Sikafloor® Duochem-5235 HHT
Heat and Humidity Resistant, Smooth-Finish, Epoxy Coating
Sikafloor® Duochem-5235 HHT is a two component, solvent free, low odour, solid colour, glossy, high build epoxy coating. It is specifically formulated to provide improved amine blush resistance to allow application beyond the typical heat and humidity micro-environment limitations of traditional epoxy coatings.
- Aesthetic, smooth non-textured, glossy appearance that demonstrates excellent scruff resistance.
- Superior mechanical resistance allows application in areas exposed to light to medium duty traffic.
- General Service, broad spectrum chemical resistance.
- Blush resistant formulation allows application to proceed under extreme conditions.
- Low odour formulation suitable for application in occupied facilities.
- Environmentally friendly; low VOC content that meets LEED® requirements.
Usage
- Suitable for interior applications over new or existing horizontal concrete substrates.
- Allows application during extreme job site micro-environment conditions; high heat up to 38 °C (100 °F) and high relative humidity up to 90%.
- Used as a protective coating to dust proof and protect concrete against deterioration.
Advantages
- Aesthetic, smooth non-textured, glossy appearance that demonstrates excellent scruff resistance.
- Superior mechanical resistance allows application in areas exposed to light to medium duty traffic.
- General Service, broad spectrum chemical resistance.
- Blush resistant formulation allows application to proceed under extreme conditions.
- Low odour formulation suitable for application in occupied facilities.
- Environmentally friendly; low VOC content that meets LEED® requirements.
Packaging
Component A: 12 L (3.17 US gal)
Component B: 6 L (1.58 US gal)
Components A+B: 18 L (4.75 US gal) unit
Colour
W1600 Tile Red, DW1787 Light Grey, U1503 Beige
Custom colours available upon request.
Product Details
Shelf Life
2 years in original unopened packaging.
Storage Conditions
Store dry between 5 °C to 32 °C (41 °F to 89 °F).
Viscosity
~1000 cps (A+B mixed)
Volatile organic compound (VOC) content
~2 g/L
Shore D Hardness
| ~70 | (ASTM D2240) |
Abrasion Resistance
| ~61 mg loss | (ASTM D4060) (CS 17/1000 cycles/1000 g (2.2 lbs.) |
Resistance to Impact
| ~2.7 joules (~23.84 lbs•in) | (ASTM D3029) |
Tensile Strength
| ~39 MPa (~5,656 psi) | (ASTM D2370) |
Pull-Off Strength
| > 2 MPa (> 290 psi) (substrate failure) | (ASTM D7234) |
Service Temperature
Minimum ~0 °C (~32 °F) Maximum ~50 °C (~122 °F)
Water Absorption
| Immersion (24 hrs.) | ~1.60 % |
| Immersion (7 days) | ~1.790 % |
Application
Mixing Ratio
A: B = 2:1 by volume
Product Temperature
Condition at 18 °C to 30 °C (65 °F to 86 °F) before using.
Ambient Air Temperature
Minimum 10 °C (50 °F) Maximum 38 °C (100 °F)
Mixing and application attempted at material, ambient and/or substrate temperature conditions less than 18 °C (65 °F) will result in a decrease in product workability and slower cure rates.
Relative Air Humidity
Maximum 90% (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. Be aware that the substrate temperature may be lower than the ambient temperature.
Substrate Temperature
Minimum: 10 °C (50 °F) Maximum: 38 °C (100 °F)
Do not apply while ambient and substrate temperatures are rising, as pinholes may occur. Ensure there is no vapour drive at the time of application. Refer to ASTM D4263, may be used for a visual indication of vapour drive.
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 on mechanically prepared surface according to this product data sheet (preparation to ICRI / CSP 3 - 4). If moisture content of concrete substrate exceeds 4 % by mass (pbw – part by weight) as measured with Tramex® CME / CMExpert type concrete moisture meter, use Sikafloor®-1610 or Sikafloor®-81 EpoCem®CA.
ASTM F2170 internal probe testing is not a substitute for measuring substrate moisture content with a Tramex® CME / CMExpert type concrete moisture meter as described above. When relative humidity tests for concrete substrate are conducted per ASTM F2170 for project specific requirements, values must be ≤ 85 %. If values exceed 85 %, according to ASTM F2170, use Sikafloor®-1610 or Sikafloor®-81 EpoCem®CA.
Pot Life
| ~25 min | 250 g (8.8 oz) |
Curing Time
| Tack Free | ~6 hours to ~8 hours at 23 °C (73 °F) |
| Full Cure | ~15 days at 23 °C (73 °F) |
| Ready for Service | ~24 hours at 23 °C (73 °F) |
Curing times will vary according to ambient air and substrate temperatures and relative humidity.
Freshly applied material should be protected from dampness, condensation and water for at least 24 hours.
Mechanical, chemical and physical properties will be fully achieved at full cure.
Waiting Time / Overcoating
Minimum ~8 hours Maximum ~48 hours at 23 °C (73 °F)
Consumption
Prime Coat
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.
MIXING
Mixing Ratio - A:B = 2:1 by volume
Do not hand mix Sikafloor® materials. Mechanically mix only.
Pre-mix each component separately. Empty component B in the correct mix ratio to component A. Mix the combined components for at least 3 minutes, using a low-speed drill (300 - 450 rpm) to minimize entrapping air. Use an Exomixer® type mixing paddle (recommended model) suited to the volume of the mixing container. 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. When completely mixed, Sikafloor® Duochem-5235 HHT should be uniform in colour and consistency. Mix only that quantity which can be used within its pot life at actual field temperature.
APPLICATION
Prime Coat: 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 UP
Clean all tools and equipment with Sika® Epoxy Cleaner. Once hardened, product can only be removed mechanically.