Xfactor&reg; LOCA UV Glue Gun Dispenser for 30ml and 50ml Tubes (50ml Xfactor Low Viscosity UV LOCA) 50ml LOCA (Liquid Optically Clear Adhesive) Glue repairs approximately 25 phones! Commercial size tube is preferred by Smart phone Repair Shops across the nation! DESIGNED FOR SMART PHONE SCREEN REPAIR: Xfactor Liquid Optical Clear Adhesive (LOCA) is formulated especially for bonding the outer glass to the digitizer in a smart phone or tablet display assembly. Compatible with all touchscreen devices and other phones and tablets needing LOCA to attach glass and/or digitizer to LCD PROFESSIONAL GRADE, ULTRA LOW VISCOSITY adhesive dries clear! - 2000mPa*s viscosity (general LOCAs average 5000mPa*s). Thanks to LOW VISCOSITY technology, bubbles/voids can be easily removed, smaller amounts of glue can be used, easier to clean, flows well, & cures with NO YELLOWING EFFECT, GUARANTEED! EXCELLENT GAP FILLING & HIGH LIGHT TRANSMITTANCE: Xfactor LOCA fills fine scratches that may occur upon removing the old adhesive. Xfactor eliminates mirror effect, rainbow effect, poor contrast, and low brightness, while improving touch sensitivity for that OEM look and feel you so desire! BLACK LIGHTPROOF TUBE ensures adhesive will remain in a liquid state, rather than harden like transparent tubes. Note: LOCA is sensitive to UV. Exposure to sunlight will cure adhesive, which is why all our tubes are black