Neogard 7780/7781 (Hempel 280J9/98060) primer is a two-component, water-borne epoxy primer. Questions about Neogard 7780/7781? Contact Us.
Version, mixed product 280JB
Mixing ratio: Base 280J9 : Curing Agent 98060 4 : 1 by volume
Mixing instructions:Pre-mix base for 3–5 minutes before adding curing agent. Mix for a minimum of 5 minutes before applying. Jiffy Mixer paddle recommended.
Application method: Roller or spray (contact Neogard for spray equipment information)
Thinner (max.vol.): Do not thin
Pot life: 2 hours at 75°F (23°C)
Cleaning of tools: Water
Safety: Handle with care. Before and during use, observe all safety labels on packaging and paint containers, consult Neogard Safety Data Sheets and follow all local or national safety regulations.
Surface preparation: According to Neogard Guide Specifications.
Application conditions: Recommended air temperature: ≥50°F (10°C). Recommended relative humidity: 45–75%. Temperature of concrete must be at least 5°F (3°C) above the air dew point during coating application and cure time. Avoid application on a damp surface. Do not apply in the late afternoon if moisture condensation can appear during the night.
Subsequent coat: According to Neogard Guide Specifications.
Storage temperature: Store above freezing (32°F, 0°C). Freezing will cause 7779/7781 to become unusable. Do not ship or store unless protection from freezing is available. Do not apply if conditions will not permit complete cure before rain, dew or freezing temperatures occur.
Remarks: Avoid applying a thick film. Thick film increases cure time, especially at low temperature and high relative humidity, and may blister and crack on a hot concrete surface.