Introducing the Gtechniq W4 Citrus Foam Wash, a state-of-the-art cleaning product with a degreasing foam agent that provides an unbeatable clean for your car. Works with Any Gtechniq Coating When you use W4 Citrus Foam, you can rest assured that it will not negatively impact your Gtechniq coating or sealant that you have already applied, as Citrus Foam has been specifically formulated with a 100% biodegradable, pH neutral formula that works in harmony with Gtechniqs range of coatings.
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