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DESCO INDUSTRIES INC TECHNICAL BULLETIN TB-7039 Statguard® Conductive Epoxy Application Instructions Color of Epoxy: RAL 7038 / Pantone 5517C Figure 1. Statguard® Conductive Epoxy, Parts A and B Test Patch Requirement A test patch on new applications is required to receive a full product warranty. Prior to the shipment of your Statguard® Conductive Epoxy, Desco Industries Inc. (DII) will provide samples and technical documentation for installing the test patch. The test patch will allow for a full evaluation of the floor preparation and of our Statguard® Conductive Epoxy, performance features to include color, adhesion, physical properties and electrical resistance. Test Patch application instructions are located in the Surface Preparation section. Complete Statguard Flooring's Test Patch Approval Form. If your test patch is on a bare or prepped concrete surface, we recommend Bulls Eye® Water-Base Primer and Sealer to achieve proper performance of the Statguard® Conductive Epoxy properties. Please contact Rust-Oleum for additional product details. Description Statguard® Conductive Epoxy is a waterborne, two-part epoxy floor coating formulated to control the dissipation of static electricity and provide path to ground. Statguard® Conductive Epoxy is very effective as a static control floor coating for electronics manufacturing, assembly, and storage. It is available in light grey RAL7038 / Pantone 5517C, in 4 gallon (15.14 liter) kits. The color may vary between production lots. Statguard Conductive Epoxy meets ANSI/ESD S20.20 and EN 61340-5-1 required limits of < 1 x 109 ohms for ESD flooring and is suitable for the flooring component in Footwear / Flooring Systems (< 1 x 109 ohms per ANSI/ESD STM97.1 and IEC 61340-4-5 and < 100 peak body voltage per ANSI/ESD STM97.2) Made in the United States of America Per ESD Handbook ESD TR20.20 ESD Floor section 5.3.4.7.3 “Epoxy and Polymeric Overlayments...have good chemical, solder, and abrasion resistance and will withstand heavy vehicle traffic. They are easier to maintain in comparison to other materials. They are seamless and can be used in many clean room environments. However, they cannot be used on access floor panels. Because epoxies are virtually manufactured on-site, proper installation techniques are critical to the successful performance of this type of material.” Per CLC/TR 61340-5-2 User guide sub clause 4.7.3.6.2.4 Paints and coatings “Paints and epoxy coatings are applied to concrete floors in thin coats. The primary advantages of these materials are their ease of application and coverage over a wide area. They have a longer usable life than do floor finishes, but less than permanent floor materials. Paints and coatings tend to wear off in time and shall be reapplied on a continuing basis. Some materials are not applicable for clean rooms because they abrade or chip away or are highly loaded with carbon.” Statguard® Conductive Epoxy applied in excess of 20 square feet (1.8 square meters) enable the surface to dissipate 5000 volts to zero in less than 0.01 seconds per FTMS 101C, Method 4046 without conventional grounding grids or wires. The conductive coating becomes a capacitive reservoir that effectively drains static charges. ESD footwear is to be used in conjunction with Statguard® Conductive Epoxy to ground personnel. When using foot grounders on our Statguard® Conductive Epoxy its max 23 volts walking (Reference: ANSI/ESD STM97.2) at 15%RH. Standing is near Zero. When using our Statguard® Conductive Epoxy with Statguard® Low-VOC Dissipative Floor Finish (coated) its similar results at 24 volts at 15%RH. As humidity increases voltages go lower towards zero. Table 1. Walking and Standing Voltage Summary Floor Sample Shoe Grounder Epoxy Heel Epoxy Epoxy Standing Voltage 15%RH Walking Voltage 50%RH 15%RH 50%RH 0 -1 23 3 Full Sole 1.5 -3 8 3 Full Sole 0 -3 9 3 Coated Epoxy Heel 1 0 24 4 Coated Epoxy Full Sole 9 -1 11 -2 Coated Epoxy Full Sole 0 0 13 3 DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 1 of 6 February 2021 © 2021 DESCO INDUSTRIES INC Employee Owned NOTE: The product should not be allowed to freeze. If the epoxy part A or part B freezes surround the closed container with hot water to thaw completely and melt the crystals back into liquid. Make sure epoxy is then brought up to room temperature 70°F (20°C) before mixing and using. Storage temperature: 1°C - 49°C (34°F - 120°F) as stated in the Safety Data Sheet. We recommend that these products be stored in their original containers and be sealed when not in use. We cannot guarantee performance if not properly stored, mixed or not installed before 3 months from date of sale. Moisture and pH Testing Moisture in Flooring For applications on concrete or porous surfaces, excess moisture in or below the material or concrete slab is the cause for many coating failures. Failures such as bond failures, warping, peeling, and bubbles can appear months or years later due to the flow of moisture or moisture vapor through concrete. Ways to avoid such failures include: placing concrete over an efficient vapor barrier, use low water-cement ratios in the concrete mix, adequately cure concrete, and test and measure moisture transmission using industry-standard In Situ Probes type test kits, per ASTM F2170. The moisture levels cannot exceed 6 lbs. per 1,000 square feet per 24 hours a day. Moisture Testing Measure the MVTR of the concrete prior to installation, using the industrial standard test probes per ASTM F2170. The moisture levels cannot exceed 6lbs. per 1,000 square feet per 24 hours a day. Ensure that your floor is porous and breathing well before performing the test. If it is nonporous, then sand it with very abrasive sandpaper to open it up. It is porous enough when a few drops of water dropped on the surface readily absorb within 30 seconds. One test should be performed at every 1,000 square feet of space. Note: Keep in mind, that even if a moisture test shows that the floor has acceptable moisture levels, it is only at the time of the test that the levels were acceptable. It is possible for the weather, sprinkler systems, or other causes to bring the floor to unacceptable levels of moisture. Therefore, it is very important that some moisture vapor control and prevention was built for the floor as well, in the way of a moisture barrier. If no moisture barrier exists, then one should be installed. Any on or below grade slab should have a moisture barrier, according to industry standards. These recommendations are about our products ability to bond to sub floors. Limitations • Do not install when the moisture vapor emission rate (MVER) exceeds 6 lbs. per 1000 sq. ft. (2.72 kg per 92.9m2) per 24 hours, when using the anhydrous calcium chloride test (ASTM F1869) • Do not install with relative humidity of concrete slabs exceeds 75% (ASTM F2170) • Use only when the substrate temperature in between 65°F and 85°F (18°C and 29°C) Warning: Moisture levels greater than the above mentioned may negatively affect the drying/curling process, bond strength to the substrate, as well as hardness of the finished film. pH Testing The proper floor pH before applying our product should be 7 (neutral). We recommend you test the floor pH prior to installing the Statguard® Conductive Epoxy to confirm. If the floor tests above pH7 the floor must be neutralized before installing the Statguard® Conductive Epoxy. Subfloor Preparation Concrete Floors, Poured Concrete Cure at least 30 days. Acid etch or abrasive blast slick, glazed concrete or concrete with laitance. Test for moisture vapor content. Use compatible epoxy primer on concrete. Concrete as Underlayment This should be heavy weight, or a manufacturer’s guaranteed cement mix, installed according to manufacturer’s specs. An out-of-level floor needs to be leveled by an experienced installer. Use a Portland cement type-leveling compound that will provide a minimum 3,500 PSI compressive strength (ASTM C109), be sufficiently bonded to the floor and properly dried prior to installation of flooring. Failures can occur from patch or leveling compound not given sufficient time to dry. Concrete Sub-Floor Preparation ASTM F710 - 11 should be followed in preparing concrete sub floors to receive floor coatings. Fill all cracks, depressions, etc. with the leveling compounds according to manufacturer’s specifications. The sub floor needs to be clean, dry, smooth, level, structurally sound and free of dust, solvent, oil, grease, wax, paint, sealing compounds, old adhesive, or other foreign materials. Remove any curing, hardening, or breaking compounds using mechanical means, not solvents or chemicals. Epoxy primer should be used to prepare bare and prepped concrete surfaces. Use a compatible primer such as Bulls Eye® Water-Base Primer and Sealer. Installing Statguard® Conductive Epoxy on improperly prepared surfaces will void product warranty and cause product failure. Previously Painted Surfaces Old coatings should be tested for lifting. If lifting occurs, remove the lifted coating. Otherwise, scuff or sand glossy areas and aged epoxy coatings. Clean aged epoxy or urethane coatings. Remove cracked and peeling paint. DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 2 of 6 © 2021 DESCO INDUSTRIES INC Employee Owned New Surfaces Steel - New steel surfaces should be initially blasted to near-white metal surface cleanliness. Before Applying Adhesion Testing Test patch areas should be tested for adhesion performance of the coating before applying coating to the entire floor. A licensed contractor is recommended to perform proper moisture testing and adhesion testing. To best ensure consistent results, the test should be done at various locations. Allow newly applied coating to dry a minimum of 48 hours before proceeding with the test. At humidity levels over 55% RH, allow 72 hours of drying time before testing. The surface must be clean, dry, free of oil, grease, form release agents, curing compounds, laitance, other foreign matter and be structurally sound. Remove all loose paint, mortar spatter, mill scale, and rust. It is highly recommended that you do some bonding tests with Statguard® Conductive Epoxy, and primer if required, on your prepared floor in a small area of the flooring, let it sit 72 hours and check bond to see if it is good and no moisture or any other problems are present. Galvanized Steel - Remove dirt and oils by solvent cleaning followed by a thorough water rinsing. Concrete Block - Remove loose aggregate and repair voids. NOTE: FOR INTERIOR USE ONLY. NOT INTENDED FOR EXTERIOR USE. Epoxy primer is recommended for applications on bare and prepped concrete surfaces. Use of a compatible primer such as Bulls Eye® Water-Base Primer and Sealer. Statguard® Conductive Epoxy on improperly prepared surfaces will void product warranty and will cause product failure. Test Patch Application Procedure Application tools 1/8" Notched Squeegee - Statguard® Conductive Epoxy may be spread using a 1/8” notched squeegee to uniformly spread and bring the epoxy to the proper thickness before rolling. 3/8" Nap Roller – Use a 3/8” Nap roller that is rated for epoxy use. Mixer tool – use an industrial paint mixer blade designed for 2 part epoxy and an electric mixer. Statguard® Conductive Epoxy Test Patch Application Instructions: 1. Tape off a 50 square feet area 2. Prep test patch area per technical bulletin 3. Mechanically mix up the pre measured epoxy kit – note 30 minute pot life 4. Pour a ribbon of epoxy onto the prepared floor 5. Spread epoxy evenly on the floor using a 1/8” notched squeegee 6. Back roll in both directions using a 3/8" Nap epoxy roller Note: If the test patch area is bare or had any texturing done to remove prior coatings and open up the pores of the concrete surface a compatible epoxy primer will be required . The gloss of the Statguard® Conductive Epoxy will depend on the resulting floors surface texture from the primer. Reducing the surface texture with a thicker or multiple coat primer can improve the gloss of the Statguard® Conductive Epoxy. Test patch(s) are a great way to demonstrate primer thickness options to gain the desired gloss. Use a razor to cut a cross or a few perpendicular lines over a 3" by 3" (75 mm by 75 mm) area on several spots of the thoroughly dried area. Use a piece of masking tape to cover the marked area. Make sure the tape is thoroughly adhered to the test area. Pull the tape off the surface and examine the amount of coating which has peeled off during the test. If any significant portion is transferred to the tape, better surface preparation (acid etching, cleaning or sanding) should be done on the substrate to enhance the adhesion. Mixing Statguard® Conductive Epoxy is a two-component product supplied in 4 gallon kits which contain the proper ratio of ingredients. The entire contents of each container must be mixed together. Mix Part A (1 gallon) to Part B (3 gallon). Power mix the base portion first to obtain a smooth, homogeneous condition. After mixing base portion B, add the converter slowly with continued agitation. After the converter add is complete, continue to mix slowly. Use immediately after mixing. Mixed material is usable for 30 minutes after mixing. If it thickens, do not add thinner, but discard and mix fresh material. Thinning NOT RECOMMENDED - CAUTION: Adding water will reduce conductivity of coating. Spread Rate Estimated Coverage Per Gallon = 200 sq ft. at an 8 mil (0.008" thick) wet application dries to a 4 mil coating. Apply at 200 sq. ft. per gallon (5-6m2/L) depending on surface texture and porosity. Make allowance for any losses due to surface irregularities. Application Statguard® Conductive Epoxy should be applied using a 1/8" notched squeegee to spread the epoxy evenly on the surface and then back rolled in both directions with the 3/8" Nap roller for epoxy use. With a properly DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 3 of 6 © 2021 DESCO INDUSTRIES INC Employee Owned prepped sub floor only one 8 mil wet coating is needed. If thicker coating is applied the dry time will be longer. conjunction with Statguard® Conductive Epoxy to ground personnel. If a higher gloss is required and reducing the floor texture with a primer is not an option then a second coat of Statguard® conductive epoxy can be applied 24 hours after the 1st coat has dried. The 2nd coat should be applied by pouring mixed epoxy into a paint roller tray and rolling the epoxy on the floor in both directions with a 3/8" Nap roller for epoxy use. Note 30 minute life on mixed epoxy. Note that each gallon should cover 200 sqft. Clean Up Grounding Conventional grounding practices like connecting coated surfaces to equipment or earth ground is recommended for meeting ANSI/ESD S20.20, EN 61340-5-1 and ISO 9000 recommendations for verifying grounds. However the following is also true of conductive epoxy flooring “Floor finishes … function by two separate mechanisms. First, they reduce the surface’s tendency to generate a static charge. Second, they provide a path for the dissipation of charge. The charge may dissipate over the surface of the finish or it may dissipate to ground if the floor finish is grounded.” [Per ESD Handbook ESD TR20.20 section 5.3.4.2] Four examples on how to achieve connection to the epoxy surface are: 1. Install a Statguard® ESD Floor Ground Strip per 1,000 square feet throughout the installation. 2. Bring epoxy coating in contact with a building ground rod 3. Install a grounded lag bolt to the floor so the bolt comes in contact with the epoxy when screwed in place 4. Bolt a grounded metal plate to the epoxy surface. Statguard® Conductive Epoxy applied in excess of 20 square feet (1.8 square meters) enable the surface to dissipate 5000 volts to zero in less than 0.01 seconds per FTMS 101C, Method 4046 without conventional grounding grids or wires. The conductive coating becomes a capacitive reservoir that effectively drains static charges. ESD footwear should be used in Statguard® Conductive Epoxy is best cleaned using water. Do not use any wet maintenance until 7 days after installation. Drying It is recommended that Statguard® Conductive Epoxy be allowed to dry for 12-24 hours at a temperature in excess of 55°F (13°C) and under 90°F (32°C) with 50% RH. Depending on the condition, it will take 3-7 days for a complete cure and hardening of the coating. Cleaning and Maintenance Dry Maintenance Use sweeper, vacuum, or broom to remove dirt. Allow the full 7 days for a full cure before using a damp mop or any wet maintenance to clean the coated area. Do not use abrasive cleaners, solvents or scrubbing machines with coarse pads to clean the floor. A scrubbing machine can be used with a non-abrasive pad. Wet Maintenance Equipment needed: • Statguard Stripper diluted 3:1 • Steel stiff bristle • Plastic stiff bristle • Low speed buffing machine • 100-300 rpm • Mop and bucket • Wet dry vacuum 1. Mix Statguard® stripper and mop onto floor are to be cleaned, let sit for 5-8 minutes to help lift dirt off the surface. 2. Use Steel stiff bristle with low RPM buffer to help left and remove dirt from the epoxy surface. 3. Using a Wet dry Vacuum or mop, remove the loose dirt and used stripper from the floor. 4. Rinse the floor to remove any stripper residue left on the floor. 5. Once floor is dry – use plastic stiff bristle and low RPM buffer to go over the clean area to restore the gloss on the epoxy. Optional Finish / Sealer Statguard® Conductive Epoxy can be over-coated or sealed with Statguard® Dissipative Floor Finish to increase durability, enhance shine, improve ease of maintenance, and seal out dirt and debris. It is a polymer base floor finish/ sealer that can be used as a top coat on the Statguard® Conductive Epoxy Coating. Surface resistance will then be in the 1 x 106 to < 1 x 109 ohm range. Two coats are recommended. Three coats will improve electrical properties, durability and reduce frequency of maintenance. Ask for Technical Bulletin TB-7042 for more information on Statguard® Dissipative Floor Finish. DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 4 of 6 © 2021 DESCO INDUSTRIES INC Employee Owned Physical Properties Type Water based conductive 2 part Epoxy Color Light Grey Pot Life 30 minutes Vehicle Type Waterborne Epoxy Pigment Type Lead free, inorganic pigment, tin antimony oxide, TiO2 Viscosity @ 25°C Part B pigment side: 2100-2600 cps; 75-80 KU Part A clear resin side: 600-1000 cps; 75-80 KU Mix Ratio 3:1 by volume B:A 2500-3000 cps; 83-88 KU Flammability Non-flammable Flash Point Part A: 121 °C (250 °F) Part B: 95 °C (203 °F) Solids On mixed basis by Volume 50% By weight 63% Coating Density On mix basis 10.75 lbs per gallon Gloss Varying on application type and thickness, 15 to 35 CV’s on a 60° angle Temperature Range Wet: 50°F - 110°F (10°C 43°C) Dry: 33°F - 303°F (1°C 149°C) Test the surface resistance point to point (Rtt or Rtg), and resistance-to-ground (Rtg or Rg) properties of coated area per ANSI/ESD S7.1 or Compliance Verification ESD TR53 at initial installation and quarterly. For quick and easy verification of the coating, we recommend using a Desco Industries Surface Resistance Test Meter Kit. Figure 2. D19290 Statguard Flooring Surface Resistance Meter Kit Abrasion Resistance ASTM D4060 0.07 g (Tabor CS 17 1000 cycles with 1000g load) Impact ASTM D2794 160 lbs direct with no effect Flexibility ASTM D522 Passes 0.5” mandrel bend test MEK Rub ASTM D5402 100 MEK double rub did not touch the film Electrical Properties Rtt 1 x 104 to < 1 x 107 ohms per ANSI/ESD S7.1 or IEC 61340-4-1 Rtg 1 x 104 to < 1 x 107 ohms per ANSI/ESD S7.1 or IEC 61340-4-1 DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 5 of 6 © 2021 DESCO INDUSTRIES INC Employee Owned RoHS 2, REACH, and Conflict Minerals Statement None of the RoHS 2 restricted materials or REACH (Registration, Evaluation and Authorization of Chemicals) substances of very high concern as of 2020/06/25, or Conflict Minerals are intentionally added in manufacturing this product. Ref: European Union Directive 2015/863/ EU and Regulation (EC) No. 1907/2006/CE. Statguard® Conductive Epoxy is available from these Desco Industries brands: for service and support in North America 4 Gallons 46057 EUROPE for service and support in United Kingdom 15 Litres 210225 for service and support in Asia 15 Liters 46057 DESCO INDUSTRIES INC - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Website: DescoIndustries.com TB-7039 Page 6 of 6 © 2021 DESCO INDUSTRIES INC Employee Owned