Product Data Sheet
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Sikalastic® EPDM/TPO Primer Lo-VOC

Single component low VOC primer for consistent and durable adhesion between Sikalastic® RoofPro and Sikalastic RoofCoat systems to EPDM and TPO Membranes

Sikalastic® EPDM/TPO Primer Lo-VOC is a rubber polymer-based primer used to improve adhesion of Sikalastic RoofPro and RoofCoat liquid applied membranes to flexible EPDM and TPO roofing membranes.Sikalastic® EPDM/TPO Primer Lo-VOC has been formulated with VOC exempt solvents for use in regulated markets where other solvent borne primers can not be used. This primer does not react with atmospheric moisture allowing it to be opened and resealed for use at a later date.
   

  • Provides excellent adhesion of new Sikalastic® liquid applied membrane to most EPDM & TPO membranes
  • Quick cure allows same day Sikalastic® membrane application in most instances
  • Low VOC content (240 g/l) for use in VOC regulated markets
Product Data Sheet
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Usage

Sikalastic® EPDM/TPO Primer Lo-VOC is used to prime EPDM or TPO roofing membrane to improve adhesion of Sikalastic® RoofPro & Sikalastic® RoofCoat Systems. It is used for overcoating existing roofing membranes, flashing and flashing of penetrations and perimeter terminations. It enhances performance of repairs, or modification to the existing roofing system.

Advantages

  • Provides excellent adhesion of new Sikalastic® liquid applied membrane to most EPDM & TPO membranes
  • Quick cure allows same day Sikalastic® membrane application in most instances
  • Low VOC content (240 g/l) for use in VOC regulated markets

Packaging

3 gal. pail; (11.4 L) 

Color

Translucent / Off-white

Product Details

Product Information

Shelf Life

18 months in original, unopened and undamaged sealed containers

Storage Conditions

Store dry between 41 °F and 86 °F (5–30 °C)

Density

1.17 kg/l

Volatile organic compound (VOC) content

240 g/l

(Rule 1168)
Technical Information

Service Temperature

-22–176 °F (-30–80 °C) intermittent

 

Application

Application Information

Ambient Air Temperature

41 °F (5 °C) min. / 95 °F (35 °C) max.

Relative Air Humidity

80 % R.H. max.

Dew Point

Beware of condensation.
The substrate and uncured coating must be ≥ 5 °F (3 °C) above dew point.

Substrate Temperature

41 °F (5 °C) min. / 140 °F (60 °C) max.

Pot Life

Once opened, the product should be used and reasealed promptly. Sikalastic® EPDM/TPO Primer Lo-VOC does not react with atmospheric moisture allowing it to be opened and resealed for use at a later date.

Waiting / Recoat Times

30–45 minutes at 77 °F (25 °C) and 50 % R.H.. Lower temperatures will extend cure time.
Membrane resin has to be be applied within 24 hours of primer application.
Application steps

SUBSTRATE PREPARATION

All work surfaces should be clean, dry, free of dirt, dust, debris, oils, unadhered coatings, deteriorated membrane and other contaminants that may result in a surface that is not sound or is uneven. Aged waterproofing membrane should be pressure washed and dried completely before applying Sikalastic® EPDM/TPO Primer Lo-VOC. If necessary, clean the surface with an approved EPDM membrane cleaner prior to application of Sikalastic® EPDM/TPO Primer Lo-VOC.

MIXING

Shake or stir the 3 gal. pail of Sikalastic® EPDM/TPO Primer Lo-VOC prior to application and restir every 15-20 minutes during use. 

Note: product may exhibit an “apple sauce” type texture even after agitation. This appearance is normal and will not adversely affect the product’s performance.

APPLICATION

Do not dilute or extend Sikalastic® EPDM/TPO Primer Lo-VOC. Surfaces should be dry, clean and free of any loose debris before applying Sikalastic® EPDM/TPO Primer Lo-VOC. EPDM or TPO Surfaces should be cleaned with a suitable solvent such as mineral spirits prior to priming. Observe all manufacturers’ safety precautions and follow recommendations when using solvents. When the surfaces are dry, apply Sikalastic® EPDM/TPO Primer Lo-VOC with a fully saturated roller or scouring pad (recomended). If using a scouring pad, be sure that it is free of excessive dust from EPDM membranes. Replace pads often. Do not overwork primer. The surface should appear wet during application. Allow primer to dry completely before applying resins. Primer will visually appear “dull” or “flat” and will feel dry to the touch. Drying conditions will vary depending on ambient air conditions. When not in use, keep lid on primer to prevent solvent evaporation. When finished, secure the lid and store primer as recommended for reuse.

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