Technical Data Sheet Terostat MS 939 18 August -2009 Tensile strength (acc. to ISO 37), MPa: approx. 3.0 PRODUCT DESCRIPTION Terostat MS 939 provides the following product Elongation at break (acc. to ISO 37, approx. 250 speed 200 mm/min),%: characteristics: Stress at 100 % elongation approx. 1.6 (acc. to ISO 37), MPa: Technology Silane modified polymer Volume change (acc. to DIN52451),%: <2 Product Type Adhesive/Sealant Paint compatibility: in principle Components One-component compatible Cure Humidity UV resistance: no signif.changes Application Assembly UV source: Osram Vitalux 300W, Appearance White ,Off-white,Grey ,Black dry UV Consistency Pasty ,Thixotropic Distance to the specimen, cm: 25 Odor Characteristic Test period, weeks: 6 QUV resistance: no signif.changes Terostat MS 939 is a gun-grade, one-component sealant QUV source: QUV based on silane modified polymers, which cures by reaction weatherometer acc. with moisture to an elastic product . The skin formation and to DIN53384-A curing times are dependent on humidity and temperature, and Test period, weeks: 6 the curing time also depends on joint depth. By increasing the Reference IEC61215/61646 clause 10.13: temperature and moisture these times can be reduced low Damp heat test durability **: given temperature as well as low moisture retard the process. Test period, hours: 1,000 Terostat MS 939is particularly sag-resistant leading to a high Application temperature, C: 5 to 40 position tack after matching of the parts to be bonded. In service temperature range, C: -40to +100 Terostat MS 939 is free of solvents, isocyanates, silicones Short exposure (up to 1 h),C: 120 and PVC. It demonstrates good adhesion to many substrates * ISO 291 standard climate: 23C, 50% relative and is compatible with suitable paint systems . The sealant air humidity also demonstrates good UV resistance and can therefore be **Damp heat conditions: 85C, 85% relative used for interior and exterior applications . Terostat MS 939 air humidity demonstrates the strength necessary for elastic bonding. This property of the product also remains at the temperatures in repair ovens (max. 100C). Terostat MS 939 shows no shrinkage, and therefore dimpling and tension stress are not Certificates and Approvals observed under these conditions . Terostat MS 939 allows - approved to UL (Underwriters Laboratories)Polymeric accelerated curing as two-component material .See separate Adhesive Systems, Electrical Equipment -Componen File: data sheets Terostat MS Power & Speed Technology or QOQW2.MH27655 Terostat MS 2c-Technology . DIRECTIONS OF USE Application Areas: Preliminary statement: Terostat MS 939is used for the following applications: elastic Prior to application itis necessary to read the Material Safety bonding of metals and plastics, e.g. side panelling and Data Sheet for information about precautionary measures bonding of the roof skin in the vehicle and caravan and safety recommendations. Also, for chemical products manufacture. elastic, interior and/or exterior seam and joint exempt from compulsory labeling,the relevant precautions sealing in the following areas. vehicle body, caravan, railway should always be observed. carriage, container and general metal construction the electrical, plastics, air- conditioning and ventilation industries TECHNICAL DATA Density, g/cm, white, grey: approx. 1.5 Density, g/cm, off-white: approx. 1.45 Density, g/cm, black: approx. 1.45 Sag resistance: no sagging (DIN profile 15 mm) Skin formation time, min*: approx. 10 Cure rate, mm/24 hrs: approx. 3 Shore- A-hardness (ISO 868, Durometer A): approx. 55 Henkel AG & Co.KGaA 40191 Dsseldorf. Germany Phone: +49-211-797-0 www.henkel.comPre-Treatment: The substrates must be clean, dry, oil-and grease free. Depending on the surface itcan be necessary to roughen the surface or to use a primer/adhesion promoter to provide best adhesion . When manufacturing plastics, external release agents are often used these agents must be accurately removed prior to starting bonding or sealing. Due to the different compositions of paints, especially powder paints and the large number of different substrates, application trials before use are necessary. For cleaning, Cleaner + Diluent A, FL or Terostat 450 from the Henkel portfolio are suitable . Especially for plastics and coatings - powder coatings - Terostat 450 has to be tested. When bonding and sealing PMMA, e.g.Plexiglas, and polycarbonate, e.g.Makrolon or Lexan, under tension, stress corrosion cracking may occur. Application trials before use are necessary. There is no adhesion to polyethylene, polypropylene and PTFE. Substrates not mentioned above should be subject to trials. Application: Application from 310 ml cartridges is made with the Teroson Hand or Air Pressure Pistols, and from plastic wallets (310 and 570 ml) with the corresponding FK-Hand or FK-Air Pressure Pistols. In the case of compressed air application a pressure of 2 to 5 bar is required .Low material temperatures of the sealant willlead to an increase of viscosity, resulting in a lower extrusion rate. This can be avoided by bringing the sealant up to room temperature prior to application . If substrates are too cold, temperature may fallbelow dew point causing condensation. This can be avoided by bringing the substrates up to room temperature in time .Terostat MS 939 can also be applied from hobbocks or drums with high pressure pumps with follower plates. See separate application directions of Terostat MS products in hobbocks and drums . Cleaning: For cleaning application equipment contaminated with uncured Terostat MS 939we recommend the use of cleaners + diluents A or FL. STORAGE Frost- Sensitive No Recommended Storage Temperature, C 10 to 25 Shelf-life(in unopened original packaging), 12 months ADDITIONAL INFORMATION Disclaimer: The Information provided herein, especially recommendations for the usage and the application of our products, is based upon our knowledge and experience. Due to different materials used as well as to varying working conditions beyond our control we strictly recommend to carry out intensive trials to test the suitability of our products with regard to the required processes and applications. We do not accept any liabilitywith regard to the above information or with regard to any verbal recommendation, except for cases where we are liableof gross negligence or false intention. This datasheet replaces allformer versions. Reference 0.0 Henkel AG & Co.KGaA 40191 Dsseldorf. Germany Phone: +49-211-797-0 www.henkel.com