sikaflex221 us

7/28/2019 Sikaflex221 Us

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Product Data SheetVersion 7/21/2010

Sikaflex-221One-component adhesive sealant

Technical Product Data (typical values)Chemical base 1-C polyurethane

ColorWhite, black, aluminum gray,colonial white

Cure mechanism Humidity-curing

Density (uncured)10.6 lb/galdepending on color

VOC (EPA method 24) 0.4 lb/gal (48.3 g/l)

Non-sag properties Good

Application temperature product 41F - 104F (5C - 40 C)

Tack free time1 60 min

Open time1 45 min

Curing speed (see diagram 1)

Shrinkage 5%

Shore A-hardness (ASTM D 2240) 40

Tensile strength (ASTM D 412) 260 psi

Elongation at break (ASTM D 412) 500%

Tear propagation resistance (ASTM D 624) 34 pli

Glass transition temperature -49F (-45C)

Movement accommodation factor 12.5%

Service temperature permanent1 day1 hour

-40 - 194F (-40-+90C)248F (120C)284F (140C)

Shelf life (storage below 77F (25C))12 months Cartridges and Unipacs6 months Drums and Pails

1)73F (23C) / 50% r.h.

Description

Sikaflex-221 is a high-quality multi

purpose non-sag 1-c polyurethanesealant that cures on exposure toatmospheric humidity to form adurable elastomer. For US: Meetsapprovals ASTM C920 types andFederal Specifications TT-S-00230C. Sikaflex

-221 is tested and

classified in accordance withANSI/UL 723 Test for SurfaceBurning Characteristics of BuildingMaterials. Sikaflex

-221 is

manufactured in accordance with

ISO 9001 / 14001 quality assurancesystem and the Responsible CareProgram.

Product Benefits

- 1-C formulation- Elastic- Low odor- Resistant to aging and weathering

exposure- Non-corrosive- Can be overpainted- Can be sanded

- Bonds well to a wide variety ofsubstrates

- NSF-approved for incidental foodcontact and potable water (blackand white only).

Areas of Appl ication

Sikaflex-221 bonds well to a wi

variety of substrates and is suitabfor making permanent elastic seaof high adhesive strength. Suitabsubstrate materials are woometals, metal primers and pa

coatings (2-c systems), ceram


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Sika Corporation

Industry Division

30800 Stephenson Highway

Madison Heights, MI 48071

USA

Tel. 248 577 0020

Fax 248 577 0810

Further information available at:

www.sikaindustry.com

materials and plastics. Before usingon transparent and pigmentedmaterials that are prone to stresscracking, contact the TechnicalService Department of Sika Industryat 888-832-7452.

This product is suitable forexperienced professional users only.Tests with actual substrates andconditions have to be performed toensure adhesion and materialcompatibility.

Cure MechanismSikaflex

-221 cures by reaction with

atmospheric moisture. At lowtemperatures the water content ofthe air is generally lower and thecuring reaction proceeds somewhatslower (see diagram).

Time (days)

00 2 4 6

23C / 50% r.h

10

8

12

10C / 50% r.h4

Thicknesso

fcure(mm)

Diagram 1: Curing speed Sikaflex

-221

Chemical ResistanceSikaflex

-221 is resistant to fresh

water, seawater, limewater, sewageeffluent, diluted acids and causticsolutions; temporarily resistant tofuels, mineral oils, vegetable and

animal fats and oils; not resistant toorganic acids, alcohol, concentratedmineral acids and caustic solutionsor solvents.The above information is offered forgeneral guidance only. Advice onspecific applications will be given onrequest. Contact the TechnicalService Department of Sika Industryat 888-832-7452.

Method of ApplicationSurface preparationSurfaces must be clean, dry andfree from all traces of grease, oil and

dust. The substrates must be

prepared in accordance with theinstructions given in the current SikaPrimer Chart. Advice on specificapplications is available from theTechnical Service Department ofSika Industry.

ApplicationCartridges: Pierce cartridgemembrane.

Unipacs: Place unipac in theapplication gun and snip off theclosure clip.Cut off the tip of the nozzle to suitjoint width and apply the sealant intothe joint with a suitable handoperated or compressed air gun,taking care to avoid air entrapment.Once opened, packs should be usedup within a relatively short time. Donot apply at temperatures below41F (5C) or above 104F (40C).The optimum temperature forsubstrate and sealant is between59F (15C) and 77F (25C). For

advice on selecting and setting up asuitable pump system, as well as onthe techniques of pump operatedapplication, please contact theSystem Engineering Department ofSika Industry at 888-832-7452.

Tooling and finishingTooling and finishing must becarried out within the tack free timeof the sealant. We recommend theuse of Sika

-Slick Cutout Lubricant

and Tooling Agent. Other finishingagents or lubricants must be testedfor suitability/compatibility.

RemovalUncured Sikaflex

-221 can be

removed from tools and equipmentwith Sika

Remover-208 or another

suitable solvent. Strictly followsolvent manufacturer's warnings andinstruction for use. Once cured, thematerial can only be removedmechanically. Hands and exposedskin should be washed immediatelyusing a suitable industrial handcleaner and water. Do not usesolvents on skin!

Overpainting

Sikaflex-221 can be overpaint

when tack-free. The paint and paprocess must be tested compatibility by carrying opreliminary trials. Sikaflex

-2

should not be exposed to bakitemperatures until it has attained fcure. The hardness and fthickness of the paint may impair telasticity of the sealant and lead cracking of the paint film with time

Limitations

Avoid application below 41F (5and above 104F (40C). Do napply on frozen or wet surfaces through standing water. Do napply over silicones or in tpresence of curing siliconeContact with alcohol or alcohcontaining solvents will prevecure.

WARNING:IRRITANT, SENSITIZER. ContaiPolyisocyanate Prepolym(Mixture), Xylene (CAS 1330-20-Causes eye irritation. May causkin/respiratory irritation. Mcause skin and/or respiratosensitization after prolongcontact. May be harmful swallowed. Reports have associatrepeated and prolonged exposuresome of the chemicals in thproduct with permanent brain, livkidney and nervous systedamage. Headaches and dizzine

may result. Deliberate misuse inhalation of vapors may harmful or fatal. Strictly follow usage, handling and storainstructions.

Certified to the NSF/ANStandard 61 for potable water.

HMIS

Health *

Flammability

Reactivity 0

Personal Protection C


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Sika Corporation

Industry Division



USA

Tel. 248 577 0020

Fax 248 577 0810



First Aid MeasuresEyes Hold eyelids apart and flushthoroughly with water for 15minutes. Skin Removecontaminated clothing. Wash skinthoroughly for 15 minutes with soapand water. Inhalation Remove tofresh air. Ingestion Do not inducevomiting. Dilute with water. Contactphysician. In all cases contact aphysician immediately ifsymptoms persist.Further Information

Copies of the following publicationsare available on our websitewww.sikaindustry.com:-Material Safety Data Sheets-Product Data Sheet-Sika Primer Chart-General guidelines for bonding andsealing with Sika products

In case of emergency call:

Chemtrec: 800-424-9300International: 703-527-3887

Health and Safety InformationFor further information and adviceregarding transportation, handling,storage and disposal of chemicalproducts, users should refer to theactual Material Safety Data Sheetscontaining physical, ecological,toxicological and other safety relateddata. It is highly recommended toread the actual Material Safety DataSheet before using the product.

-KEEP OUT OF REACH OFCHILDREN

-

NOT FOR INTERNALCONSUMPTION-FOR INDUSTRIAL USE ONLY-KEEP CONTAINER TIGHTLY

CLOSED

Packaging Information

Cartridge 300 ml

Unipac300 ml

600 ml

Pail 4.5 gal

Drum 50 gal

Value BasisAll technical data stated on thisProduct Data Sheet are based onthe results of laboratory tests only.Actual measured data in the fieldmay vary due to site specificconditions which are not known toSika and beyond our control.

Handling and StorageAvoid direct contact. Wear personalprotective equipment (chemicalresistant goggles/gloves/clothing) toprevent direct contact with skin andeyes. Use only in well ventilatedareas. Open doors and windowsduring use. Use a properly fittedNIOSH respirator if ventilation ispoor. Wash thoroughly with soapand water after use. Removecontaminated clothing and launderbefore reuse.Product Storage: Although astorage temperature range of 40-95F is acceptable, maintaining astorage temperature of


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Sika Corporation

Industry Division



USA

Tel. 248 577 0020

Fax 248 577 0810



available at www.sikacorp.com or bycalling 201-933-8800.

Prior to each use of any Sikaproduct, the user must always readand follow the warnings andinstructions on the products mostcurrent Product Data Sheet, productlabel and Material Safety DataSheet which are available atwww.sikaindustry.com. Nothingcontained in any Sika materialsrelieves the user of the obligation toread and follow the warnings andinstruction for each Sika product asset forth in the current Product DataSheet, product label and MaterialSafety Data Sheet prior to productuse.

sikaflex221 us

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