Removing Sap from Concrete?

Lisa

July 6, 20100 found this helpful

Have you tried oxi-clean it is non toxic and works wonders. Spray it on let sit till almost dry use a deck brush and rinse with water.

whmcintyre

March 20, 20190 found this helpful

Thanks for the suggestion the problem is the same as what we are experiencing but it is sap from a fir tree

 

I have new natural stone on my front steps. Today there were several brown spots on one of the stones. I have 2 emerald cedar trees directly in front of the landing where this happened.