Genfloor / Primers and Impregnations / 640 Genfloor Primer
PRIMERS AND IMPREGNATIONS · PRIMER / IMPREGNATION
640
Genfloor Primer
2K · Solvent-free epoxy · Primer
Solvent-free, two-component, clear epoxy concrete primer and impregnation.
A 100% solids (solvent-free), two-component, clear concrete primer made of epoxy resin and hardener. Its excellent penetration fills the capillary pores of concrete, increases surface strength and forms a strong adhesion bridge for subsequent epoxy and polyurethane coats.
Technical Data
BINDER
Epoxy resin
COMPONENTS
Two-component (2K)
POSITION IN SYSTEM
Primer / impregnation
DENSITY
1.05 ± 0.05 kg/L
VOLUME SOLIDS
Solvent-free (~100%)
THEORETICAL COVERAGE
250–500 g/m² (depending on substrate)
MIXING RATIO
2 : 1 by weight (A : B)
THINNING
Do not thin
APPLICATION METHOD
Roller, brush; trowel for sand-filled levelling
SURFACE PREPARATION
Milling / shot-blasting, moisture < 4%
COVERAGE
—
COVERAGE
—
DRYING
Dust dry 3–4 h · Touch dry 8–10 h · Full cure 7 days (23 °C)
PACKAGING
15 kg kit (10 kg A + 5 kg B)
COLOUR
Clear
TECHNICAL DOCUMENTS
Use and Application
AREAS OF USE
Used as a primer coat on cured concrete, terrazzo, ceramic tiles and metal to give floor coatings strong adhesion.
SURFACE PREPARATION AND APPLICATION
New concrete must be cured for at least 28 days; surface moisture must not exceed 4%. Remove weak surface layers, laitance, oil, curing compounds and old coating residues by milling, shot-blasting or diamond grinding; remove the dust with an industrial vacuum. Repair cracks and holes with epoxy repair mortar. Mix components A and B with a low-speed mechanical mixer until homogeneous (at least 2–3 minutes) and apply the mix within its pot life. Apply the primer by roller or brush so that it impregnates the surface; on rough surfaces it can be mixed 1:1 with 0.2–0.5 mm silica sand and used as a trowelled levelling coat. Apply the next coat within 24 hours at the latest. Ambient and floor temperature must be between +10 °C and +30 °C and relative humidity below 80%; floor temperature must be kept at least 3 °C above the dew point.
APPLICATION AREAS
→ Factories and Production Plants
→ Warehouses and Logistics Centres
→ Pharmaceutical, Hospital and Laboratory
→ Aircraft Hangars and Defence Industry
Technical data are average values at 20 °C and 65% relative humidity. Coverage varies with surface roughness, application method and film thickness. Consult the Gen Boya technical team for project-specific system design.
KEY FEATURES
— Solvent-free, low-odour formulation
— Deep penetration into concrete capillaries
— Increases surface strength
— Can be used with silica sand as a levelling / scratch coat
— Compatible with all Genfloor epoxy and polyurethane systems
SYSTEM RECOMMENDATION
SUBSEQUENT COATS
Continue with 657 / 660 Self-Levelling, 659 Genfloor Topcoat SF or 655 HB Flex.