Sikadur®-25 Lo-Mod EPU

Sikadur® 25 Lo-Mod is a 2-component, 100 % solids, moisture-tolerant, low viscosity, epoxy-urethane resin binder

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Sikadur®-25 Lo-Mod EPU is a 2-component, 100 % solids, moisture-tolerant, low viscosity, epoxy-urethane resin binder. It conforms to the current ASTM C-881, Type III, Grade 1, Class-C specifications.

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.

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Product Data Sheet Show all documents

Usage

Use neat as the binder resin for a skid-resistant broadcast overlay.

Advantages

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.

Packaging

110 gallon units (drums); 660 gal units (totes)

Color

Light Blue

Product Details

Product Information

Shelf Life

2 years in original, unopened containers.

Storage Conditions

Store dry at 40–95 °F (4–35 °C).
Condition Material 65–85 °F (18–29 °C) before using.

Viscosity

Approximately 2,000–2,500 cps.

Technical Information

Shore A Hardness

	Mortar 1:3	Neat
-	-	72

Compressive Strength

	40 °F (4 °C)	73 °F (23 °C)	90 °F (32 °C)
3 hours		800 psi	3,600 psi
8 hours	2,000 psi	2,000 psi	6,400 psi
1 day	4,500 psi	5,000 psi	8,000 psi
3 days	5,500 psi	7,500 psi	8,500 psi
7 days	8,500 psi	8,500 psi	9,000 psi
14 days	9,000 psi	9,000 psi	9,000 psi
28 days	9,000 psi	9,000 psi	9,000 psi

Modulus of Elasticity in Compression

7 days	40,000 psi
28 days	40,000 psi

Flexural Strength

	Mortar 1:3	Neat
7 days	-	>5,000 psi psi (34.5 MPa)

Tensile Strength

	Mortar 1:3	Neat
7 days	-	> 3,500 psi (20.7 MPa)

Tensile Adhesion Strength

	Mortar 1:3	Neat
1 day	> 550 psi (concrete failure)	-

Abrasion Resistance

Mortar 1:3

Neat

14 days

2.0 gm

H-22 wheel; 1,000 gm weight

0.030 gm

C-17 wheel; 1,000 gm weight

Water Absorption

	Mortar 1:3	Neat
7 days	-	< 0.20 %

Application

Application Information

Mixing Ratio

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

Pot Life

Approximately 15–20 minutes (60 gram mass; ASTM C881).

Cure Time

	40 °F (4 °C)	73 °F (23 °C)	90 °F (32 °C)
Tack-Free Time	8 hours	2.5–3 hours	2 hours
Traffic Time	24 hours	3.5 hours	2.5 hours

Consumption

Coverage

1 gal. yields 231 cu. in.
Mortar Binder - 1 gal. of mixed Sikadur®-25 Lo-Mod EPU 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 or equivalent mechanical means to white metal finish.

MIXING

Pre-mix each component. Take care as premixing of unfilled resins may entrain excessive air. 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 of mixed Sikadur®-25 Lo-Mod EPU until uniform in consistency.