Sikalastic® Pedestrian Traffic 1500 Low VOC

• UL 790 Class A Fire Rating
• ASTM C 957
• ASTM E 108
• ASTM E 84
• CSA S413

• Sikalastic® M 205
• Sikalastic® TC 235

Sikalastic® Pedestrian Traffic 1500 Low VOC is a moisture-curing polyurethane system.

Allow curing time of 48 hours before pedestrian use. Extend the curing time in cool-weather conditions.

Concrete

1. Concrete must be fully cured (28 days), structurally sound, clean, and dry (ASTM D 4263). All concrete surfaces (new and old) must be shot blasted to remove previous coatings, laitance and all miscellaneous surface contamination and to provide profile for proper adhesion. Abrasive shot blasting must occur after concrete repair has taken place. Acid etching is not permitted. Proper profile should be a minimum of ICRI CSP-3 (as described in ICRI document 03732.)

2. Repair voids and delaminated areas with Sika branded cementitious and epoxy patching materials. For application when fast-turn repairs are required, Sikalastic®-350 can be used to repair patches up to 1.5” in depth when used in aggregate slurry mix. Please refer to the Sikalastic®-350 Technical Data Guide for proper application techniques.

3. All units must be applied within the specified pot life.

Surface Pre-stripping And Detailing

1. For nonmoving joints and cracks less than 1/16" (1.6 mm) wide, apply primer when required, followed by 25 wet mils (0.6 mm) pre-striping of Sikalastic® M 205. Sikalastic® M 205 must be applied to fill and overlap the joint or crack 3" (76 mm) on each side. Feather the edges.

2. Dynamic cracks and joints 1/16" (1.6 mm) and greater wide must be routed to a minimum of ¼" by ¼" (6 by 6 mm) and cleaned. Install bond breaker tape to prevent adhesion of sealants to the bottom of joint. When required, primer all joint faces only with Sika® Primer-173. Fill joints deeper than ¼" (6 mm) with appropriate backer-rod and Sikaflex® SL 1™/ SL 2™ (slope grade or self-leveling) or NP 1™/ SL 2™ sealants). For cracks, sealant should be flush with the adjacent concrete surface. Once the sealant is cured the lines should be prestriped with base coat Sikalastic® M 205 overlap the joint 3" (76 mm) on each side.

3. Sealed joints 1" (25 mm) or less can be coated over with Sikalastic® Pedestrian Traffic 1500 Low VOC. Expansion joints exceeding 1" (25 mm) wide should not be coated over with Sikalastic® Pedestrian Traffic 1500 Low VOC so that they can perform independently of the deck coating system.

4. Where the coating system will be terminated, and no wall, joint, or other appropriate break exists, cut an ¼" x ¼" (6 x 6 mm) keyway into the concrete. Fill and coat keyway during application of Sikalastic® M 205.

5. Form a sealant cant into the corner at the junction of all horizontal and vertical surfaces (wall sections, curbs, columns). Prime with Sika® Primer-173 and apply a 1/2"– 1" (13–25 mm) wide bead of Sikaflex® NP 1 or Sikaflex® NP 2 sealants. Tool to form a 45 degree cant. Apply masking tape to the vertical surfaces 4 – 5" (102–127 mm) above the sealant cant to provide a clean termination of the vertical detail coat. After the sealant has cured, apply 25 mils (0.64 mm) of Sikalastic® M 205 over the cured cant up to the masking tape and 4" (102 mm) onto deck surface.

6. In locations of high movement such as wall and slab intersections, a reinforcing fabric is required. After the sealant cant bead is applied and cured, apply 25 wet mils of Sikalastic® M 205 over the sealant and embed Sikalastic® Fleece-996 reinforcing fabric into the wet detail coat.

 Uncoated Metal Surfaces

Remove dust, debris, and any other contaminants from vent, drain-pipe and post penetrations, reglets and other metal surfaces. Clean surfaces to near white per SSPC-NACE2 and prime immediately with Sika® Primer-173. Provide appropriate cant with Sikaflex® NP 1/NP2. Apply a detail coat of 25 wet mils of Sikalastic® M 205 over the primed metal and sealant.

Plywood

1. All plywood must be smooth-faced, APAstamped and exterior grade tongue and groove. Construction must conform to code, but plywood must not be less than 23⁄32" (20 mm) thick. Plywood spacing and deck construction must follow APA guidelines.

2. Surfaces must be free of contaminants. Priming is not necessary on clean, dry plywood.

3. All seams must be caulked with Sikaflex® NP 1 or Sikaflex® NP 2 sealants. Prestripe 4–6" (102–152 mm) wide with 25 wet mils (0.6 mm) of Base Coat. Reinforce all seams between plywood sheets and between flashing and the plywood deck by embedding Sikalastic® Fleece-996 into the pre-striping.

Please refer to the specific PDS for Mixing instructions.

PRIMER
NOTE: When primer is required on a job, contact your local Sika representative.

Sikalastic® M 205

• All preparatory work must be completed before application begins. Be certain the substrate is clean, dry, stable and properly profiled. Sealants and pre-striping should be properly cured. Apply the base, mid and finish coats with a properly sized squeegee to arrive at the required mil thicknesses.
• Apply Sikalastic® M 205 at 25 wet mils thick (0.64 mm) using a proper notched squeegee to entire deck surface, and back roll, overcoating the properly prepared cracks, joints and flashings. Do not coat expansion joints over 1" (25 mm) wide.
• Allow curing time of overnight (16-hour minimum). Extend the curing time in cool or dry weather conditions. The surface of Sikalastic® M 205 should have a slight tack. If the coating has been exposed for a prolonged period, consult Technical Service for recommendations.

LIGHT TO MEDIUM TRAFFIC SYSTEM AND PEDESTRIAN TRAFFIC SYSTEM

1. Prime substrate if required, consult your Sika Representative
2. Apply 25 (0.64 mm) wet mils of Sikalastic® M 205 using a proper notched squeegee at 55–60 ft²/gal (1.35–1.47 m²/L). Immediately backroll to level base coat. Allow to cure overnight.
3. Apply 25 wet mils (0.64 mm) Sikalastic® TC 235 using a proper notched squeegee at 55–60 ft²/gal (1.35–1.47 m²/L). Immediately backroll to level Sikalastic® TC 225 material.
4. BROADCAST AND BACKROLL METHOD: While the coating is still wet, broadcast 16–30 rounded silica sand at 15–25 lbs/100 ft²/ gal (0.75–1.25 kg/m²), then backroll into the coating to fully encapsulate.
5. When installing the Sikalastic® TC 235 Tint Base, a second coat may be required for proper hiding. A mock-up should be performed 
to address any aesthetic expectations.

IMPORTANT NOTE: All coverage rates are approximate and may vary due to the application technique used. Coverage rates are affected by substrate texture, choice and distribution of aggregate, intermediate coat aggregate load and environmental conditions. Application methods and conditions are not under the control of Sika. Ensure that an adequate amount of aggregate is utilized to achieve desired slip resistance.

MOCKUP

1. Provide mockup of at least 100 ft² (9.3 m²) to include surface profile, sealant joint, crack, flashing and juncture details and allow for evaluation of slip resistance and appearance of Sikalastic® Pedestrian Traffic 1500 Low VOC.
2. Install mockup with specified coating types and with other components noted.
3. Locate where directed by architect.
4. Mockup may remain as part of work if acceptable to architect.  

Clean all tools and equipment immediately after use with SikaSwell® 990 or xylene. Cured material must be removed mechanically.