QUESTIONCleaning Granite Stains - I have a granite counter top and it appears that it retains heat marks from a cup. I thought that granite is the most heat resistant stone, why are there heat marks from a cup? Is there a way to clean or seal the stone so that there will be no heat mark?
ANSWERANSWER - I have never heard of granite showing heat marks. The natural granite itself should not be affected by heat.
My guess is that there is some coating on the granite such as a sealer that is reacting to the heat. You may want to remove any surface coatings and then seal with a penetrating type of sealer.
You should contact a company that specializes in stone cleaning and sealing products, such as those listed in Cleaners and Sealers in the Expert Answers in the Resources column. Good Luck!