Product Data Sheet Show all documents

Sikalastic®-390 NP

Two-component, elastomeric, crack-bridging, primerless, waterproofing base coat

Sikalastic®-390 NP is a two component, primerless, aliphatic, chemically cured, elastomeric polyurethane coating intended for use as the waterproofing base coat under polyurethane or epoxy wearing surfaces for pedestrian and vehicular traffic bearing applications, and as the waterproofing membrane under a separate wearing course such as concrete, and tile in a setting bed. Sikalastic®-390 NP can be a direct replacement for Sikalastic® 390 in all applications over suitable substrate.

  • Excellent crack-bridging properties and flexibility, even at low temperatures
  • Primer not required for typical applications
  • Alkaline resistant
  • Low odor and fast turnaround
  • Impervious to water and deicing salts
Product Data Sheet Show all documents

Usage

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

Advantages

  • Excellent crack-bridging properties and flexibility, even at low temperatures
  • Primer not required for typical applications
  • Alkaline resistant
  • Low odor and fast turnaround
  • Impervious to water and deicing salts

Packaging

10 gal. two component kit, 2x  4.5 gal. comp. A, 2x 0.5 gal. comp. B 

Color

gray

Product Details

Product Information

Shelf Life

12 months in original, unopened containers

Storage Conditions

Store dry at 41–95 °F (5–35 °C).

Condition material to 65–85 °F (18–30 °C) before using.

Solid content by volume

92.70 %

Volatile organic compound (VOC) content

 27.68 g/l
Technical Information

Shore A Hardness

85 +/- 5

(ASTM D-2240)

75 °F (24 °C)
50 % R.H.

Tensile Strength

1230 psi

(ASTM D-412)

75 °F (24 °C)
50 % R.H.

Tear Strength

300 pli

(Die C, ASTM D-624)

75 °F (24 °C)
50 % R.H.

Application

Application Information

Mixing Ratio

comp. A (9) : comp. B (1)  by volume 
Consumption

Coverage

  75 ft2/gal at 21 wet mils (20 dry mils)
  65 ft2/gal at 24 wet mils (23 dry mils)
  60 ft2/gal at 26 wet mils (25 dry mils)

Coverage rates provided 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.  
Application steps

MIXING

Premix Part A and Part B components using a low speed (400–600 rpm) mechanical mixer and Jiffy Paddle at slow speed to obtain uniform color, making sure to scrape the solids from the bottom and sides of the pail. Pour part B into Part A slowly and while mixing scrape the side of the container, Mix the combined material thoroughly until a homogenous mixture and uniform color is obtained (typically 3 minutes). Use care not to allow the entrapment of air into the mixture.

APPLICATION

Apply at the recommended coverage rate  using a notched squeegee or trowel, and backroll using a phenolic resin core roller. Extend base coat over entire area including previously detailed cracks and joints. Allow coating to cure a minimum of 6 hours at 70 °F and 50 % RH or until tack fee before top coating. Allow coating to cure for a minimum of 36 hours before installing separate concrete pavement or tile wear course.

  

Removal

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

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