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Vacuum Cup Lesson 101

Occasionally we receive questions regarding the differences between suction cups and vacuum cups. The best way to secure mounts with vacuum cups to the glass.

Cup-shaped devices called suction cups, usually made of rubber, silicone, or other flexible compounds, that use negative fluid pressure of air or water to adhere to nonporous surfaces and in the process create a partial vacuum.[1] They are inexpensive and available in a variety of configurations. Suction cups require pressure to adhere to any given surface and the larger the cup the more pressure required for a secure mount in most cases.

Suction cups work well for attaching small lightweight parts like inspection mirrors, compact UV lights or other small parts that do not have a lot of back pressure against them.

Vacuum cups are also typically made of rubber, silicone, or other flexible compounds, but unlike suction cups, feature a lever, button, or pump that pulls the center of the cup up away from the glass, thereby creating a vacuum that holds the outer edges of the cup securely to the mounting surface. A vacuum cup is generally flatter, allowing more surface area to contact the glass, thus providing a more secure attachment with very little downward pressure regardless of the cup size. Attached properly, vacuum cups are also typically far more rigid than suction cups.

Vacuum cups vs suction cups

Vacuum cups are preferable over suction cups for attaching glass repair holding devices (bridges) to a broken windscreen for several reasons:

  1. Less pressure is required to attach a vacuum cup securely to the glass. Significantly minimizing the chance of causing a crack to run.
  2. The rigid mount holds the injector firmly in place against the glass. Greatly reducing end seal leaks, and again, requires less pressure against the glass to minimize the chance of a crack out.
  3. A properly mounted vacuum cup is far less likely to “come loose” and fall off the glass. Minimizing the potential damage to equipment and to the customer’s vehicle. Bridges have back pressure against the injector and the leveling screw(s) so maximum holding power is necessary.
  4. A small vacuum cup has far more holding strength than a suction cup several times as large. It is therefore easier to carry, store and use.

Delta Kits uses high-quality vacuum cups on all mounts and bridges.  Ensuring a stronger and more reliable adherence to the glass. Many Delta Kits UV lights feature factory mounted suction cups for cost-effectiveness and convenience. Versatile vacuum cup mounts are available and adaptable to all Delta Kits UV lights.

To get the most out of all vacuum cups and suction cups…. Continue Reading

1 review for Suction Cup

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    Kathryn J.

    Absolutely, this product helps me

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Training and Tradeshows

This windshield repair training is a hands-on, intensive, one day course designed to take your repair quality to the next level. Whether you are just starting out or are a seasoned pro, this class is right for you!

Our team of experienced technicians are dedicated to offering the highest standard of training in the windshield repair industry. During the Delta Kits Training and Certification course, technicians are trained to follow ROLAGS (Repair of Laminated Auto Glass Standards), the industries best practices. Delta Kits Training and Certification covers all technical aspects of windshield repair and will take you from never having completed a repair, to being among the best technicians in the industry. The marketing and insurance billing discussion is designed to help you become more successful in your windshield repair business.


Who are our experts:

Heinrich Hermanus from Jerxheim in Germany has been working with Delta Kits since 2003. As a certified Delta Kits trainer, he has taught numerous people how to perform perfect rock chip repairs in the years since 2006. As a Delta Kits distributor in Europe, he speaks German and English and provides valuable services to many customers and users with his clearly formulated tips and instructions, whether by phone, mail correspondence or on-site at the customer.

Graham Watson, is one of the original Novus Technicians in the UK since 1988 and since then has been running a very successful windscreen repair service in the UK. In 2008 Graham was named Windshield Repair Person of the year at the Mobile Tech Expo, an award he is very proud of as it is voted for by his peers in the trade. For the past 10 years, Watson has been active training technicians for the repair industry and specializes in advanced training for techs with previous experience, during this time he has been lucky enough to work with people from many different countries. His passion for helping others carry out the best quality repairs possible shows in the time he spends offering advice on different trade forums as Screenman.