Sika® Concrete Primer
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Sika® Concrete Primer is a two-component, rapid curing, high solids, polyurea/polyurethane-hybrid primer for consistent and durable adhesion of Sikalastic® RoofPRO Systems.
- Fast curing - overcoat possible after 30 minutes
- Combines rapid cure time with a long pot life.
- Significantly reduces the likelihood of out-gassing from susceptible substrates
- Consolidates dusty or friable surfaces
- Easy application by brush or roller
- Can be filled with quartz sand and used as a scratch coat
Usage
Versatile primer on cementitious substrates for use with:- Sikalastic® RoofPRO Systems
Advantages
- Fast curing - overcoat possible after 30 minutes
- Combines rapid cure time with a long pot life.
- Significantly reduces the likelihood of out-gassing from susceptible substrates
- Consolidates dusty or friable surfaces
- Easy application by brush or roller
- Can be filled with quartz sand and used as a scratch coat
Packaging
| 4.5 L kit | 3.5 L component A |
| 11.5 L kit | 9.0 L component A |
Product Details
Chemical Base
Two-component solvent-based Polyurea/Polyurethane hybrid
Shelf Life
12 months from date of production
Storage Conditions
The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between 41 °F (5 °C) and 77 °F (25 °C). Higher storage temperatures may reduce shelf life of product. Reference shall also be made to the storage recommendations within the safety data sheet.
Condition material to 50°-77°F (10°-25°C) before using for easier application.
Density
| ~1.02 kg/l (at 73 °F (23 °C) and 50 % R.H) |
Solid Content
| 72 % | (ASTM D-2697) |
Volatile organic compound (VOC) content
| 280 g/l | (ASTM D-2369-81) |
Service Temperature
22–176 °F (-30–80 °C) intermittent
Application
Mixing Ratio
Component A : Component B = 3.55:1 (by volume)
Ambient Air Temperature
41 °F (5 °C) min. / 95 °F (35 °C) max.
Substrate Temperature
41 °F (5 °C) min. / 140 °F (60 °C) max.
Dew Point
Beware of condensation.
The substrate and uncured coating must be ≥ 5 °F (3 °C) above dew point.
Substrate Moisture Content
≤4 % pbw moisture content
Test method: Sika®-Tramex meter. No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
45 minutes
Sika® Concrete Primer is designed for fast curing. High temperatures combined with high air humidity will increase the curing process. Thus, mixed material in opened containers should be applied immediately. In opened containers, the material will form a film after approx 45 min..
Waiting / Recoat Times
| Temperature | Minimum waiting time | Maximum waiting time |
| 50 °F (10 °C) | 60 min. | 24 h |
| 68 °F (20 °C) | 30 min. | 24 h |
Ideally, membrane resin will be applied within 24 hours of primer application. Maximum primer exposure is 48 hours. Primer exposed longer than 48 hours, and primer exposed to water during curing and exhibiting a chalky appearance, must be re-primed. Deteriorated primer must be
mechanically removed before primer reapplication..
SUBSTRATE PREPARATION
All surfaces to be coated should be thoroughly cleaned by conventional means.
Inspect the substrate.
Spalling, flaking or damaged areas should be repaired using compatible materials to match surroundings or replaced as necessary.
If in doubt apply a test area first.
Tiles have to prepared mechanically, glazing has to be removed
Grinding may be necessary to level the surface.
For detailed information regarding substrate quality / preparation and primer chart please refer to Sikalastic® RoofPRO Application Manual.
MIXING
Mix ratio is 3.55:1 (A:B) by volume. Add Part B into Part A and mix with mechanical mixer (Jiffy) at low speed. Avoid adding air into the primer during mixing. When fully mixed, the primer should be free from streaks and be a uniform amber color.
Do not break down kits into smaller quantities.
APPLICATION
Apply Sika® Concrete Primer by brush or phenolic resin core roller at the recommended rate. Correct amount of primer will saturate the substrate and leave a slight film on the substrate top surface. Apply evenly without puddling.
CLEANING OF TOOLS
Remove wet primer with MEK, xylene, or oxygenated solvents. Once cured, primer can only be removed by mechanical means. Strictly follow solvent manufacturer’s warnings and instructions for use.