QED Chemicals

Makers Industrial Ltd and QED jointly commissioned an independent test to verify whether it is possible for a corrosion inhibitor to migrate through concrete.

Samples of concrete where Margel VPI 580 had been used where submitted for testing to Geomaterials

The Conclusion Summarised by Dr French BSc,PhD,FGS of Geomaterials was;

"It is clear that Margel does travel through a concrete pore structure, or more precisely, each element of it does."

"Each active ingredient contains a known corrosion inhibitor with an industry track record of inhibiting corrosion, we can verify that this readily travels through dense structural concrete"


Report on testing from samples taken from Wynford House, London. 4310.PDF

----- further test results from Geomaterials -----

Subsequent to the results obtained from the tests in 4310, a full scale repair project had been completed on Wynford House, London, using Margel as the corrosion inhibitor. Wynford House was suffering from cast in chloride contamination at a level of approx 2% per mass of cement. Thirty one further tests have been carried out to show the presence of Margel on this structure, all of which showed a positive result. These are covered under reports 4571 and 4620.

Report Number 4474 - Completed in July 1998

Report Number 4571

Report Number 4620