Sikafloor®-304 W NA
FLEXIBLE CLEAR POLYURETHANE MATTE TOPCOAT
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Sikafloor®-304 W NA is a low VOC, clear, two-part, water based polyurethane, matte finish coat for use with flexible membrane systems.
- Water based
- Very low odor, low VOC
- Excellent UV resistance, non-yellowing
- Easy to clean
- Clear matte finish
Usage
Matte finish top coat for use with decorative Sikafloor® systems and flexible Sika ComfortFloor® Systems.Advantages
- Water based
- Very low odor, low VOC
- Excellent UV resistance, non-yellowing
- Easy to clean
- Clear matte finish
Packaging
Component A | 1.51 US gal. (5.71 L) |
Component B | 0.35 US gal. (1.32 L) |
Component A+B | 1.86 US gal. (7.03 L) |
Mix complete units only
Color
Clear. Not intended for field pigmenting.
Product Details
Shelf Life
12 months in unopened container
Storage Conditions
Store in dry and cool conditions at temperatures ranging between 40 °F - 90 °F (4 °C - 32 °C)
Shore D Hardness
80 | ASTM D2240 at 73 °F (23 °C) and 50% R.H |
Abrasion Resistance
29 mg loss CS-17/1,000 rotations/1,000 g | ASTM D4060 at 73 °F (23 °C) and 50% R.H |
Impact Strength
16 ft.lb | ASTM D2794 at 73 °F (23 °C) and 50% R.H |
Tensile Strength
2,422 psi (16.7 MPa) | ASTM D638 at 73 °F (23 °C) and 50% R.H |
Tensile Adhesion Strength
>500 psi (3.5 MPa) concrete failure | ASTM D7234 at 73 °F (23 °C) and 50% R.H |
Chemical Resistance
Please consult Sikafloor® Technical Services.
Coefficient of Friction
0.51 | ANSI 137.1 at 73 °F (23 °C) and 50% R.H |
Indentation
6.4% | ASTM MIL-PRF-24613 at 73 °F (23 °C) and 50% R.H |
Water Absorption
5.13% (24 hr) 5.5% (7 days) | ASTM D570 at 73 °F (23 °C) and 50% R.H |
Elongation at break
27.6% | ASTM D638 at 73 °F (23 °C) and 50% R.H |
Application
Mixing Ratio
4.3 : 1 by volume
Pot Life
Material Temperature | Time |
50 °F (10 °C) | ~ 40 minutes |
68 °F (20 °C) | ~ 30 minutes |
86 °F (30 °C) | ~ 20 minutes |
Pot life is not visible, product remains liquid after exceding pot life. Application after pot life may result in adhesion failure. Do not apply after pot life limit.
Cure Time
Ambient & Substrate Temperature | Foot Traffic | Light Traffic | Full Cure |
50 °F (10 °C) | ~ 48 hours | ~ 4 days | ~ 7 days |
68 °F (20 °C) | ~ 24 hours | ~ 2 days | ~ 4 days |
86 °F (30 °C) | ~ 8 hours | ~ 24 hours | ~ 2 days |
Waiting / Recoat Times
Ambient & Substrate Temperature | Minimum | Maximum |
50 °F (10 °C) | ~ 16 hours | 48 hours |
68 °F (20 °C) | ~ 5 hours | 48 hours |
86 °F (30 °C) | ~ 2 hours | 48 hours |
Coverage
Coverage rates are calculated based on material needed for finishing of smooth surfaces. Approximately 313 sq. ft. per gallon at 5 wet mils. Kit coverage is approximately 595 sq. ft. at 5 wet mils.
MIXING
Mixing Ratio - 4.3 : 1 by volume
Mix Full units only.
Premix Part A resin using a drill and jiffy blade (300 - 450 rpm). Add Part B hardener to Part A and mix with a jiffy mixer continuously for 3 minutes until a uniform mix has been achieved. To achieve a smoother surface texture and longer working time, 5 (12 oz.) to 10 % (24 oz.) water by volume should be added to each resin/ hardener mix.
Following addition of the water, mix with Jiffy mixer continuously for 1 minute. Wait one minute and then mix again for one additional minute. The quantity of water added must be the same in every mix. If the quantity is not the same, it can influence the gloss and texture of the cured film.
To ensure thorough mixing, pour materials into a second container following the initial mix and blend again to achieve a consistent mix. Over mixing may cause air entrainment.
APPLICATION
This material can be applied using either a spray or roller application. Most consistent finish results are obtained through spray application. Contact Sikafloor® Technical Service for more information regarding spraying this product.
Prior to application confirm relative air humidity and dew point. Minimize air movement during the topcoat application to ensure that surface dry does not happen prior to release of any bubbles or entrapped air. Ensure that sufficient air movement is restored following the application in order to ensure the required curing conditions are met.
Divide the area to be coated into equal sections for the number of units to be applied, to ensure the correct yield. Wet out rollers when starting application taking into consideration the amount of material the roller will absorb.
The roller will absorb approx. 10.5 oz. - 17.6 oz. of coating. Start coating the floor by cutting in the edges with a brush and/or small roller. Only cut in edges of an area that can be top coated in 10 minutes, to attain minimal visibility of roller marking. Work quickly within the pot life to pour out the material and spread at the recommended coverage rate. Overworking or under-application may also result in coating pick up or glossy holidays in the cured film.
IMPORTANT NOTE - This product does not have a visible end of pot life.
It is imperative that you watch the time and temperature to ensure you are working well within the pot life. To minimize roller marking when finish is applied via roller application, the material must be poured onto the floor then spread with a 3/8” nap roller in the pouring direction with the bead. The material should then be cross rolled covering a width of approximately 4 feet and a depth of approximately 5 feet.
Do not overlap more than 2” onto the prior pass. Porous areas where the surface of the self leveling layer is “opened” by sanding (such as after repairs), must be pre-coated a few minutes ahead of the final roll-out to ensure wet out and minimize visibility. A seamless finish can be achieved if a “wet” edge is maintained throughout the application.