sand, yields approximately 808 cu. in. of epoxy mortar

Application Steps

SUBSTRATE PREPARATION

Surface must be clean and sound. It may be dry or damp, but free of standing water. Remove dust, laitance, grease, curing compounds, impregnations, waxes and any other contaminants.

Preparation Work: Concrete - Should be cleaned and prepared to achieve a laitance and contaminant free, open textured surface by blast cleaning or equivalent mechanical means.

Steel - Should be cleaned and prepared thoroughly by blast cleaning towhite metal finish.

MIXING

Mixing Pre-mix each component. Proportion equal parts by volume of Component ‘A’ and ‘B’ into clean pail. Mix thoroughly for 3 min. with Sika paddle on low-speed (400-600 rpm) drill until uniformly blended. Mix only that quantity that can be used within pot life.

To prepare epoxy mortar - Slowly add 5 parts by loose volume of oven-dried sand to 1 part mixed resin.


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Specifications

Abrasion Resistance
Mortar 1:3Neat
14 day, Weight loss, 1,000 cycles*2.0 grams

0.030 grams

* (H-22 wheel; 1,000 gm weight for mortar/ C-17 wheel, 1,000 gm wt for neat)

Compressive Strength
40 °F(4 °C)73 °F (23 °C) 90 °F (32 °C)
3 hours-1750 psi

3600 psi

8 hours2000 psi

4400 psi

6400 psi

1 day4500 psi6500 psi8000 psi
3 days5500 psi7500 psi8500 psi
7 days8500 psi8500 psi9000 psi
14 days9000 psi9000 psi9000 psi
28 days9000 psi9000 psi9000 psi

Material cured and tested at the temperatures indicated and 50 % R.H.

Modulus of Elasticity in Compression

7 days

40,000 psi

28 days

40,000 psi

Pot Life

Approximately 15-20 minutes

(60 gram mass; ASTM C-881)

Rapid Chloride Permeability

0 coulombs

(AASHTO T-277)

Shear Strength
Mortar 1:3Neat
7 day

2600 psi

3430 psi

Shore D Hardness

72

(ASTM D-2240)

73 °F (23 °C)

50 % R.H.

Tensile Adhesion Strength
Mortar 1:3Neat
1 day-

> 550 psi

(concrete failure)

7 days-

> 570 psi

(concrete failure)

Tensile Strength
Mortar 1:3Neat
7 day

1200 psi

2650 psi

Thermal Compatibility

Pass

(ASTM C-884)

Waiting / Recoat Times

60-64 °F

(16-18 °C)

65-69 °F

(19-21 °C)

70-74 °F

(21-23 °C)

Coat 14-4 ½ h2 ½-3 h2-2 ½ h
Coat 25 ½-6 h4 ½-5 h4 h

75-79 °F

(24-26 °C)

80-84 °F

(27-29 °C)

85+ °F

(29+ °C)

Coat 12 h1.5 h1 h
Coat 23 h3 h2 ½-3 h

Average Substrate and Material Temperature. These set times were determined under laboratory conditions, actual set times may vary based on on-site conditions

Water Absorption
Mortar 1:3Neat

7 day

(24 hour immersion)

-< 0.20 %