Mould often appears in grout lines due to the material’s porous structure, combined with excess moisture and inadequate airflow. Black, brown, and yellow stains can make bathrooms look unclean, even after scrubbing. Natural remedies like white vinegar and baking soda often fall short. To find the top solution, three popular products underwent testing on affected tile grout: Astonish Mould & Mildew Blaster, HG Mould Spray, and Mould Magic gel.
Products Under Review
Astonish Mould & Mildew Blaster costs around £1.99 at stores like Wilko and The Range, or £2.99 at Lakeland. HG Mould Spray retails for £4.29 at Savers or £6 at B&Q. Mould Magic gel, sold for £12.99 for two tubes via specialist retailers, promises complete mould elimination in one use.
Testing Process
Tests targeted varied stains—black, brown, and yellow—near the shower area. Gloves protected hands, and surfaces stayed dry before application to avoid dilution. Each product treated separate sections.
Mould Magic gel applies thickly, adheres without dripping, and carries minimal odor. It requires 2-3 hours to activate.
HG Mould Spray foams up for good cling but drips slightly. Its bleach-like scent is strong, though ventilation helps. Wait time: 30 minutes.
Astonish spray feels watery and runs quickly but needs only 10 minutes for tough spots. Its scent is noticeable but milder than HG’s.
Impressive Results
Astonish surprised by erasing mould in one wipe after 10 minutes, leaving grout mostly clean despite minor discoloration. At its low price, it delivers quick results.
HG matched ease, with visible mould breakdown before wiping. A rinse cleared foam, revealing bright white grout—an unexpected perk.
Mould Magic fully removed stains but left gel residue on tiles, requiring thorough wiping. No strong smell lingered.
Clear Winner Emerges
All three effectively tackle grout mould. HG Mould Spray stands out for its 30-minute action, superior whitening, and accessibility. Astonish suits fast fixes on a budget, while Mould Magic excels on silicone seals but demands more time and effort to apply and remove. Prices reflect recent checks.
