Description
Size: 15.12 L (4 gal)
Sikafloor-1620 is a state of the art, multi-component, high solids, low viscosity, moisture tolerant, epoxy primer that forms a dense, low permeability film on concrete substrates to significantly reduce moisture vapour transmission in compliance with ASTM F3010. Sikafloor-1620 contains a blue trace dye that acts as a visual aid to ensure complete coverage.
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Material Use:
Sikafloor®-1620 is a high-solids, low-viscosity, moisture-tolerant epoxy primer used as a moisture vapor control layer on concrete substrates. It is designed to significantly reduce moisture vapor transmission and is suitable for use beneath Sikafloor®, Sikagard®, and Sikalastic® resin flooring systems.
System Components:
- Primer: Sikafloor®-1620 (applied as a neat coat with no aggregate broadcast)
- Moisture Barrier (if needed): Sikafloor®-81 EpoCem®CA (used when substrate moisture exceeds 6%)
- Topcoat Options: Any Sikafloor®, Sikagard®, or Sikalastic® resin systems as specified
Applications:
- Suitable for use in interior environments on high-moisture concrete substrates
- Used under resin flooring systems to meet ASTM F3010 moisture mitigation standards
- Approved for use in food processing facilities (CFIA and USDA compliant)
Application Details:
- Mix Ratio: A:B = 3:1 by volume
- Coverage: ~106 ft²/US gal at 15 mils wet film thickness
- Installation Temperature: 10–30 °C (50–86 °F)
- Humidity Limit: Max 85% RH during application and cure
- Substrate Moisture Limit: ≤ 6% by weight (Tramex® CM/E meter)
- If >6% Moisture: Use Sikafloor®-81 EpoCem®CA then coat with Sikafloor®-1620
- Pot Life: ~38 minutes at 20 °C (68 °F)
- Cure Time:
- Foot traffic: 8–36 hours depending on temperature
- Full cure: 4–10 days
- Overcoating Window:
- At 20 °C (68 °F): 8 to 48 hours
- Surface must be sanded if max recoat time exceeded
Special Notes:
- Sikafloor®-1620 is not UV stable and will discolor over time if exposed; it must be overcoated.
- Not suitable for exterior slabs exposed to freeze-thaw cycles or extreme thermal shock.
- Not a finish coat—only a primer for moisture control.
- Do not apply to polymer-modified cement mortars or ASR-affected substrates.
- Avoid air flow disturbances and contamination during cure.
- Must be mechanically mixed—do not hand mix or thin.
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