Not Easy to CrackThe windshield crack repair liquid for glass repair will not "chalk", "yellowing" or "crack" - even in the harshest climates and environments. Good EffectIt only takes 20-30 minutes after using the Windscreen Repair Kit, the repair effect can be restored to 90%-95% of the glass, and the effect is lasting. Easy to CarryThe Windscreen Repair Kit is small in size and easy to carry, so if your car glass encounters small damage, it can let you take it out at any time and repair it yourself, making your travel safer. Scope of ApplicationThe windshield crack repair liquid is suitable for the star, half-crescent, cracks up to 12"/30cm and spherical damage up to 1" in diameter. Vacuum FunctionAdvanced resin formulation and designed with enhanced sealant dispensing tip, which can generate powerful pressure to repair cracks. The vacuum function quickly removes air from cracks for optimal repair.