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Walmart [walmart.com] has Suds Lab XP 64-Ounce High Foaming Exterior Car Wash Shampoo on sale for $9.97. Shipping is free w/ Walmart+ (free trial available [walmart.com]) or on orders $35+.

Features:[LIST][*]64-ounce concentrated formula[*]pH-balanced to safely clean without removing wax or ceramic coatings[*]High-foaming action removes dirt, grime, and road contamination[*]Safe on paint, clear coat, wax, plastics, rubber, and seals