Polyurethane - 1 Component Pedestrian Traffic Coatings - Sikalastic®-715 LoVOC Traffic System

Single component, single product, low VOC, elastomeric, crack-bridging, waterproofing traffic system

Sikalastic®-715 LoVOC Traffic System is a single component, single product, aromatic, low VOC, moisture cured, elastomeric polyurethane coating system designed for use as a waterproofing membrane for pedestrian and vehicular traffic bearing surfaces. Booster provides fast-cure performance similar to two-component products.
System components are:
Sikalastic® Primer (see separate data sheet)
Sikalastic® FTP Lo-VOC primer (see separate data sheet)
Sikalastic® PF Lo-VOC primer (see separate data sheet)
Sikalastic® MT primer (moisture-tolerant primer - see separate data sheet)
Sikalastic® 715 Top Lo-VOC one-component aromatic polyurethane base and top coat with Booster (suitable for UV exposure)

• Fast turnaround with Booster
• Excellent crack-bridging properties and flexibility, even at low temperatures
• Outstanding resistance to abrasion and wear
• Impervious to water and deicing salts
• Range of standard colors

Usage

Sikalastic®-715 LoVOC Traffic System is suitable for use on structurally sound concrete, cementitious or plywood surfaces exposed to vehicular or pedestrian traffic.

• Multi-story parking garages
• Parking decks and ramps
• Foot bridges and walkways
• Mechanical rooms
• Stadiums and arenas
• Plaza and rooftop decks
• Balconies

Advantages

• Fast turnaround with Booster
• Excellent crack-bridging properties and flexibility, even at low temperatures
• Outstanding resistance to abrasion and wear
• Impervious to water and deicing salts
• Range of standard colors

Packaging

715 Top Lo-VOC: 4.75 gal. (net) pails, 50 gal. (net) drums
715 Top Lo-VOC Booster: 1 quart cans (4 cans per carton)

Colour

Sikalastic® 715 Top Lo-VOC: Gray, Charcoal and Tan

System Structure

System Details

System Information

Shelf Life

1 year in original, unopened containers

Storage Conditions

Store dry at 40-95 °F (4-35 °C).
Condition material to 65-85 °F (18-30 °C) before using.

Application

Application Consumption

Coverage

Coverage rates provided in System Structure are intended to achieve required wet film thickness under optimal conditions. Additional material may be required depending on substrate surface roughness and porosity, material and substrate temperatures, and other site-dependent factors. This will result in a lower coverage rate. See Sikalastic® Aliphatic Decorative Top Coats data sheet for decorative quartz/flake systems.

Application Steps

SUBSTRATE PREPARATION

Surface must be clean, dry and sound with an open texture. Remove dust, laitance, grease, curing compounds, bond inhibiting impregnations, waxes, and any other contaminants. All projections, rough spots, etc. should be dressed off to achieve a level surface prior to application.
Concrete - Should be cleaned and prepared to achieve a laitance and contaminant free, open textured surface by blast cleaning or equivalent mechanical means (CSP 3-4 per ICRI guidelines). Route out all cracks and joints as part of surface preparation.
Plywood - Should be clean and smooth, APA and exterior grade, not less than 1/2” thick, and spaced and supported according to APA guidelines. Seams should be sealed with Sikaflex 2c or 1a and detailed and may need embedded fabric reinforcement.
Metal - Should be thoroughly cleaned by grinding or blast cleaning to near white metal (SSPC SPS-10).

APPLICATION

Priming

Primer Selection - Determine maximum moisture content of concrete substrate by weight with a Tramex CME or CMExpert type concrete moisture meter.

Sikalastic® Primer - For concrete decks with a maximum moisture content of 4 % by weight, and for plywood decks, apply Sikalastic® Primer with a flat squeegee or phenolic resin core roller at approximately 300 sf/gal. and work well into the substrate to ensure adequate penetration and sealing, and puddles are avoided.

Sikalastic® FTP Primer - For concrete decks with a maximum moisture content of 4 % by weight, and for plywood decks, apply Sikalastic® FTP Primer with a flat squeegee or phenolic resin core roller at approximately 300 sf/gal. and work well into the substrate to ensure adequate penetration and sealing, and puddles are avoided

Sikalastic® FTP Lo-VOC Primer - For exterior exposed concrete decks with a max moisture content of 4 % by weight, interior protected concrete decks with a maximum moisture content of 5 % by weight, and plywood decks, apply Sikalastic® FTP Lo-VOC Primer with a flat squeegee or phenolic resin core roller at approximately 300 sf/gal. and work well into the substrate to ensure adequate penetration and sealing, and puddles are avoided. For exterior exposed concrete decks with a maximum moisture content of 5 % by weight, two applications of Sikalastic® FTP Lo-VOC Primer are required. Sikalastic® FTP Lo-VOC Primer is not suitable for metal substrates. Refer to separate primer data sheet for additional information.

Sikalastic® PF Lo-VOC Primer - For concrete and plywood decks with a porous or rough surface, and for metal flanges and penetrations, use Sikalastic® PF Lo-VOC Primer. For exterior exposed concrete decks with a maximum moisture content of 4 % by weight, interior protected concrete decks with a maximum moisture content of 5 % by weight, and plywood decks, apply Sikalastic® PF Lo-VOC Primer with a flat squeegee or phenolic resin core roller at approximately 200 sf/gal. and work well into the substrate to ensure adequate penetration and sealing, and puddles are avoided. For exterior exposed concrete decks with a maximum moisture content of 5 % by weight, two applications of Sikalastic® PF Lo-VOC Primer are required. Refer to separate primer data sheet for additional information.

Sikalastic® MT Primer - For concrete with a maximum moisture content of 5 % by weight, and for metal flanges and penetrations, apply Sikalastic® MT Primer with a flat squeegee or roller at approximately 175 sf/gal. For concrete decks with a maximum moisture content of 6 % by weight, apply two applications of Sikalastic® MT Primer with a flat squeegee or phenolic resin roller at approximately 175 sf/gal per application. Work primer well into the substrate to ensure adequate penetration and sealing, and puddles are avoided. Refer to separate primer data sheet for additional information.

Sikalastic® Recoat Primer - For existing polyurethane coatings, incidental exposed concrete deck areas, and as an interlaminate primer, apply Sikalastic® Recoat Primer with a flat squeegee or phenolic resin core roller at approximately 300 sf/gal. and work will into the substrate to ensure adequate penetration and sealing, and puddles are avoided. Sikalastic® Recoat Primer is not suitable for metal substrates. Refer to separate primer data sheet for additional information.

Detailing

Non-structural cracks up to 1/16 inch - Apply a detail coat of Sikalastic® 715 Lo-VOC Top with Sikalastic® 715 Lo-VOC Booster at 26 wet mils, 4” wide, centered over the crack. Allow to become tack free before overcoating.

Cracks and joints over 1/16 up to 1 inch - Seal First - Seal previously routed cracks and joints with Sika sealant (see Sealant Guide), and allow to skin over and cure for 24 hours min. Alternatively, seal previously routed cracks and joints with 150 LM and allow to skin over and cure for 1 hour min. Apply Sikalastic® Primer over the entire deck, including sealed cracks and joints, and allow to become tack free. Apply a detail coat of Sikalastic® 715 Lo-VOC Top with Sikalastic® 715 Lo-VOC Booster at 26 wet mils, 4” wide, centered over the crack. Allow to become tack free before overcoating.

Cracks and joints over 1/16 up to 1 inch - Prime First - Apply Sikalastic Primer over the entire deck, including previously routed cracks and joints, and allow to become tack free. Seal cracks and joints with Sika sealant (see Sealant Guide) and allow to skin over and cure for 24 hours min. Apply a detail coat of Sikalastic® 715 Lo-VOC Top with Sikalastic 715 Lo-VOC Booster at 26 wet mils, 4” wide, centered over the crack. Allow to become tack free before overcoating.
Fabric Reinforcement - An optional 3” or 6” wide Sikalastic® Flexitape Heavy fabric strip may be embedded within the base coat. Flexitape width shall be chosen such that a minimum of 1” tape is embedded on either side of the crack/joint. Apply additional coating as required to fully embed the Flexitape in the coating.

Joints over 1 inch - Should be treated as expansion joints and brought up through the Sikalastic Traffic System and sealed with Sika sealant (see Sealant Guide).
Panelized Joints - Panelized joints that are restrained across the joint and without differential movement may be sealed and the deck coating, including detail coat, applied over the joint.

NOTE: movement within panelized joints may cause deterioration of the aggregated wear coat, in which case the joints should be treated as expansion joints and brought up through the Sikalastic® Traffic System and sealed with Sika sealant (see Sealant Guide).

Base Coat
Thoroughly mix Sikalastic® 715 Top Lo-VOC using a low speed (400-600 rpm) drill with mechanical mixer (Jiffy) at slow speed until a homogenous mixture and color is obtained. Add Sikalastic® 715 Top Lo-VOC Booster into premixed coating and continue mixing until homogenous mixture and color is obtained (typically 3 minutes). Use care not to allow the entrapment of air into the mixture. Apply at the recommended coverage rate (see System Guide) using a 1/4” notched squeegee or trowel and backroll using a phenolic resin core roller. Extend base coat over entire area including previously detailed cracks and control joints. Allow coating to cure a minimum of 6 hours at 70 °F and 50 % RH or until tack free before top coating.

Top Coats
Thoroughly mix Sikalastic® 715 Top Lo-VOC using a low speed (400-600 rpm) drill with mechanical mixer (Jiffy) at slow speed until a homogenous mixture and color is obtained. Add Sikalastic® 715 Top Lo-VOC Booster (if required) into premixed coating and continue mixing until homogenous mixture and color is obtained (typically 3 minutes). Add a maximum of 1 quart to 4.75 gallons (or 1:19 ratio) and only to material that will be applied in the next hour. Use care not to allow the entrapment of air into the mixture. Apply at the recommended coverage rate (see System Guide) using a 3/16” notched squeegee or trowel, or phenolic resin core roller, and backroll. Apply aggregate evenly distributed at the appropriate rate immediately into wet coating and backroll if required (see System Guide). Allow coating to cure a minimum of 16 hours (6 hours with Booster) 70 degrees F and 50 % RH or until tack free between coats, and a minimum of 72 hours (36 hours with Booster) before opening to vehicular traffic.

Aggregate
Use clean, rounded, oven dried quartz sand with a minimum gradation of 16-30 mesh for vehicular traffic and 20-40 mesh for pedestrian traffic, and a minimum hardness of 6.5 per the Moh’s scale. It should be supplied in pre-packaged bags and free of metallic or other impurities. Seeding of aggregate means and even, light broadcast short of to refusal. Any loose aggregate must be removed prior to recoating. Backroll aggregate only where indicated.

Boosters
Sikalastic® 715 Top Lo-VOC Booster may be added to Sikalastic® 715 Lo-VOC Top in order to speed cure time. The use of Sikalastic® 715 Top Lo-VOC Booster is required for all Sikalastic® 715 Top Lo-VOC applications exceeding 19 wet mils including use as Base Coat. Mix thoroughly prior to application. Add a maximum of 1 quart to 4.75 gallons (or 1:19 ratio) and only to material that will be applied within 45 minutes typical.

Recoat Windows

In the event of an unforeseen rain event or delays beyond the stated recoat window referenced in each product’s current PDS, observe the following.

Removal

Remove liquid resin immediately with dry cloth. Once cured, resin can only be removed by mechanical means.

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