Sika® Loadflex-524 EZ

Two Component, Semi Rigid, Polyurea Control Joint Filler

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Sika® Loadflex-524 EZ is a technologically advanced, two-component, quick-setting, semi-rigid, solvent-free, self-levelling control joint filler.

Quick-set formula reduces down time.
Material can be shaved off smooth as early as 5 minutes or as late as 24 hours after placement at 73 °F (23 °C).
Cures at temperatures down to -13 °F (-25 °C).
Hard, load-bearing filler designed to withstand industrial traffic.
Provides even load transfer across floor joints, thereby protecting joint edges from breaking down under traffic.
Two components, easy to use, 1:1 mix ratio.
Improved consistency to allow easier dispensing and reduced blockage of equipment.
Seals joints from collecting dirt, dust and debris.
Excellent moisture sensitivity.
For use in Food Plants where floor surfaces must be kept clean.

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Product Data Sheet Show all documents

Usage

Sika® Loadflex-524 EZ is recommended for use as filler for static interior, horizontal saw cuts or preformed control and construction joints.
Typically installed in facilities such as warehouses and industrial plants, where such joints are subject to load-bearing conditions involving wear and impact.
Sika® Loadflex-524 EZ is also used for repairing interior concrete slabs that have experienced random cracking due to shrinkage.

Advantages

Quick-set formula reduces down time.
Material can be shaved off smooth as early as 5 minutes or as late as 24 hours after placement at 73 °F (23 °C).
Cures at temperatures down to -13 °F (-25 °C).
Hard, load-bearing filler designed to withstand industrial traffic.
Provides even load transfer across floor joints, thereby protecting joint edges from breaking down under traffic.
Two components, easy to use, 1:1 mix ratio.
Improved consistency to allow easier dispensing and reduced blockage of equipment.
Seals joints from collecting dirt, dust and debris.
Excellent moisture sensitivity.
For use in Food Plants where floor surfaces must be kept clean.

Packaging

10 US gallon unit (Part A 5 gal; Part B 5 gal)
12 x 20 oz. side-by-side cartridges (10 oz. A; 10 oz. B)

Color

Gray

Product Details

Product Information

Shelf Life

12 months in original, unopened packaging.

Storage Conditions

Store between 59 and 89 °F.

Condition product between 65 and 86 °F before using.

Density

Part A	1.11 g/mL
Part B	1.10 g/mL
Part A+B	1.1 g/mL

Viscosity

Part A 2000-2500 cps
Part B 1000-1600 cps

Technical Information

Shore A Hardness

80-85

(73 °F (23 °C) 50 % R.H.) (ASTM D-2240)

Shore D Hardness

30-32

(73 °F (23 °C) 50 % R.H.) (ASTM D-2240)

Tensile Strength

652 psi

(73 °F (23 °C) 50 % R.H.) (ASTM D-638)

Tensile Adhesion Strength

Bond Strength > 218 psi

Elastic Recovery

Deformation 6.9 NPa (1000 psi) 43.9%

(MIL-D-24613 mod.)

Water Absorption

0.30 %

(ASTM D-570)

Application

Application Information

Mixing Ratio

A:B = 1:1 by volume

Pot Life

20 sec.

73 °F (23 °C) 50 % R.H.

Cure Time

Light traffic	15 min at 73 °F (23 °C) 60 min at -13 °F (-25 °C)
Full traffic	30 min at 73 °F (23 °C) 2 hrs at -13 °F (-25 °C)

Consumption

Coverage

Coverage for 10 gallon kit at joint width of:

Joint Depth/Joint Width	1/8 in (3.8 mm)	1/4 in (6 mm)
1 in (25 mm)	1,540 ft (497 m)	770 ft (248 m)
1 1/4 in (32 mm)	1,232 ft (397 m)	616 ft (199 m)
1 1/2 in (38 mm)	1,027 ft (331 m)	513 ft (166 m)
1 3/4 in (44 mm)	880 ft (284 m)	440 ft (142 m)
2 in (51 mm)	770 ft (248 m)	385 ft (124 m)

Coverage for 20 oz. Cartridge at joint width of:

Joint Depth/Joint Width	1/8 in (3.8 mm)	1/4 in (6 mm)
1 in (25 mm)	24.1 ft (7.8 m)	12 ft (3.9 m)
1 1/4 in (32 mm)	19.3 ft (6.2 m)	9.6 ft (3.1 m)
1 1/2 in (38 mm)	16 ft (5.2 m)	8 ft (2.6 m)
1 3/4 in (44 mm)	13.8 ft (4.4 m)	6.9 ft (2.2 m)
2 in (51 mm)	12 ft (3.9 m)	6 ft (1.9 m)

Note: The above charts are theoretical guides only. Allowance must be made for surface profile, wastage, etc. Sika® Loadflex-524 EZ should be installed to the full depth of the joint.

Application steps

SUBSTRATE PREPARATION

Surface must be clean, sound and dry. Remove all surface contaminants including without limitation contaminants such as dust, grease, curing compounds, impregnations, waxes, foreign particles and disintegrated materials that might prevent bond. Preferred methods of joint cleaning include using a dustless saw with diamond blade, with blade slightly wider than the joint so both sides of joint are cleaned or sand blasting. If unusual conditions are present contact Sika Technical Services.

MIXING

Pre-mix each component thoroughly before using. Sika® Loadflex-524 EZ must be machine mixed / dispensed using a 1 to 1 ratio, plural component pump and 30 element static mixing nozzle. Note: Sika® Loadflex-524 EZ sets too quickly to allow hand mixing.