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Removing stain ffom shingles

Posted by Jim on November 25th, 1999 08:28 PM
In reply to prevent red cedar shingles from blackening; invisible storms by Pat Baker on October 8th, 1999 04:48 PM [Go to top of thread]

Try a mix of Tri-sodium-Phosphate and chlorine bleach. Spray on and brush lightly with medium broom. Mix should be hot water to dissolve the TSP and then add bleach (Sodium hypoclorate 5.5%)
TSP to cut the surface tension and loosen dirt, bleach to lighten the color. Worked for me,

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