Sikafloor® Duochem-942
Sikafloor® Duochem-942 is a two-component, clear or pigmented, smooth aliphatic urethane coating specifically formulated to provide abrasion and UV-resistance to floors and walls. Sikafloor® Duochem-942 Clear is available in three gloss levels: matte, satin and gloss. Sikafloor® Duochem-942 Pigmented is available in gloss only.
- Excellent hiding properties in pigmented version
- Gloss retention in clear and coloured versions
- Ultra violet light-resistant, non-yellowing
- High resistance to abrasion and wear
- Good chemical-resistance, especially within corrosive environments
- Forms hard yet flexible film
- Provides improved impact-resistance
- Convenient 2 : 1 mixing ratio
- Enhanced stain-resistance
- Easy to clean and maintain
Usage
- Sikafloor® Duochem-942 is suitable for a wide range of applications requiring outstanding protective properties, including resistance to abrasion and corrosive environments.
- For applications where a high-gloss finish, exhibiting excellent clarity or colour retention is needed.
- As an abrasion resistant and high gloss, easy to clean wall coating (consult Sika Canada for guidance).
- As a decorative, thin-film sealer on concrete, steel, hard wood and existing epoxy floor surfaces to improve gloss and colour retention and long-term wear resistance.
Advantages
- Excellent hiding properties in pigmented version
- Gloss retention in clear and coloured versions
- Ultra violet light-resistant, non-yellowing
- High resistance to abrasion and wear
- Good chemical-resistance, especially within corrosive environments
- Forms hard yet flexible film
- Provides improved impact-resistance
- Convenient 2 : 1 mixing ratio
- Enhanced stain-resistance
- Easy to clean and maintain
Packaging
11.34 L (3 US gal.) units
Colour
Clear (gloss, matte or satin), Special colours on request (gloss only).
Product Details
APPROVALS / CERTIFICATES
- Meets the requirements of CFIA and USDA for use in food plants
Shelf Life
Gloss 1 year in original, unopened packaging
Satin & Matte 6 months in original, unopened packaging.
Storage Conditions
Store and transport dry at 5 °C to 32 °C (41 °F to 89 °F). Condition product between 18 °C to 30 °C (65 °F to 86 °F) before using.
Solid content by volume
| Clear | ~60 % |
| Pigmented | ~65 % (dependent upon colour) |
Volatile organic compound (VOC) content
< 240 g/L
Abrasion Resistance
| ~82 mg loss | (ASTM D4060) |
Tensile Strength
| ~37.2 MPa (~5400 psi) | (ASTM D638) Type IV |
Pull-Off Strength
| > 2.7 MPa (> 400 psi) (concrete failure) | (ASTM D7234) (concrete epoxy sealed) |
Coefficient of Friction
| ~0.23 Wet (smooth high gloss) ~0.97 Dry (smooth high gloss) ~0.47 Wet (optional Sikafloor® 4 Texture - ceramic spherical wear aggregate) | ANSI A326.3 BOT 3000e |
Permeability to Water Vapour
| ~0.48 g/h/m2 | (ASTM E96) Water procedure B / Film 0.01 cm (0.004”) |
| Permeance: ~1 perm | (ASTM E96) Water procedure B |
Chemical Resistance
Contact Sika Canada
Application
Mixing Ratio
A : B = 2 : 1 by volume
Product Temperature
Condition product between 18 °C to 30 °C (65 °F to 86 °F) before using.
Ambient Air Temperature
Minimum 16 °C (61 °F) Maximum 30 °C (85 °F)
Relative Air Humidity
Maximum 75 % (during application and curing)
Dew Point
Substrate must be at least 3 °C (5 °F) above the Dew Point to reduce the risk of condensation, which may lead to adhesion failure or “blushing” on the floor finish.
Substrate Temperature
Minimum 16 °C (61 °F) Maximum 30 °C (85 °F)
Mixing and Application attempted at Material, Ambient and/or Substrate Temperature conditions lower than 18 °C (65 °F) will result in a decrease in product workability and slower cure rates.
Substrate Moisture Content
Moisture content of concrete substrate must be ≤ 4 % by mass (pbw – part by weight) as measured with a Tramex® CME/CMExpert type concrete moisture meter.
Pot Life
~2 hours at 21 °C (70 °F)
Curing Time
| Tack-free | ~2 hours |
| Foot traffic | ~24 hours |
| Full cure | ~5 days to ~7 days |
Curing times will vary according to ambient air, substrate temperature and relative air humidity.
Waiting Time / Overcoating
| Recoat time | ~8 hours to ~24 hours |
Consumption
Primer: Sikafloor® Duochem-9205 applied at a rate of 4 m²/L (165 ft²/US gal.) at 10 mil d.f.t. per coat.
Finish Coat: Sikafloor® Duochem-942 applied at a rate of 9.5 m²/L to 10 m²/L (385 ft²/US gal. to 405 ft²/US gal.) at 4 mil w.f.t. / 2.3 mil d.f.t. per coat. Two (2) coats are recommended.
Thinning Solvent: Sika Urethane Thinner and Cleaner: maximum 10 % by volume (if required). 100 mL/L (12.8 oz / US gal.) contact Sika Technical Services for additional information.
Actual coverage rates and material consumption will depend upon porosity and profile of substrates. Allowance must be also made for variation in film thickness or number of coats required to achieve opacity with light (ie white) or bright colours (i.e. reds and yellows) and dark substrates. Test sections are recommended to establish correct coverage.
APPLICATION INSTRUCTIONS
SURFACE PREPARATION
The concrete surface must be dry, clean and sound. Remove any dust, laitance, oil, dirt, curing agent, impregnations, wax, foreign matter, coatings and disintegrated material from the surface by any appropriate mechanical means, in order to achieve a profile equivalent to ICRI / CSP 3 - 4 for floors or ICRI / CSP 2 - 3 for walls. The compressive strength of the substrate should be at least 25 MPa (3625 psi) at 28 days and at least 1.5 MPa (218 psi) in tension at the time of application of the Sikafloor® Duochem-9205 (Primer) or epoxy flooring. Epoxy or polyurethane coatings that have exceeded their overcoating time must be sanded and wiped with a solvent-moistened rag prior to Sikafloor® Duochem-942 application
MIXING
Mixing Ratio (A:B) = 2:1 by volume.
Do not hand mix Sikafloor® materials. Mechanical mixing only. Pre-stir each component to ensure all solids are evenly distributed and even colours and consistencies are achieved within each component.Where supply format permits, empty Component B into A or, in the ratio of 2 : 1 by volume Component A: Component B, empty material into a suitably sized and clean mixing vessel and thoroughly mix for three (3) minutes using a low-speed drill (300 - 450 rpm) fitted with an Exomixer® type mixing-paddle (recommended model). To minimize entrapping air, ensure mixing paddle is kept in the material. During the mixing operation, scrape down the sides and bottom of the pail with a flat orstraight-edge trowel at least once to ensure thorough mixing. Sikafloor® Duochem-942 should be uniform in colour or clarity and consistency before use.
Mix only the quantity you can use within its pot life.
Optional Sikafloor®-4 Texture - Ceramic Spherical Wear Aggregate See Sikafloor®-4 Texture individual product data sheet for addition rate and Mixing Instructions.
APPLICATION
Primer: Apply Sikafloor® Duochem-9205 over the slab as a primer using a notched squeegee and/or roller at a uniform coverage rate of approximately 4 m2/L (165 ft2/US gal.) without ponding. Allow the primer to cure for 12 hours at 23 °C (73 °F) before applying Sikafloor® Duochem-942.
Finish Coat: Sikafloor® Duochem-942 may be applied using conventional or airless spray, high quality, short nap rollers (lint-free), natural bristled brush or squeegee and backrolled. Waiting time between coats will be approximately 8 hours to 24 hours dependent upon temperatures.
CLEAN UP
Clean tools and brushes with Sika® Urethane Thinner & Cleaner. Once hardened, product can only be removed mechanically.
