Soft99 Glass Compound Z (100ml)

No. Glass Compound Z is formulated specifically for glass surfaces. It should not be used on painted panels, rubber seals, plastic trim or mirror housings. Keep it on the glass only.

Glass Compound Z is generally safe on factory-applied tinting (inside the glass) since the tint film sits on the inner surface and you'll be working the outer surface. Avoid applying it to aftermarket window tint film applied to the inside of the glass, as the abrasive may damage or cloud the film.

Both methods work well. For light haze and water spots, hand application with a damp microfibre applicator or glass polishing pad is usually sufficient. For heavier water spot etching or more stubborn mineral deposits, a dual-action polisher on a glass-specific or light foam pad speeds up the process considerably.

Work the compound in overlapping passes until the product starts to break down and go slightly translucent. At that point, buff off with a clean, dry microfibre cloth and inspect under a light. If spots or haze remain, repeat the process on those areas rather than continuing to work the whole panel.

Yes, and it's strongly recommended. Glass Compound Z leaves the glass surface clean and lightly abraded, which is an ideal base for a glass sealant or ceramic glass coating to bond to. Skipping this step means the glass will pick up contamination and water spots again more quickly.

Glass Compound Z handles light surface scratches, swirl marks on glass and mild water spot etching. Deep gouges or cracks caused by stone chips are beyond what any compound can address - those require professional glass repair or replacement. If you can catch a scratch with a fingernail, it is unlikely to polish out completely.

The compound itself removes contamination and restores clarity - it does not add any protective layer. Durability of the clarity depends entirely on what you apply afterwards. Following up with a quality glass sealant typically gives several months of protection, while a ceramic glass coating extends that further and makes the glass much easier to keep clean.

A little goes a long way. A pea-sized amount on your pad is enough for one working section of around 30 x 30 cm. For a full windscreen in average condition, expect to use a modest amount per session. Heavily contaminated glass may require a second pass, but avoid over-applying as excess compound is harder to buff off cleanly.