Features:1. Ideal for replacing defective or broken touch screen LCD screens.2. This is a true LOCA (Liquid Optical Clear Glue) Glue.3. Kept in a syringe. The syringe will protect it from the hardening of conventional lights.4. UV-curing UV glue must be cured with UV light, which will harden in about 30 seconds, but the recommended curing time is about 3 minutes.5. Can also be used under sunlight, but it will takes more time.6. Replace the faulty part and start using the unit again.Specifications:Model: LOCA Optical Glue TP2500FCapacity: 50 mlMaterial: Acrylicandlt PhysicalPropertiesTestmethodAppearanceVisualInspectionClearViscosityBrookfieldRVT,25,20rpm,spindle 32300-2800mPa.sDensityUncuredAdhesiveat250.93g or cm3CureConditionUVA:250to420nm,2500mJ or cm2HardnessASTMD2240Etype18-30UVCuringDepthCured 100mW or cm2for30sandgt 3.0mmVolumeShrinkageDensityMeterandlt 2 percent UVFixtureTimeCured 100mW or cm2andlt 30sTensileStrengthGlass-GlassCrossBonding0.30N or mm2DielectricConstant1MHz2.3-3.0RefractiveindexLiquidAbbeat251.5RefractiveindexSolidAbbeat251.51 percent TransmittanceAt550nm99.8 percent (andgt 99 percent ) percent HazeASTMD10030.13 percent (andlt 0.3 percent )YellowIndex-bxASTMD1925 or C20.2(andlt 1.0)Package List:1 x GlueNote:Take iPhone 4 as an example:1. Clean the LCD screen area2. Apply about 1.5g of UV glue to the middle of the LCD screen.3. Make sure the area of the LCD screen is clean, except for the area where you use UV glue and prepare the front glass for glue.4. Glue the front glass correctly.5. After the UV glue is applied, the entire screen is exposed to ultraviolet light, and the UV glue cures for 3-5 minutes.If you are not a technician, please do not buy.Do not use fluorescent lamps when soldering. Fluorescence emits ultraviolet light, which is sufficient to slowly cure the glue. For longer working hours, work under normal light bulb or LED lighting. You can even put the lights far away if needed. Also, if you don't have UV light, don't forget that sunny days can also cure this glue. Just 3 minutes. Cloudy cloudy days may take longer.