Sikafloor® Duochem-5235 HHT

2 years in original unopened packaging. 

Store dry at temperatures between 5 °C and 32 °C (41 °F and 90 °F). Protect from freezing. If frozen, contact Sika Canada.

~2 g/L

A+B: ~1000 cPs

Minimum ~0 °C (~32 °F)   Maximum  ~50 °C (~122 °F)

A:B = 2:1 (by volume)

Condition product at temperatures between 18 °C and 30 °C (65 °F and 86 °F) before using and during the application.

Minimum: 10 °C (50 °F)  Maximum: 30 °C (85 °F)

Note: Mixing carried out under conditions where the Sikafloor® Duochem-5235 HHT temperature and ambient temperature are below 18°C (65°F) will result in reduced product workability and slower curing rates.

Maximum 90% (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.  

Minimum: 10 °C (50 °F)  Maximum: 30 °C (85 °F) 

Note: Mixing and application attempted at material, ambient and /or substrate temperature conditions less than 18 °C (65 °F) will result in an increase of the viscosity of the Sikafloor® Duochem-5235 HHT 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 on mechanically prepared surface according to this product data sheet (preparation to ICRI / CSP 3 - 4). 

~25 min (250 g [8.8 oz])

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).  à

• 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.

As a primer
5 m²/L to 8 m²/L (200 ft²/US gal to 325 ft²/US gal) (5 mil to 8 mil w.f.t.)

Wear Coat
1.6 m²/L to 3.3 m²/L (65 ft²/US gal to 135 ft²/US gal) (12 mil to 25 mil w.f.t.)

NOTE: 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 (i.e. white) or bright colours (i.e. reds and yellows) on dark substrates. Test sections are recommended to establish correct coverage.

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-5235 HHT.

Mixing ratio A:B = 2:1 (by volume) 

IMPORTANT: 

• Do not hand mix Sikafloor® Duochem-5235 HHT; mechanically mix only.
• Sikafloor® Duochem-5235 HHT must be applied as supplied. 

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-5235 HHT should be uniform in appearance and consistency.

Note: Mix only that quantity which can be used within its pot life at actual field temperature.

As a primer: Apply the Sikafloor® Duochem-5235 HHT as a prime coat onto the substrate using a brush, roller or squeegee, at a uniform coverage without puddling.

  
Wear Coat: Once the prime coat is tack free, apply the wear coat using a squeegee or roller and backroll to achieve even coverage.

IMPORTANT: If time between coats exceeds 48 hours at 23 °C (73 °F), the previous coat must be lightly sanded, to remove all gloss; vacuum cleaning and solvent wiping will be necessary to remove all traces of dust. The surface should be a uniform dullness, with no gloss present after clean-up and before applying the next coat.

Clean all tools and equipment with a non-flammable solvent. Once hardened, product can only be removed mechanically.