Product Data Sheet
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Sikalastic®-720 Base

Sikalastic®-720 Base

TWO-COMPONENT, FAST-CURING, SOLVENT-FREE, CRACK-BRIDGING, ELASTOMERIC POLYURETHANE BASE COAT

Sikalastic®-720 Base is a two-component, aromatic, 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 base coat under a separate wearing course such as concrete or asphalt pavement, and tile in a setting bed.

  • Low odor and fast turnaround
  • Excellent crack-bridging properties and flexibility, even at low temperatures
  • Resistant to water and de-icing salts
  • Alkaline resistant
Product Data Sheet
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Usage

  • Multi-story parking garages
  • Parking decks and ramps
  • Foot bridges and walkways
  • Mechanical rooms
  • Stadiums and arena
  • Plaza and rooftop decks
  • Balconies
  • Roofing Flood Coat when mixed with approved aggregate
 

Advantages

  • Low odor and fast turnaround
  • Excellent crack-bridging properties and flexibility, even at low temperatures
  • Resistant to water and de-icing salts
  • Alkaline resistant

Packaging

20 gal. kit - four 5 gal. pails (net 4 gal. each)  Part A and four 1 gal. cans Part B

Color

Gray/White

Product Details

Product Information

Shelf Life

12 months 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.

Solid content by volume

100 %

(ASTM D-2697)

Volatile organic compound (VOC) content

See Product Safety Data Sheet
Technical Information

Shore A Hardness

80 +/- 5 (75 °F (24 °C) and 50 % R.H.)

(ASTM D-2240)

Tensile Strength

2500 +/- 100 psi (75 °F (24 °C) and 50 % R.H.)

(ASTM D-412)

Tear Strength

300 +/- 25 pli (75 °F (24 °C) and 50 % R.H.)

(Die C, ASTM D-624)

Chemical Resistance

Resistant to de-icing salts, and alkaline concrete and cementitious mortars/tile adhesives.

Application

Application Information

Pot Life

10–15 minutes
Consumption

Coverage

70 ft²/gal. at 23 wet mils (23 dry mils)
Application steps

MIXING

Premix Part A and Part B components using a mechanical mixer (Jiffy) 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 (see appropriate System Guide) 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 3–4 hours at 70 °F and 50 % R.H. or until tack fee before top coating.

When used under an overburden system an additonal coat of Sikalastic®-720 Base, fully broadcast, is required, allow coating to cure for a minimum of 36 hours before installing separate overburden.

  

Removal

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

 

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