Sikalastic® Vehicular Traffic 2575

• CSA S413
• ASTM C 957

• Sikalastic® M 270 NP
• Sikalastic® TC 275
• Sikalastic® TC 295

100% Solids

Allow curing time of 24 hours before vehicular and 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.) For balconies and other pedestrian areas with limited space or access for shot-blasting, alternative mechanical methods can be used to achieve the recommended surface profile. 

2. Repair voids and delaminated areas with Sika branded cementitious and epoxy patching materials. For application when fastturn 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 product Data sheet for proper application techniques. 

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

Surface Pre-Striping and Detailing

1. For non-moving joints and cracks less than 1⁄16" (1.6 mm) wide, apply 25 wet mils (0.6 mm) prestriping of Sikalastic® M 270 NP. Sikalastic® M 270 NP 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 over 1⁄16" (1.6 mm) wide must be routed to a minimum of ¼ by ¼" (6 by 6 mm) and cleaned. Install bond breaker tape to prevent adhesion to bottom of joint. Fill joints deeper than ¼" (6 mm) with appropriate backer rod and Sikaflex® SL 1™/ SL 2™ (slope grade or selfleveling) or Sikaflex® NP 1™/ NP 2™. For cracks, sealant should be flush with the adjacent surface. For expansion joints, sealant should be slightly concave. After the sealant has cured, apply 25–30 wet mils (0.64–0.77 mm) of Sikalastic® M 270 NP pre-stripping over the cured sealant, overlap the joint 3" (76 mm) on each side.

3. Sealed joints 1" (25 mm) wide or less can be coated over with the Sikalastic® Traffic system. Expansion joints exceeding 1" (25 mm) wide, including the primary wide expansion-joint system, are not to be coated so they can perform independently of the deck coating system.

4. Form a sealant cant into the corner at the junction of all horizontal and vertical surfaces (wall sections, curbs, columns) applying a 1" (25 mm) wide bead of Sikaflex® NP 1™/ NP 2™. Tool to form a 45° 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 wet mils (0.64 mm) of Sikalastic® M 270 NP over the cured cant up to the masking tape and 4" (102 mm) onto deck surface. 

5. Where the coating system will be terminated and no wall, joint, or other appropriate break exists, cut a ¼ by ¼" (6 by 6 mm) keyway into the concrete. Fill and coat keyway during application of Sikalastic® M 270 NP.

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 270 NP over the sealant and embed Sikalastic® Fleece-996 or Sika® Flexitape Heavy reinforcing fabric into the wet detail coat. 

Uncoated Metal Surfaces

1. 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 with appropriate primer for Sikaflex sealant. Provide appropriate cant with Sikaflex® NP 1™/ NP 2™ sealants to eliminate 90° angles.

Please refer to the specific PDS for Mixing instructions

SIKALASTIC® VEHICULAR TRAFFIC

1. Prime substrate if required

2. Apply 25 wet mils (0.63 mm) of Sikalastic® M 270 NP with a proper notched squeegee  at the rate of approximately 55–60 ft² /gal  (1.35– 1.47 m² /L). Immediately backroll to level base coat. Allow base coat to cure 3–4 hours.

3. Apply 15–20 wet mils (0.38–0.51 mm) of Sikalastic® 275 intermediate top coat using a properly notched squeegee at the rate of approximately 80–100 ft² /gal (1.96-2.45 m² /L). Immediately backroll to evenly level topcoat. Utilize the aggregate to refusal method  described in step 4A or broadcast and backroll method in 4B next. 

4. AGGREGATE

4A. AGGREGATE TO REFUSAL METHOD - Immediately broadcast aggregate 16–30 or equivalent rounded silica sand into the wet coating at the rate of 20–35 lbs/100 ft² (1.0–1.75 kg/m² ). Immediately after the aggregate broadcast and while the coating is still wet, blow any excess aggregate via a portable blower forward into the wet coating. Do not over apply aggregate; it is acceptable to have localized wet spots in the aggregate surface after completion of this method. This process requires coordination between all members in the work crew. The blower operator, wearing clean spiked shoes, should blow the excess aggregate forward towards the freshly applied and backrolled topcoat. In this method, the coating should not accept additional sand, minimal excess aggregate is on the surface, less aggregate is used and the textured appearance should be fairly uniform. 

4B. BROADCAST AND BACKROLL METHOD - Immediately broadcast aggregate 16–30 or equivalent rounded silica sand into the wet coating and backroll to encapsulate the aggregate. Evenly broadcast aggregate at the rate of 15–25 lbs/100 ft² /gal (0.75–1.25 kg/m² ). 

5. Remove all excess or loose aggregate by sweeping or vacuuming.

6. Ensure there is no moisture on the surface of the aggregate/membrane before application of next coat. 

7. Apply the second intermediate coat of Sikalastic® TC 275 at 20–25 wet mils (0.51–0.63 mm) at the rate of 60–80 ft² /gal (1.96–2.45 m² /L) repeating steps 4 through 6. The next step 4, can utilize either method described in 4A or 4B. 

8. Apply 20–25 wet mils (0.51–0.63 mm) of Sikalastic® TC 295 at a rate of 60–80 ft² /gal (1.96–2.45 m² /L) using a flat squeegee. 

9. Immediately backroll to evenly level topcoat. 

10. Immediately broadcast aggregate 16–30 or equivalent rounded silica sand at the rate of 3–5 lbs/100 ft² (0.15–0.25 kg/m² ). Lightly backroll into top coat. 

11. Allow minimum curing time of 24–48 hours before allowing vehicular traffic onto the coating. Existing environmental conditions effect the allowable time period.

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 aggregate load and environmental conditions and application  methods and are not under the control of Sika. Ensure that an adequate amount of aggregate is utilized to achieve required slip resistance. Exterior applications must utilize Sikalastic® TC 295 at the specified coverage rate of 15–20 wet mils.

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.

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.