Sika Level-425 Dust reduced, cementitious, self-leveling underlayment

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Sika Level-425 Dust reduced, cementitious, self-leveling underlayment
Categories:	Ceramic; Concrete
Material Notes:	Sika® Level-425 is a one-component, durable and versatile cementitious underlayment for interior concrete and cementitious substrates. It can be applied manually or by pump to produce a self-smoothing, rapid-setting, and flat substrate prior to the application of a final floor finish. Typical application thickness is 1/16” to 1/2” (1.5 to 12.7 mm), or up to 1” with aggregate. Where to Use: Concrete Cement substrates Rapid drying cement screed systems OSB/Plywood only suitable for flexible coverings Ceramic tiles, terrazzo or natural stones Old water-resistant adhesive residues Advantages: Dust reduced For interior use only Self-leveling High strength Compatible with subfloor heating systems Manual or pumpable applications Very low shrinkage Can accept caster wheel loading if the thickness is greater than 1/8’’ Low porosity surface Information provided by Sika Corporation.
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Physical Properties	Metric	English	Comments

Density	1.89 g/cc	0.0683 lb/in³
Volatile Organic Compounds (VOC) Content	0.00 g/l	0.00 g/l	EPA method 24

Mechanical Properties	Metric	English	Comments
Flexural Strength	6.89 MPa @Time 2.42e+6 sec	1000 psi @Time 672 hour	ASTM C348
Compressive Strength	13.8 MPa @Time 86400 sec	2000 psi @Time 24.0 hour	ASTM C109
	29.0 MPa @Time 605000 sec	4200 psi @Time 168 hour	ASTM C109
	38.6 MPa @Time 2.42e+6 sec	5600 psi @Time 672 hour	ASTM C109

Processing Properties	Metric	English	Comments
Cure Time	70.0 - 80.0 min	1.17 - 1.33 hour	Initial set; ASTM C191
	80.0 - 100 min	1.33 - 1.67 hour	Final set; ASTM C191
	180 min	3.00 hour	Ready for Foot Traffic
	180 min	3.00 hour	Ready for Tiles or Stone
	960 min	16.0 hour	Ready for Floor Covering
Working Life	30.0 min	30.0 min
Shelf Life	12.0 Month @Temperature 5.00 - 30.0 °C	12.0 Month @Temperature 41.0 - 86.0 °F	in original unopened cartridge

Descriptive Properties
Color	Concrete gray

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PSIKA911 / 209818

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