Sikafloor® Duochem-942

• Meets the requirements of CFIA for use in food plants
• CAN/ULC S102.2: Standard test method for determining the surface burning characteristics of flooring materials.
  ▪ Flame Spread Index (FSI): 0
  ▪ Smoke Developed Index (SDI): 30

Gloss: 9 months in original, unopened packaging

Satin & matte: 6 months in original, unopened packaging.

Store in a dry place, protected from freezing at a temperature between 5 °C and 32 °C (41 °F and 90 °F).  Protect from freezing. If Sikafloor® Duochem-942 has frozen, contact Sika Canada.  

< 240 g/L

A+B (Clear): ~240 cPs

Contact Sika Canada®

A:B = 2:1 by volume

Condition product between 18 °C to 30 °C (65 °F to 86 °F) before using.

Minimum 16 °C (61 °F)  Maximum 30 °C (85 °F)

Note: Mixing carried out under conditions where the Sikafloor® Duochem-942 temperature and ambient temperature are below 18°C (65°F) will result in reduced product workability and slower curing rates.

Maximum 75 % (during application and curing)

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. Be aware that the substrate temperature may be lower than the ambient temperature.

Minimum: 16 °C (61 °F) / Maximum: 30 °C (86 °F)

Note: Any attempt to apply Sikafloor® Duochem-942 at substrate temperature conditions less than 18 °C (65 °F) will result in an increase in viscosity and slower cure rates.
 

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.

~2 hours at 21 °C (70 °F)

IMPORTANT: If the maximum waiting time has been exceeded. The previous coat must be lightly sanded, to remove all gloss; vacuum cleaning using a brush attachment followed promptly with a solvent wipe off the surface as per the following generally accepted practices:

• Avoid using solvent that can leave a oily residue: (such as, but not limited to most mineral spirit).
• Avoid Paper Towels: Pre-treated shop towels or standard paper towels may contain silicone or manufacturing additives that will ruin your paint job. Stick to lint-free cotton cloths or dedicated microfiber towels.   
• Change Rags Frequently: As soon as a rag becomes visibly dirty, discard it or fold it to a clean side. Continuing to wipe with a saturated, dirty rag just re-deposits contaminants onto the surface.    
• Wet Wipe: Pour a solvent (onto the first rag. Do not dip the rag into the solvent container; pour it directly to keep your supply clean).   
• Lift: Wipe down a small, manageable section (e.g., ~0.5 m2 [~ 4-6 ft2]) of the surface. Use enough pressure to break up and lift the oils or sanding dust. Rotate the cloth frequently so you are always using a clean spot.  
• Dry Wipe: Before the solvent can flash off (evaporate) and dry on the surface, wipe the same section with a second, clean, lint-free rag. When used correctly, this second cloth absorbs residual solvent and removes materials that could reduce or prevent adhesion or the proper performance of the next coat.

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 to 10 m²/L (385 to 405 ft²/US gal.) at 4 mil w.f.t. / 2.3 mil d.f.t. per coat.

Note: Two (2) coats are recommended.

Important: Actual coverage rates and material consumption will depend upon porosity and profile of substrates. Allowance must also be 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.

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

Concrete surfaces must be clean and sound. The compressive strength of the concrete substrate should be at least 25 MPa (3625 psi) at 28 days and a minimum of 1.5 MPa (217 psi) in tensile strength, at the time of the application.

Substrates must be free of contaminants such as dust, dirt, existing paint films, efflorescence, exudates, laitance, form, hydraulic or fuel oils, brake fluid, grease, fungi, mildew, biological residues or any other contaminants which may prohibit good bond or conditions of the substrate that may reduce the overall performances of Sikafloor® Duochem-942.

Mixing Ratio A:B = 2:1 (by volume)

IMPORTANT: 

• Do not hand mix Sikafloor® Duochem-942; mechanically mix only.
• Sikafloor® Duochem-942 must be applied as supplied. 
• Because the product is sensitive to moisture during application and storage, once the container of component B is opened, it must be used immediately.

Pre-stir Components A and B separately, making sure all solids, are evenly distributed. Empty Component B (Hardener) in the correct mix ratio into Component A (Resin) or empty Component A into a suitably sized and clean pail and add Component B in the correct ratio. Blend the combined components thoroughly at low speed (300 - 450 rpm) for at least three (3) minutes using a drill fitted with an Exomixer® or Jiffy type paddle suited to the dimensions of the mixing container and keep the mixing paddle in the mix to avoid entrapping air. Take care not to introduce any air bubbles while mixing. Make sure the contents are completely mixed to avoid any weak or partially cured spots in the coating. During the mixing operation, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once to ensure complete mixing. Do not attempt to attend to unmixed material that may gather on the sides of the mixing container while mechanical or electrical parts are in motion. When completely mixed, Sikafloor® Duochem-942 should be uniform in appearance and consistency.

Note: Do not mix more material than can be applied within the working time limits (i.e. Pot Life) at the actual field temperature.

Optional Sikafloor®-4 Texture - Ceramic Spherical Wear Aggregate

See Sikafloor®-4 Texture individual product data sheet for addition rate and Mixing Instructions.

Primer coat: Apply Sikafloor® 1620 (clear coating) or Sikafloor® 26 CA (pigmented coating) over the slab as a primer coat 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 all tools and equipment with a non-flammable solvent. Once hardened, product can only be removed mechanically.