YK-620 Series | High Temperature Putty Characteristics Super high temparature resistance,cold resistance and resistance to changing tempe-rature It is specially applied on substrates with thermal and cold requirements such as e-ngine hood and the mechanical surface that generate high temperature and applicati-on in spraying of powder coating Application   Steel panel,iron panel,glass fiber and any painted metallic surface Application mixing ratio Putty :Hardener(by weight)=100:1.5-3 Note:Pot Life 5-7min (according to the temperature and ratio of Hardener) Application reference 1. Completely remove the rust,oil dirt,water and so on from the surfaces,keep the coated surfaces clean before scraping. 2. The Putty and Hardener should be mixed completely to achieve the uniformity of colour. 3. The mixture of Putty and Hardener should be used up before gelling. 4. Scrape the mixture of Putty and Hardener into the spot defects which will be fi-lled and scrape to evenness immediately. 5. In case of scraping of thick coat.it is preferable to apply in thin coats for s-everal times till reaching the obiective thickness. 6. Sanding affer mixture is hardened(50-90min20℃) . 7. Sanding paper Main performance Indexes  Item  performance Index 1 Density (g/cm3) 1.7±0.05 2 Adhesion(Pull and method)Mpa ≥6Mpa 3 Fiexibility (mm) 50--70 4 Impact strength (kg·Cm) ≥30（ kg.cm ） No peel-off at ≥20(kg.Cm) 5 Thermal resistance(200±2) ℃1h No crack , No bulge 6 Temperature Variation Resistance(3 cycles) No crack , No peel-of         Note:temperature varistion resistance: 120±1℃×1h->25±1℃×0.5h-> -50±1℃×1h   as one cycle Notices 1. The mixed Putty must bi used up within the available period before gelling.or it will gel. 2. When there is air bubble while application,fully scrape to evenness with scraper to ensure good adhesion. 3. Immediate baking at 200℃ should not be conducted until curing for 8-20 hours. 4. Containers which are opened must be carefully resealed,the Putty mixed with har-deners should not be returned to the original container. 5. Store in a cool place where the temperature is below 25℃,The shelf life is one-year.