Overlays - Sikadur®-27 Lo-Mod

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

Sikadur®-27 Lo-Mod is a 2-component, 100 % solids, moisture-tolerant, fast setting epoxy resin binder. It conforms to the current ASTM C-881 and AASHTO M-235 specifications.

• Fast setting for quick turnaround.
• 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 specs. for product acceptance.
• Epoxide Equivalent Weight (ASTM D-1652) < 200

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 turnaround.
• 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 specs. for product acceptance.
• Epoxide Equivalent Weight (ASTM D-1652) < 200

Packaging

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

Note: Part B of the Sikadur® 27 Lo-Mod and Sikadur® 22 Lo-Mod FS is a universal component of these two products.

Product Details

Product Information

Chemical Base

Epoxy Resin

Shelf Life

2 years in original, unopened containers

Storage Conditions

Store dry at 40°-95°F (4°-35°C)

Application

Application Information

Open Time

15-45 minutes (ASTM C-881)

Consumption

Coverage

1 gal. yields 231 in³

Mortar Binder - 1 gal. of mixed Sikadur®-27 Lo-Mod 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 to white metal finish.

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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