Sikafloor®-1620

Sikafloor®-1620 is a state of the art, multi-component, high solids, low viscosity, moisture tolerant, epoxy primer that forms a dense, low permeability film on concrete substrates to significantly reduce moisture vapour transmission in compliance with ASTM F3010.

Sikafloor®-1620 contains a blue trace dye that acts as a visual aid to ensure complete coverage.

Recommended uses

Sikafloor®-1620 is designed to treat high moisture concrete substrates where Sikafloor ® , Sikagard ® and Sikalastic ® resin systems are due to be installed where a measured moisture content up to 6 % (p.b.w. – part by weight), as determined with a Tramex® CME / CMEXpert concrete moisture meter.

Features

• Economical single coat application
• Low permeability ~0.06 perms (15 mils d.f.t) ASTM E96
• Exceeds the requirements of ASTM F3010 Standard Practice For Two-Component Resin Based Membrane-Forming Moisture Mitigation Systems For Use Under Resilient Floor Coverings
• Cured resin resists high moisture vapour emission rates (MVER) up to 25 lbs as per ASTM F1869, 100 % R.H. as per ASTM F2170 and resist high alkalinity to pH 14
• Low viscosity provides superior penetration and stabilization of cementitious substrates.
• Resistant to substrate out-gas bubbling
• High bond strength
• Low odour and low VOC

Packaging

Components A+B: 15.12 L (4 US gal) Component A: 11.34 L (3 US gal) Component B: 3.78 L  (1 US gal)

APPROVALS / CERTIFICATES

Meets the requirements of CFIA for use in food plants

Shelf Life

2 years in original unopened container under proper storage conditions

Storage Conditions

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®-1620 has frozen, contact Sika Canada.

Viscosity

~370 cps (ASTM D2196)

Solid content by volume

~99%

Shore D Hardness

~83 (ASTM D2240)

Compressive Strength

~99 MPa (~14,385 psi) (ASTM D695)

Tensile Strength in Flexure

~83.8 MPa (~12,154 psi) (ASTM D790)

Tensile Strength

~34 MPa (~4,931 psi) (ASTM D638)

Pull-Off Strength

~3 MPa (~435 psi) (100% concrete failure) (ASTM D7234)

Permeability to Water Vapour

~0.06 perm (at 15 mil d.f.t) (ASTM E 96)

Water Absorption

~0.0029% (24 hrs) ~0.007%  (7 days) (ASTM D570)

Mixing Ratio

A:B = 3:1 (by volume)

Product Temperature

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

Ambient Air Temperature

Minimum: 10 °C (50 °F) / Maximum: 30 °C (86 °F) Note: Mixing carried out under conditions where the Sikafloor®-1620 temperature and ambient temperature are below 18 °C (65 °F) will result in reduced product workability and slower curing rates.

Relative Air Humidity

Maximum 85 % (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: 30 °C (86 °F) Note: Any attempt to apply Sikafloor®-1620 at substrate temperature conditions less than 18 °C (65 °F) will result in an increase in viscosity and slower cure rates

Substrate Moisture Content

Moisture content of concrete substrate must not exceed 6 % by mass (p.b.w. – part by weight) as measured with a Tramex® CM/E concrete moisture meter on a mechanically-prepared surface (mechanical preparation to ICRI / CSP 3-4).

Pot Life

Material Temperature Time 20 °C (68 °F) ~35 minutes

Curing Time

Ambient & Substrate Temperature Foot Traffic Full cure 10 °C (50 °F) ~36 hours ~10 days 20 °C (68 °F) ~18 hours ~07 days 30 °C (86 °F) ~08 hours ~04 days Note: 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 72 hours following the end of the application.

Consumption

2.6 m 2 /L (106 ft 2 /US gal) at 15 mils w.f.t. per coat Note: Actual coverage rates and material consumption will depend upon porosity and profile of substrates. Test sections are recommended to establish correct coverage.

SUBSTRATE QUALITY

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®-1620.

MIXING

Mix Ratio: Components A:B = 3:1 (by volume) IMPORTANT: Do not hand mix Sikafloor ® materials; mechanically mix only. Sikafloor®-1620 must be applied as supplied. Pre-stir Components A and B separately, making sure all solids, including trace dye, are evenly distributed and uniform consistencies are achieved within each individual Component. 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 minimize entrapped 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®-1620 should be uniform in appearance and consistency. Note: Prepare only the amount that can be applied within the open time (i.e., during the pot life) and at the actual job site temperature.

APPLICATION

Concrete with Measured Moisture Content < 6 % Apply one (1) coat of Sikafloor®-1620 with a squeegee at the rate of 2.6 m 2 /L (106 ft 2 /US gal) at 15 mils w.f.t. thickness and back roll with pressure after 20 minutes. Coverage will vary depending on the porosity and profile of the prepared substrate. Do not apply by dipping roller into mixing container or a paint tray; instead pour a bead of the mixed material, in the form of a ribbon, onto the surface to be coated and then spread with a squeegee and back roll. Ensure that the Sikafloor®-1620 prime coat is pore- and pinhole-free and provides uniform and complete coverage over the entire concrete substrate. Concrete with a Measured Moisture Content > 6 % Apply a minimum 3 mm thick layer of Sikafloor ® -81 EpoCem ® CA following the application instructions published on the product data sheet. Once cured, apply one (1) coat of Sikafloor®-1620 with a squeegee at the rate of 2.6 m 2 /L (106 ft 2 /US gal) at 15 mils wet film thickness and back roll with pressure after 20 minutes.   Do not apply by dipping roller into mixing container or a paint tray; instead pour a bead of the mixed material, in the form of a ribbon, onto the surface to be coated and then spread with a squeegee and back roll. Ensure that the Sikafloor®-1620 prime coat is pore- and pinhole-free and provides uniform and complete coverage over the entire Sikafloor ® -81 EpoCem ® CA substrate.

CLEAN UP

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

Cure time

Ambient & Substrate Foot Traffic Full cure Temperature 10 °C (50 °F) ~36 hours ~10 days 20 °C (68 °F) ~18 hours ~07 days 30 °C (86 °F) ~08 hours ~04 days

Application temperature

Minimum: 10 °C (50 °F) / Maximum: 30 °C (86 °F)