Series N242
Ultra-Tread S
Generic Type
Polyurethane Modified Concrete
Common Usage
Series N242 is a low-odor, slurry-applied, flowable mortar floor topping designed for monolithic applications in abusive service areas. It provides superior performance to other flooring systems such as acid brick, quarry tile, and most polymer flooring systems. Designed for use in food and beverage facilities, pharmaceutical and processing areas, commercial and restaurant kitchens, or anywhere a durable floor topping is required. Provides excellent chemical resistance and withstands thermal shock due to hot liquids and aggressive cleaning procedures. Areas may be quickly returned to service within hours of installation, depending on temperature and humidity. Series N242 is a self-priming base coat that can be applied to 10-day-old concrete. It can withstand moisture vapor transmission up to 20 lbs (per ASTM F 1869) and relative humidity up to 99% (per ASTM F 2170). Series N242 replaces Series 245.
Special Qualifications
Series N242 is formulated using a Phthalate and Phenol Free Bio-Based Environmentally Friendly Polyol. It meets requirements for use in USDA and FDA-regulated facilities. Formulated with antimicrobial properties. Does not support bacteria or fungal growth. Contact your Tnemec representative for specific test results.
Series N242 was tested in accordance with, and passed, the California Dept. of Public Health (CDPH) Standard Method v1.2 and meets the requirements of LEED v4.1 Low-Emitting Materials, Collaborative for High-Performance Schools-Paints & Coatings, Living Building Challenge Materials Petal 10, and WELL Building Standard v2 X06 VOC Restrictions.
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Surfacer/Filler/Patcher
Series N242 (extended with aggregate) or Series N243, N244. Patching should be broadcasted to refusal with aggregate or re-prepared after being allowed to cure a minimum of six hours prior to placement of Series N242 to avoid blistering or doming. Series 215, 217, N218, or 201 or 208 mixed with fumed silica, may be used for small patches or crack repairs. Certain high-early strength, cementitious repair mortars are also acceptable. Contact Tnemec for further qualifications.
Recommended DFT
1/8" to ¼” (3 mm to 6 mm). Series N242 can be applied as a stand-alone mortar (neat) at 1/8" to 1/4" (3 mm to 6mm). Broadcasting with aggregate to refusal at 1/8" neat will yield a total thickness 3/16" (5 mm), at 3/16" (5 mm) neat will yield a total thickness 1/4" (6 mm), at 3/16" (5 mm) neat will yield a total thickness 5/16" (8 mm). Important: Series N242 should not exceed 1/2" (13 mm) thickness when applied neat. Refer to the coverage rates table for more information. Note: Exceeding the recommended coating thickness may result in blistering of the product. Avoid excessive coating thickness by thoroughly filling voids, depressions and cracks with recommended filler or surfacer prior to Series N242 application.
Primers
Self-priming
Finish
Matte/Flat
Volume Solids
100% (mixed)
Volatile Organic Compounds
Unthinned: 0.06 lbs/gallon (8 grams/litre)
Theoretical Coverage
49 sq ft per small kit at 1/8" 34 sq ft per small kit at 3/16”
Number of Components
Three—Liquids: Part A & Part B, Aggregate: Part C
Intermediate
Series N222, N223, N224, 233, 237, 237SC, 238, 239, 239SC, 247, 248, 252SC, 256, 257, 280, 280FC, 281, 282, 286. Note: Series N242 must be broadcast to refusal with aggregate, colored quartz, or decorative flake if topcoating. Broadcast aggregate or colored quartz at an approximate rate of 0.8 lb per sq ft and decorative flake at an approximate rate of 0.25 lb per sq ft or 4 to 5 sq ft per pound. The Series N242 base coat will account for approximately 3/16"-5/16" of the desired system thickness.
Topcoats
Series N222, 230ESD, 233, 237, 238, 239, N246, 247, 248, 249ESD, 252SC, 256, 257, 280, 280FC, 281, 282, N284, N285, 286, V290, V291, 296, 297. Note: These topcoats may only be used when recommended aggregate, colored quartz, or decorative flake has been broadcast to refusal into the wet Series N242 or the cured surface of the Series N242 has been cleaned and thoroughly abraded by grinding prior to topcoating. Note: If Series 247, 248, 249ESD, V290, V291, or 297 is selected for the finish coat over a broadcast system, a grout coat of Series N222, 233, 237, 238, 256, 257, 280, 281, or N284 is required.
Curing Time
| Temperature | Min. Recoat | Light Traffic | Place In Service † |
|---|---|---|---|
| 75°F (24°C) | 6 hours | 8 hours | 12 hours |
† For full resistance to chemicals and steam cleaning, 24 hour cure is needed.
Curing time varies with surface temperature, air movement, humidity and film thickness. Note: For faster curing and low temperature applications, add No. 44-714 Ultra-Tread Accelerator, see separate product data sheet for cure information.
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