Silicon Stain
SILICONE
Type:
Silicone caulking used for grouting and anchoring stone.

Problem:
This can be a series problem when caulking is used to help hold anchors in place on stone wall panels.The silicone will start to bleed through the stone in the area where the anchors are.It may take several months before the silicone becomes visible.

Solution:
The only known technique that will remove silicone staining is the following:
Prepare a poultice with Methylene chloride and a powder poultice.(May require a dozen applications.)
If the silicone has not completely cured, the staining may return again.
 
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