About Us
30+ Years of Great Service
Gero Diagnostics was established in 1992 by a father and son team, Georg and Robert Rettermayer.
We specialise in environmentally friendly cleaning methods that do not damage surfaces and are free of chemicals.
In 2009, a sister company, Gero Sandblasting, was established. We provide sandblasting services at our premises and on-site to companies in Gauteng.
We often hear that people really battle with unreliable service in our industry. It sounds simple, but “we pitch up and get the job done.”
We take pride in getting the job done right, using the best sandblasting method for your project. We are trusted by companies with their equipment, artists with statues and monument restoration.
Health and Safety is of utmost importance
Our company is fully compliant with Health and Safety regulations.
- A Safety Officer does monthly training sessions
- Our staff have yearly medicals
- We are certified for working at heights
You can request our Letter of Good Standing here.
Level 4 BEE Sandblasting Company
We are a Level 4 B-BBEEE contributor.
Download BEE certificate here.
TLB Hire Division
Our Gero TLB division has been operating since 2003. We provide operators and TLB machines for rental in the greater Johannesburg and Pretoria area.
Projects We’re Proud Of
See sandblasting projects we’ve done in Gauteng.