StoSilco Flex Finish 250,251 & 254

StoSilco ® Flex Finish 250,251,& 254Division 9250 StoSilco ® Flex 1.0251 StoSilco ® Flex 1.5254 StoSilco ® Flex R1.5Mixing Technical DataTEST METHOD CRITERIA RESULTSSurface Burning ASTM E-84 < 25 flame spread 0< 450 smoke developed 5Elongation (%) ASTM D-412 28 days 500*Flexibility ASTM D-5221 ⁄ 8" mandrel bend -30°F (-34°C) PassWater Vapor Permeability ASTM D-1653 28 days 30.1(U.S. perms)Water Absorption (oz/ft 2 /hr) DIN 52-617 1 week 0.27Accelerated Weathering ASTM G-53 2000 hours No deleterious effectsChalk Rating ASTM D-4212 2000 hours 9 (10 = best on scale of 1-10)Yellowness Index ASTM E-313 2000 hours 0.26 (0 = no yellowing;2 = barely discernible yellowing)Freeze/Thaw Resistance Lab Method 25 cycles No deleterious effectsMildew Resistance ASTM G-21 21 days No growthWind Driven Rain Fed TT-C-555B 24 hour driving rain No water penetrationDirt Pick-up Resistance Lab Method 56% red oxide slurry - 1 hour 98% reflectance retainedAdhesion (psi) ASTM C-297 28 days > 115 to concreteTensile Strength (psi) ASTM D-412 28 days > 55VOC (g/L) Calculated 34.4 (48.2**)StoSilco Flex is a ready-mixed,silicone-enhanced textured wallcoating. StoSilco Flex is used asa decorative and protective wallcoating for exterior applicationsover prepared vertical concrete,masonry and Portland cementplaster/stucco surfaces.CoverageStoSilco Flex 1.0: 175-200 ft 2(16.2-18.6 m 2 ) per pailStoSilco Flex 1.5: 140-175 ft 2(13-16.2 m 2 ) per pailStoSilco Flex R1.5: 150-180 ft 2(13.9-16.7 m 2 ) per pailCoverages may vary depending onapplication technique and surfaceconditions.Packaging5 gal. pail (19 L)Shelf Life12 months, if properly storedand sealed.StorageProtect from extreme heat [90°F(32°C)], freezing, and direct sunlight.*Neat Film results**Less water and exempt solvents

250, 251 & 254 StoSilco ® Flex Finish1234567FeaturesHydrophobicNon-thermoplasticElastomericVapor permeableReady-mixedWater-basedLow VOCSurface PreparationBenefitsConcrete and masonry surfaces: Surfacesmust be free of all bond-inhibiting materials,including dirt, efflorescence, form oil and otherforeign matter. Loose or damaged material mustbe removed by waterblasting, sandblasting ormechanical wire brushing and repaired. AvoidMixingMix with a clean, rust-free electric drill and paddle.A small amount of clean water may be added to aidApplicationApply only to sound and clean, dry, properly prepared,frost-free surfaces.Apply StoSilco Flex with a clean stainless steeltrowel to a rough thickness slightly more than thelargest aggregate size. Use the trowel to scrape thematerial down to a uniform thickness no greaterthan the largest aggregate size. Achieve final textureby floating with the appropriate trowel in a figureeight motion; stainless steel trowel for StoSilcoFlex (pebbled texture finishes) and plastic float forStoSilco Flex R (rilled texture finishes). Once applied,the working time is up to 20 minutes dependingupon material, ambient temperatures and surfaceconditions.IMPORTANT: ALWAYS check color for proper match.If color does not match, STOP--call your Sto representative.For best results always prime cementitious substrates.Apply coating in a continuous application,always working from a wet edge or architecturalbreak to eliminate cold joints. Minor shade variationsLimitations• Use StoSilco Flex only when surface andambient temperatures are above 40°F (4°C)during application and drying period.• StoSilco Flex should not be used on horizontal,below grade or water immersed surfaces.Repels water; resists wind driven rainDoes not soften at high temperatures; maximum resistanceto dirt and airborne pollutantsBridges hairline cracksAllows substrate to breathe naturally; resists blisters causedby trapped water vaporReady to use; no additive neededSafe, non-toxic; cleans up with waterSafe for workers and the environmentapplication over irregular surfaces. Resurface,patch or level surfaces to required tolerance andsmoothness with appropriate Sto leveling materials.Refer to ASTM D-4258 and ASTM D-4261for complete details on methods of preparingcementitious substrates for coatings.workability. Limit addition of water to amountneeded to achieve the finish texture.may occur from batch to batch (refer to batch no.on pail). Avoid installing separate batches side-bysideand avoid application in direct sunlight. Avoidinstalling new finish adjacent to weathered or agedfinish. Sto Corp. will not be responsible for shade orcolor variation from batch to batch, variation causedby application or substrate deficiencies, or fadingresulting from natural causes such as weather. SeeTech Hotline Nos. 0694-C, 0893-EC and 1202-CF forhelpful tips on prevention of color problems.Protectinstalled product from rain, freezing, and continuoushigh humidity until completely dry.Curing/DryingDries within 24 hours under normal [70ºF (21ºC),50% RH] conditions.Drying time varies with temperature/humidityand surface conditions.Clean UpClean tools and equipment with water immediatelyafter use. Dried material can only be removedmechanically.• StoSilco Flex is not recommended over interiorwall surfaces.Health And SafetyHealth PrecautionsProduct is water-based. As with any chemicalconstruction product, exercise care when handling.Safety PrecautionsUse adequate ventilation. Safety goggles andprotective gloves are recommended. Removecontaminated clothing immediately.First AidSKIN CONTACT: Wash thoroughly with soapand water.EYE CONTACT: Flush immediately with waterfor 10-15 minutes and contact a physician.RESPIRATORY PROBLEMS: Remove affectedperson to fresh air immediately and contacta physician.HYGIENE: Wash hands immediately after use.Wash clothing before re-use.SpillsCollect with suitable absorbent material such ascotton rags.DisposalDispose of in accordance with local, state orfederal regulations.WarningKEEP CONTAINER CLOSED WHEN NOT IN USE.KEEP OUT OF THE REACH OF CHILDREN. NOT FORINTERNAL CONSUMPTION. FOR INDUSTRIAL USEONLY. Consult the Material Safety Data Sheet forfurther health and safety information.LIMITED WARRANTYTHIS PRODUCT IS SUBJECT TO A WRITTENLIMITED WARRANTY WHICH CAN BE OBTAINEDFREE OF CHARGE FROM: Sto Corp., 3800 CampCreek Parkway, Building 1400, Suite 120,Atlanta, GA 30331; Tel: 404-346-3666;Fax: 404-346-3119ATTENTIONThis product is intended for use by qualified professional contractors,not consumers, as a component of a larger constructionassembly as specified by a qualified design professional,general contractor or builder. It should be installed in accordancewith those specifications and Sto’s instructions. Sto Corp.disclaims all, and assumes no, liability for on-site inspections,for its products applied improperly, or by unqualified persons orentities, or as part of an improperly designed or constructedbuilding, for the nonperformance of adjacent building componentsor assemblies, or for other construction activities beyondSto’s control. Improper use of this product or use as part of animproperly designed or constructed larger assembly or buildingmay result in serious damage to this product, and to the structureof the building or its components. STO CORP. DIS-CLAIMS ALL WARRANTIES EXPRESS OR IMPLIEDEXCEPT FOR EXPLICIT LIMITED WRITTEN WARRANTIESISSUED TO AND ACCEPTED BY BUILDING OWNERS INACCORDANCE WITH STO’S WARRANTY PROGRAMSWHICH ARE SUBJECT TO CHANGE FROM TIME TO TIME.For the fullest, most current information on proper application,clean-up, mixing and other specifications and warranties, cautionsand disclaimers, please refer to the Sto Corp. website,www.stocorp.com.Sto Corp.3800 Camp Creek ParkwayBuilding 1400, Suite 120Atlanta, GA 30331Tel: 404-346-3666Toll Free: 1-800-221-2397Fax: 404-346-3119www.stocorp.comS155-250/251/254 5/07 VEN 5609