The authoritative public forum
  for Metal Finishing since 1989
-----

How to remove purple PVC primer stains from cement?

My husband was cleaning pipes with the purple primer in preparation to glue them, some got on the cement patio. How can I remove it?

Reda Redding
homemaker - Scott Depot, West Virginia, USA
2005

---

2005

Try using a mild solution of muriatic acid ⇦this on eBay or Amazon [affil links] and water. If it doesn't remove the stain increase the acid to water ratio.

Use only if this is bare concrete. The acid will remove any coating or sealer also.

Brian Webster
- Fort Lauderdale, Florida

---

2005

That seems like an intelligent answer by Brian .... but the next time you go cementing, try using some CLEAR primer. The HCl will 'remove' the cement partially, it is useless, I think, to use any other method.

The use of coloured primer was so that inspectors could see if the pipe had been preprimed ...experts, such as some thermoplastic fabricators, never, ever use the coloured primer and stick only to clear primers.

See the library ... and Having a Leak on the Job article.

Freeman Newton [deceased]
(It is our sad duty to advise that Freeman passed away
April 21, 2012. R.I.P. old friend).

Ok so how do I remove the purple primer from siding on the house?

Kevin M. Day
- Louisville, Kentucky, USA
May 22, 2008