HydraMaster GRUNGESLAYER is an oxygen-activated powder prespray and booster for neglected tile and concrete with heavy grime, grease, oil, and soil buildup.

Mixing Instructions: Normal soil: 2 oz per gallon warm or hot water. Extreme soil: 3–4 oz per gallon. Inline sprayer: add 12 oz, fill with water, and use a 4:1 setting. Allow 3–5 minutes dwell time; do not use on natural stone. RTU pH: 12.0.

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