Sika Primer-3 N is a single-component, solvent-based epoxy primer that helps compatible Sika sealants and adhesives bond to porous construction substrates and selected metals. Use it where the specified Sikaflex, SikaHyflex, SikaBond, Sikasil or SikaSeal system requires this primer.
Sika Primer-3 N prepares clean, dry, sound concrete, masonry, cementitious materials and compatible metals before joint sealing. Surface preparation remains essential: remove dust, laitance, loose material, oil and grease before applying a thin, even coat.
Allow a minimum 30-minute flash-off and apply the compatible sealant or adhesive within 8 hours. At typical rates, allow approximately 5 m² per litre on porous surfaces and 8 m² per litre on non-porous surfaces. Actual use depends on the substrate and application method.
Apply between +5°C and +40°C, with the substrate at least 3°C above dew point. Do not use primer to compensate for a weak or contaminated substrate. Refer to the selected sealant's preparation requirements to confirm that Sika Primer-3 N is the correct pretreatment.
What is Sika Primer-3 N used for?
It promotes adhesion of compatible Sika sealants and adhesives to porous substrates and metals.
How long should it flash off?
At least 30 minutes and no longer than 8 hours before the compatible product is applied.
What coverage should I allow?
About 5m² per litre on porous substrates and 8m² per litre on non-porous substrates.
Does primer replace surface preparation?
No. The substrate must still be clean, dry, sound and correctly prepared.
| Property | Value |
|---|---|
| Composition | 1-component, solvent-based epoxy resin compound |
| Density | 1.00 kg/l (approx.) |
| Viscosity | 10 mPas (approx.) |
| Flash Point | -4 °C |
| Upper Explosion Limit | 7 % (V) |
| Lower Explosion Limit | 1 % (V) |
| Vapour Pressure | 99.9915 hPa |
| Auto-ignition Temperature | 425 °C |
| Dynamic Viscosity | 10 mPa.s (at 20 °C) |
| Kinematic Viscosity | < 20.5 mm2/s (at 40 °C) |
| Ambient Temperature | +5 °C to +40 °C |
| Substrate Temperature | +5 °C to +40 °C |
| Flash-off Time Minimum | 30 minutes |
| Flash-off Time Maximum | 8 hours |
| Yield per Litre on Porous Substrates | 5 m² |
| Linear Meters per Litre on Porous Substrates | 250 m |
| Yield per Litre on Non-Porous Substrates | 8 m² |
| Linear Meters per Litre on Non-Porous Substrates | 400 m |
| Shelf Life | 9 months |
| Storage Temperature | +5 °C to +25 °C |
| VOC Content | 66.6% w/w |
| Storage Conditions | Sika® Primer-3 N shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C. |
| Recoat Time | Minimum 30 minutes; Maximum 8 hours |
Here are some common examples on where Sika Primer-3 N Epoxy Primer used by our customers.
