PRODUCT FEATURES
- Aliphatic, single component, moisture cure polyurethane topcoat
- Outstanding gloss retention when exposed to damaging U.V. rays
- Super tough, hard and impact resistant topcoat
- Excellent adhesion
- Anti-graffiti properties
- Tile like glaze coating
- Outstanding gloss retention when exposed to damaging U.V. raysUltimate protection when used as a finishing coat over Glass Shield epoxies, moisture
cure urethane primers or polyurethane topcoats
- Can be applied and cured at temperatures below freezing (-4C)
- Single component product avoids mixing errors
- Can be applied in damp and humid conditions
- Easy to apply with any traditional painting equipment
Suggested Uses
- Steel
- Fiberglass
- Wood
- Interior or exterior concrete
Technical Data
| Coating type |
Single component
moisture cure urethane |
| Colour |
Clear |
| Packaging |
3.78 L (1 US gallon) 18.9 L (5 US gallon) |
| Mixing Ratio |
Single component |
| Gloss |
90% + |
| Flashpoint (ASTM D93) |
26º C (80º F) |
| Thinner |
GS UC 500S |
| Pot life |
4 to 6 hours |
| Shelf life |
1 years |
| Density (ASTM D 1475) |
1.40 kg / L +/- 0.05 |
| Weight |
8.32 +/- 0.11 lb / US gal. |
| Volatile organic compound
(VOC) |
4.0 lb / US gal. (485 g/L) |
| Temperature resistance |
100º C (212º F) in continuous service |
| Solids (ASTM D1644) |
| By weight |
50 +/- 2% |
| By volume |
45 +/- 2% |
| Theoretical
spreading rate |
17 sq.m / l at 25 microns dry
705 sq.ft. / US gal at 1 mil |
| Recommended film thickness |
50 - 100 microns dry
(2.0 - 4.0 dry mils) |
| Application methods |
Conventional air spray, airless and HVLP |
Surface Preparation
Surface must be clean, dry and free from any sources of contaminants.
Remove dust, grease, wax, oil, rust, silicone residue, etc. Remove all
old paints in order to obtain adequate adhesion.
Mixing and Thinning
MONOGLASS™ MC-4250 is a one component product supplied in
1 US gallon container or 5 US gallon containers.
Thinning is not recommended.
The pot life or the "working pot" is up to 6 hours. After the paint
is stirred and poured, immediately seal the original can. Higher
temperatures or humidity will shorten the pot life. Do not apply
over water or frozen surfaces.
Application Conditions
Industry standards are for the substrate temperatures to be above
10º C of the dew point. Condensation due to substrate temperatures below the dew point can cause flash rusting on prepared steel and
interfere with proper adhesion to the substrate.
Special application techniques may be required above or below
normal application conditions.
| Condition |
Material |
Surface |
Ambient |
Humidity |
| Normal |
60 - 85º F
(16 - 29º C) |
65 - 85º F
(18 - 29º C) |
60 - 90º F
(16 - 32º C) |
0 - 65% |
| Minimum |
50º F (10º C) |
23º F (5º C) |
23º F (5º C) |
0% |
| Maximum |
90º F (32º C) |
100º F (35.5º C) |
100º F (35.5º C) |
85% |
DISCLAIMER: All information is given in good faith. Since conditions of use are beyond the manufacturer's
controls, all information contained herein is without warranty, implied or otherwise. All technical data and
specifications are subject to change. Please consult with your Glass Shield representative for more detailed
coating recommendations. Revised 08-01-2007
Typical Sequence (First class finish)
Application
MONOGLASS™ MC-4250 can be applied by brush, roller or spray.
De Vilbiss or equilavent equipment should be used. Airless spray:
heavy duty 30:1 airless pump with tip size 0.017-0.021 in. at
3000 psi pressure with 3/8 fluid hose maximum 50ft lenght. Spray
gun : similar to the De Vilbiss 510, fluid tip 0.55-0.73 in. at 30-60
psi pressure. For HVLP applications, please consult and follow
equipment supplier's instructions. For applications, please refer and
comply with equipment supplier's recommendations.
Curing times given at 23ºC (73ºF) and 40% relative humidity. Higher
or lower temperatures will affect drying times.
Airless & Air Spray
| Manufacturer |
Graco |
| Pump |
30 : 1 |
| Fluid hose |
3/8" x 100' max |
| Tip size |
* |
| PSI |
2400 PSI min. |
| Manufacturer |
Devilbiss |
SATA |
| Spray gun |
HET |
K3 RP |
| Fluid tip |
1.4-1.6 ff |
1.4-1.6 |
| Air cap |
#410 / 414 |
|
| Fluid line |
3/8" |
3/8" |
| Pressure pot |
15 - 25 psi |
40 psi |
| Atomizing air |
50 - 60 psi |
36 psi |
* Refer to Kremlin chart for specific uses or consult
Glass Shield technical services
Curing Schedule
Ventilate the substrate for 2 hours after application. Curing times
are based on a 2.0-3.0 mil (50-75 micron) dry film thickness. Higher
film thickness, insufficient ventilation or cooler temperatures will
require longer cure times and could result in solvent entrapment and
premature failure of the film. Maximum recoat time is 5 days without
special surface preparation. If you desire a longer recoat window,
an additive can be added. Consult a Glass Shield representative for
further information. If the maximum recoat time has been exceeded,
the surface must be sanded or prepared with a brush off blast SSPCSP-
7 prior to the application of additional coats. MONOGLASS™
MC 4250 applied below 40ºF (4º C) may temporarily soften for
several hours, after temperatures rise to 60ºF (16º C). This is a normal
condition and will not influence performance.
| Dry to touch |
4-6 hours |
| To recoat |
8-10 hours (sanding required after 10 hours) |
| Hard |
10 hours |
| Full cure |
7 days |
