Purpose and Scope Instructions for installation of Dex-O-Tex Tek-Crete SL CQ flooring, Standard Application over previously prepared concrete. Thickness Standard...1/4 (4.7mm) or 3/8 (6.35 mm) ALTERNATE: is available in Standard and Heavy Duty Versions. Use 3/8 thickness for very high abuse and/or thermal shock exposure. See separate CPC Standard Application Specification for instructions for application of the standard system. NOTE: Tek-Crete systems are high performance flooring systems designed primarily for their superior ability to function under extreme abusive operating conditions. Their Esthetic appearance is pleasing but not of the same high quality designer appearance provided by Dex-O-Tex decorative flooring systems. Approximate Quantity of Materials Required To Cover ONE HUNDRED SQ. FT (9.3 sq. meters) Description/Packaging Amount Required Coverage 1/4 3/8 1/4 3/8 Tek-Crete SL Liquid Component A (1 gal. can) Component B (0.8 gal. can)... 3.5 un... 4.5 un... 30 sf... 22 sf Description/Packaging Amount Required Coverage Posi Tred CR Clear/Amber Unit 5 (2 coats @ 160 sf per coat) Component A (3 gal Component B (2 gal)... 0.44 un... 0.44 un...160 sf...160 sf Equipment Required Clean mixing vessels Koal type bucket mixer, or Low speed ¾ drill ¼ high speed drill (minimum RPM=275) Paddle type mixing blade (Crossfield) Small Drill Small Jiffy blade Gauge Rake Rectangular cement finishing trowels Loop roller covers (Stucco type roller) Spiked Roller Covers Spiked Roller Covers Short-nap (1/4 ) roller sleeves, handles, extension poles and roller pan Brief of Installation 1. Prepare substrate, detail cracks, joints, and terminations, Cut in keyways. 2. Option apply Primer/Sealer 3. Option apply Cove Base 4. Apply Tek-Crete SL Basecoat 5. Apply Quartz Surfacing 6. Apply Grout and Seal Coats Tek-Crete "SL" Aggregate (44 lb. bag)... 3.5 bgs. 4.25 bgs... 30 sf... 22 sf Color Quartz Aggregate (50 lb. bag)... 4 bgs... 4 bgs... 25 sf... 25 sf Quik-Glaze Unit 1.5 ( 2 coats @ 160 sf per coat) Component A (1 gal) Component B (1/2 gal)... 1.1... 165 sf Or Quik-Glaze Unit 3 (2 coats @ 160 sf per coat) Component A (2 gal) Component B (1 gal)... 0.55... 165 sf ALTERNATE: Posi Tred CR Sealer can be used in lieu of the standard Quik-Glaze. This will provide a much clearer esthetically pleasing top coat with a faster cure time and provide approximately the same performance characteristics. Surface Preparation Concrete Surface Must be free of laitance, dirt, dust, grease, oil, paint and any other contaminates. Prepare substrate in accordance with SSPC SP13. Shotblasting is the preferred method of preparation. Power wash with mechanical scarifying are other methods that can be used (Consult Dex-O-Tex Concrete Surface Preparation Spec S-2). Other Surfaces Consult Crossfield Products Corp. Keyway s Due to the high surface tension of the Tek Crete system, keyway s must be cut into the substrate to provide Dex-O-Tex Application Specification Page 1 of 7 Tek-Crete SLCQ (Severe Service Application)
proper long term adhesion to the substrate. Keyway s should be a minimum ¼ X ¼ and cut in at all perimeters, around drains, protrusions, cold joints, pour joints, transitions and terminations. For extreme rolling load environments keyway s should also be cut in at every control joint and a minimum 12 on center across the entire floor surface. Job Site Survey A. Perform moisture testing in accordance with one of the following methods: Environmental Conditions All materials are mixed, applied and cured at the job site. Minimum environmental conditions are required to facilitate proper curing and Performance of the Products. Ensure conditions are in accordance with the following requirements. Ambient Min Max Temperature 45 O F 100 O F Relative Humidity 20% rh 85% rh Wind NA 20 mph ASTM F1869 Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride. Verify and document the results in accordance with the specification. If MVER exceeds 10 lbs./24 hrs./1000 sq. ft. and under 15 22* lbs./24 hrs./1000 sq. ft., apply VaporControl Primer 100 as per application specification S-972. ASTM F2170 Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes. Verify and document the results in accordance with the specification. If the in-situ relative humidity (rh) is greater than 84%, and less than 89 99%*, apply VaporControl Primer 100 as per Application Specification S-972. *Apply VaporControl Primer 100 at the specified thickness required as per Application Specification S-972 for the level of MVER or in-situ relative humidity percentage of the substrate. B. Inspect substrate to verify proper preparation before applying any materials. C. Measure and record ambient temperature and humidity, surface temperature and the temperature of the material being used. Do not proceed with the application if the conditions are outside the recommended parameters. D. Inspect materials to be used. Verify material is the proper material and all components and sizes are correct. Inspect all containers and verify a proper factory seal with no signs of damage or leakage. Premix Liquid materials into a smooth homogenous blend before uses. Substrate Temperature 55 O F 90 O F Relative Humidity NA 88% MVER NA 14 lbs* Materials Temperature 60 O F 85 O F *14 lbs of MVT, per 1000 sq. ft. during a 24 hr. period as measured by ASTM F1869. Materials should be delivered in original packages and containers with seals unbroken and bearing manufacturer's labels containing brand name and directions for storage and mixing with other components. Check materials immediately upon receipt, verify all the correct materials in the correct packaging are accounted for in good condition. Sort the materials and store them in a tempered storage area. OPTION Cove Base Although an integral cove base is a typical feature of the Tek-Crete Flooring systems, it is an option. As part of the Heavy Duty system, the cove base is installed prior to the flooring with a radius troweled in flush against the floor surface. (For Standard Base Requirements see CPC Standard Application Specification for instructions for application of the Standard Cove Base system). Cove Base 100LF of 3/16 X 6 base with ¾ Radius Description/Packaging Amount Required Coverage Tek-Crete Liquid Comp. A. (.45 gal. can) 50 LF per un Comp. B. (.35 gal. can)... 4 un... Tack Coat Dex-O-Tex Application Specification Page 2 of 7 Tek-Crete SLCQ (Severe Service Application)
Tek-Crete VRT Aggregate 50 LF per un (20 lb. bag)... 2 un... Cove Base Tek-Crete VRT Aggregate (40 lb. bag)... 2 un Color Quartz Aggregate (50 lb. bag)... 2 bgs... 50 ln per bag Cove Base Gel Unit 3 Comp. A. (2 gal. can) Comp. B. (1 gal. can)... 0.28 un... 350 lf per un The application of base or wall surfaces are installed in two successive applications - a tack coat of a nominal 1/16" thickness and a basecoat and decorative quartz finish at a nominal 1/8 thick. STEP ONE TACK COAT Tek-Crete VRT Tack Coat w/25lbs Aggregate Mix Ratio: 1A:0.8B: 1C* Pot Life: 15 mins Cure Time: 6 hrs Recoat Time: 2-4 hrs Coverage: 50 LF DFT: 35 mils *One 20 lb bag Tek-Crete VRT Aggregate Pour contents of Component B (0.35 gal. container) into Component A (0.45 gal. container) and blend thoroughly for approximately 3 minutes with a small Jiffy blade powered by a hand drill. Pour the blended A& B Components into a large vessel and while blending with a large blade, add the Tek-Crete VRT Aggregate (20 lbs.) and mix thoroughly (about 2 minutes) until the particles are well wetted out. Apply the mix to a nominal 1/16" thickness using a steel trowel. This mixture forms the Tack-Coat that should be applied to all areas to which base will be applied. Allow the Tek-Crete VRT Tack-Coat to firm up (approximately two hours) but still be tacky. Proceed with application of the Cove Base while the tack coat is still tacky. STEP TWO COVE BASE Tek-Crete VRT Cove Base w/40lbs Aggregate and **DFS Quartz Aggregate Mix Ratio: 1A:0.8B: 1C * Pot Life: 15 mins Cure Time: 6 hrs Recoat Time: 2-4 hrs Coverage: 50 LF DFT: 70 mils *One 40 lb bag Tek-Crete VRT Aggregate ** DFS Aggregate Required for finish of cove base Pour contents of Component B (0.35 gal. container) into Component A (0.45 gal. container) and blend thoroughly for approximately 3 minutes with a small Jiffy blade powered by a hand drill. Mix one unit of Tek-Crete Liquid with one bag (40 lbs.) of Tek-Crete VRT Aggregate. Over the still-tacky Tek-Crete VRT Tack-Coat apply Tek-Crete VRT Base Coat in a single application (for a 3/16" thick base). Immediately after the VRT material has been initially placed on the wall, broadcast the **DFS quartz aggregate into the VRT mortar. Begin to finish trowel the cove base, broadcast or push additional DFS quartz aggregate into the surface of the cove base until the cove base has the appearance of a quartz finish. Each coat (including Tack-Coat) of mix described above will spread approximately 50 linear feet of a 6 inch cove bas with a 3/4 radius. IF OPTIONAL BASE WAS APPLIED Cove Base Grouting Cove Base Gel Mix Ratio: 2A:1B Pot Life: 35 mins Cure Time: 6 hrs Recoat Time: 6-48 hrs Coverage: 350 LF per gal DFT: 8 mils A. Mix together the following materials: Cove Base Gel Comp A... (2 Parts by Volume) Cove Base Gel Comp B... (1 Part by Volume) Measure out the required amount of Component A and Component B and pour into a clean mixing container, scraping the sides and bottom of cans to insure all materials are used. Mix with a low speed electrical mixer for approximately three minutes to a homogenous blend. B. A One and a half gallon (1 gal A: ½ gal B) mixture should cover approximately make enough material to grout approximately 525 lineal feet of 6 cove base. Dex-O-Tex Application Specification Page 3 of 7 Tek-Crete SLCQ (Severe Service Application)
C. Apply the mixed Cove Base Gel resin to the vertical surface in a thin coat of with paint brush. Work to material into the porosity of the cove base. After approximately 10-15 minutes, go back and brush the material back up onto the surface of the cove base. After an additional 5-10 minutes, use an 8 double bladed red or white rubber squeegee to pull off any excess resin that has sagged down along the bottom of the base. Allow to cure before proceeding with application of the flooring basecoat. OPTION Priming of the Concrete Substrate If the concrete surface is old and porous or you have a MVER of over 10lbs/1000sf/24hrs, it is recommended to use VL Primer on the surface in order to seal the porosity of the substrate and reduce the out gassing during application of the Tek-Crete SL Basecoat. VL Primer Mix Ratio: 2A : 1B Cure Time: NA Coverage: 350 SF Pot Life: 2 Hrs Recoat Time: Into tacky DFT: 2-3 mils A. Mix together the following materials: VL Primer Comp A... (2 Parts by Volume) VL Primer Comp B... (1 Part by Volume) Measure out the required amount of Component A and Component B and pour into a clean mixing container, scraping the sides and bottom of cans to insure all materials are used. Mix with a low speed electrical mixer for approximately three minutes to a homogenous blend. B. Apply a thin coat of VL Primer using a trowel, squeegee, or roller over the area to be coated. Do not allow primer to puddle or be applied too thick. A Three Gallon Kit (2 gal A: 1 gal B) mixture should cover approximately 1050 square feet (350 sq. ft. / mixed gallon) over smooth surface. Allow to take an initial set (VL Primer will start to turn clear) Proceed immediately with application of Tek-Crete SL Basecoat into tacky primer. APPLICATION - CAUTION It is important to mix and apply the mixed material quickly- this is a fast curing product and the pot-life is short (10 to 15 minutes). The Tek-Crete SL should be mixed, placed, backrolled, and spike rolled all within this 10-15 minute working time. Care must also be taken to always work into a wet edge. CAUTION Temperature (surface, materials, ambient) is important when applying Tek-Crete. It is extremely important that all temperatures should be in the 50ºF. - 85ºF. range. Temperatures outside this range will result in mixes which are "stiff", hard to trowel, and set fast. STEP ONE -Tek-Crete SL Basecoat Mix Ratio: 1A:0.8B: 1C* Cure Time: 6 hrs Coverage: 22-30 SF Pot Life: 15 mins Recoat Time: 6-48 hrs DFT: 125-185 mils * One bag Tek-Crete SL Aggregate 44 lbs. A. Pour the contents of Tek-Crete SL Liquid Component B (.8 gal.) into Component A (1 gal.) and blend thoroughly with a small Jiffy Blade powered by a hand drill for approx. one minute until a completely homogenous. B. Pour the blended A & B Components into the Koal mixer bucket and while blending add the Tek-Crete SL Aggregate (44 lbs.) gradually and mix thoroughly (about 3 minutes) until the particles are well wetted out. Lower temperatures require longer mixing times - up to 5 minutes at 50º F. If Mixing with Drill Motor and Paddle, pour the blended A & B Components into a large mixing vessel and while blending with a large blade add Tek-Crete SL Aggregate (44 lbs.) gradually and mix thoroughly (about 3 minutes) until the particles are well wetted out. Lower temperatures require longer mixing times - up to 5 minutes at 50º F. C. Pour the material in long thin ribbons on the floor. Screed the material into place using a gauge rake or Dex-O-Tex Application Specification Page 4 of 7 Tek-Crete SLCQ (Severe Service Application)
trowel. Place the Tek-Crete SL mixed material at a rate of 30 sq. ft. per mix (1/8" thickness) or 22 sq. ft. (3/16" thickness). Place material so that you can also work back into a wet edge. D. Immediately work out all gauge rake lines and ridges with using a looped roller. Work back and forth slowly to even out material. Be careful not to work air into the Tek-Crete matrix. E. After approximately 3-5 minutes, use a spike roller and roll over the entire floor surface to allow for air release from the Tek-Crete matrix and reduce surface tension to allow for better flowability. F. Immediately proceed with the next step, Broadcast DFS Quartz into the wet Tek-Crete SL mortar CAUTION Do not try and work the material once it starts to set. You can see when the material is beginning to set when it starts to turn from a glossy surface to a satin type of appearance. Once the material reaches this state it will no longer flow and can not be troweled. STEP THREE Broadcasting Aggregate Color Quartz Aggregate OPTION: Color quartz aggregate is available in 50 lbs bags of solid colors or blended colors. Always pre-blend and box mixes of aggregate before application. Coverage: 2 lbs per s.f. per coat 50 lbs. bag 25 s.f A. Immediately after the Tek-Crete SL mortar material has been applied and flows out, the blended quartz aggregate is broadcast into the wet mortar to the point of rejection of the broadcast aggregate. Broadcasting the aggregate may be accomplished by hand or by mechanical Blower Assembly (consult Crossfield Products Corp.). Always loft the aggregate up in the air so that it drops down vertically onto the surface and does not roll. Continue to broadcast aggregate until covered surface looks dry and does not have a wet appearance. This may require broadcasting additional DFS quartz aggregate to some areas as the quartz settles into the basecoat. B. When broadcasting the aggregate, leave a 6 18 (15-45 cm) border of wet mortar at the edge of continuing work into which aggregate has not been broadcast. Apply succeeding application of Tek- Crete SL mortar up to this wet edge border while it is still wet. Continue to work new material into the wet edge and broadcast aggregate in the same manner. C. Care must be taken to thoroughly cover the Tek- Crete SL mortar with DFS quartz aggregate while it is still wet. Make sure the entire area is broadcast to rejection, and all wet spots receive additional aggregate. NOTE: If walking in the Tek-Crete Mortar while broadcasting the aggregate, spiked shoes should be used, and care must be taken no to leave any marks. Never walk on any portion of the floor that has received the broadcast aggregate. D. One bag of blended aggregates will be required to initially cover approximately 25 sq. ft. (2.32m 2 ). Approximately 10% of the blended aggregate can be retrieved for later re-use. CAUTION : In the case of a small installation which is all to be done at one time, or in only two or three pours of Tek-Crete SL Mortar, additional quantities of aggregate (approximately four times that shown on page 1 of this specification) must be on hand as aggregate cannot be recovered for re-use. Allow to cure for approximately 6 hours (at 70ºF.) before proceeding. STEP FOUR Removal and Recovery of Excess Aggregate A. After at least a six hour drying period at approximately 73ºF. (21ºC.) the excess or unadhered aggregates are removed. The surface is then lightly scraped and thoroughly vacuumed to remove all loose or excessively protruding particles. B. The swept-up or vacuumed up aggregates can be reused. Use only a vacuum with a plastic gasket at bottom of vacuum head to prevent metallic discoloration. Sieve the recovered aggregates threw Dex-O-Tex Application Specification Page 5 of 7 Tek-Crete SLCQ (Severe Service Application)
a fine screen to remove contamination and clumps of aggregates. CAUTION: Insure that the final surface of the aggregate is kept clean prior to finish applications of Quik-Glaze Resin and finish sealer. Dirt, dust or stains could be sealed into the surface. Pay particular attention to cleanliness of footwear and knee pads when sealing the floor. STEP FIVE Quik-Glaze Resin Sealer Mix Ratio: 2A:1B: Cure Time: 6 hrs Coverage: 160 s.f. Pot Life: 20 min Recoat Time: 6-24 hrs DFT: 10 mils STEP SIX Quik-Glaze Resin Sealer Light spot sand and detail the surface before proceeding. Apply the second coat of Quik-Glaze Resin as described in step five above ALTERNATE: Optional sealers may be applied for better abrasion resistance, heat resistance, satin or matte finishes. Consult each individual products application specification for application instruction. OPTION If a surface is desired which is smoother and more "filled" than the typical Tek-Crete SLCQ surface, additional seal coats may be applied. A. Mix together the following materials: Quik-Glaze Comp A (2 Parts by Volume) Quik-Glaze Comp B (1 Part by Volume) Measure out the required amount of Component A and Component B and pour into a clean mixing container, scraping the sides and bottom of cans to insure all materials are used. Mix with a low speed electrical mixer for approximately three minutes to a homogenous blend. B. Apply the blended Quik-Glaze Resin materials to the cove base and floor surface. Apply a thin coat to the cove base and spread evenly and fairly liberally over the entire surface using a flat bladed squeegee or 3/8 nap roller and backroll. This material will follow out in approximately 3 to 5 minutes, filling any minor voids or depressions. The Quik-Glaze Resin must be uniform, and free of puddles and ridges. A One and a half gallon (1 gal A: ½ gal B) mixture should cover approximately 240 square feet (160 sq. ft. / mixed gallon). C. The cove base and along the radius and floor transition will start to sag. When this start to occur, use a 8 double blade squeegee with red blades, and pull the excess material off the cove, radius out onto the floor. Then apply the seal coat over the entire floor surface. Cautions 1. Read and follow Crossfield Products Corp. Specification S-900. 2. Obtain, read and observe MSDS for these materials. 3. The components are accurately measured for proper proportion. 4. For proper trowel ability it is very desirable that the Dex-O-Tex Tek-Crete materials when mixed be at a temperature of 60ºF. - 80ºF. (15ºC - 26ºC). This may require several days "conditioning" of materials at such temperature prior to mixing. Cautions for Safe Handling of Epoxy, Polyurethane or Polyurea Materials 1. Read and observe precautionary statements on product labels. 2. Keep containers tightly closed. 3. Remove contaminated clothing and shoes. Wash clothing before re-use. 4. Use of safety goggles and chemical resistant gloves is recommended. Wear only full-length trousers and long-sleeve shirts. Apply protective creams to exposed skin areas. 5. In general, prolonged contact of epoxies, polyurethanes or polyureas with skin may cause irritation. Contact with curing agents or polyurea resins may cause skin burns. Products may cause skin sensitization or other allergic responses. Avoid all contact with eyes. 6. In case of contact with skin, immediately remove the material with soap and water. Upon completion of work at lunchtime or end of day, carefully check all Dex-O-Tex Application Specification Page 6 of 7 Tek-Crete SLCQ (Severe Service Application)
skin surfaces for any traces of resinous materials. Wash with soap and water. If wash facilities are not located nearby, establish water-washing station at work site. Do not use solvents to remove epoxy, polyurethane or polyurea materials from skin, as solvents will drive material deeper into skin. If redness or a skin rash develops, consult a physician. 7. Mix and apply materials only in conditions of good ventilation. Avoid breathing vapors. Appropriate respiratory protection is required when exposure to airborne contaminants may exceed acceptable limits. Respirators should be selected and used in accordance with OSHA, subpart I (29 CFR 1910.134). DEX-O-TEX PRODUCT LINE Crossfield Products Corp. West Coast Office East Coast Office 3000 E. Harcourt Street 140 Valley Road Rancho Dominguez, CA Roselle Park, NJ 90221 07204 310-886-9100 908-245-2800 310-886-9119 fax 908-245-0659 fax www.dexotex.com Dex-O-Tex Application Specification Page 7 of 7 Tek-Crete SLCQ (Severe Service Application)