Thetford RV Black Streak & Bug Remover — 64 oz Gel Cleaner, Biodegradable & Safe on Gelcoat

Thetford Premium RV Black Streak & Bug Remover is a powerful, biodegradable gel cleaner formulated to lift black streaks, sun-baked bugs, and other stubborn soils from RVs, boats, cars, and more.

If your vehicle exterior shows dark streaks from roof vents, awning rails, or accumulated insect residue after a long trip, this 64 oz spray is made to tackle those spots without harsh solvents. The thick formula clings to vertical surfaces, penetrating grime while remaining safe for common exterior materials like gelcoat, fiberglass, painted aluminum, and most decals when used as directed. It is non-flammable, 100% biodegradable, and designed for spray-and-wipe convenience, though a quick rinse after use is recommended for best results.

How does this remover get rid of black streaks and baked-on bugs?

Thetford's formula combines alkaline detergents and cleaning agents that soften and break bond points between grime and the substrate. Because it’s a gel-like liquid, it stays on vertical surfaces long enough to dissolve residues without immediately running off.

• Gel consistency clings to surfaces for deeper penetration.
• Alkaline detergents lift oils and protein-based insect remains.
• Spray-and-wipe application speeds spot cleaning on the road.

Is it safe for my RV’s exterior, decals, and window seals?

The product is formulated to be safe on typical RV materials, including gelcoat, fiberglass and painted aluminum, and it won’t harm most decals when used properly. However, the cleaner is aggressive by design, so the manufacturer recommends spot-testing on older, weathered, or sensitive finishes before full use to avoid unexpected fading or damage.

• Works on gelcoat, fiberglass, painted aluminum, and many decals.
• Avoid prolonged contact with rubber seals; test first on aged surfaces.
• Use in shade and rinse promptly to reduce exposure time on delicate areas.

How do I apply it for the best and safest results?

For targeted cleaning, spray the area and allow the gel to sit briefly, then agitate gently with a soft cloth or sponge and rinse. Because it is an alkaline cleaner, you should test an inconspicuous area first and avoid using on hot, sunlit surfaces to prevent spotting or accelerated drying.

• Spot-test an inconspicuous area before widespread use.
• Apply in shade; spray, wait a short time, wipe with a clean cloth, then rinse.
• Do not allow to dry on surface; rinse immediately for best finish preservation.

What makes this formula environmentally preferable?

Thetford’s cleaner is non-flammable and fully biodegradable, which reduces environmental persistence compared with solvent-based alternatives. While safer for disposal, users should still follow local runoff regulations and avoid cleaning near storm drains.

• 100% biodegradable formulation minimizes long-term environmental impact.
• Non-flammable for safer storage and transport.
• Use responsibly — avoid concentrated runoff into water systems.

Who is this product for? Thetford Premium RV Black Streak & Bug Remover is ideal for RV owners, boaters, car enthusiasts, and fleet operators who need a dependable spot-cleaner for exterior streaks and insect residue. It’s especially useful for people who prefer a gel cleaner that clings to vertical surfaces, professionals maintaining multiple vehicles, and travelers who want a compact, effective solution for post-trip cleanup. If you have older or sensitive finishes, plan to spot-test before full application and follow the rinse guidance to protect seals and decals.

Ingredients

Propylene Glycol Butyl Ether, Propylene Glycol 2-Butyl Ether, water, Capryl Glucoside, Lauryl Glucoside, Tetrasodium Iminodisuccinate, Aspartic acid, disodium salt 2-Butenedioic acid E-, disodium salt, Sodium Borate, Methylchloroisothiazolinone, Methylisothiazolinone, Magnesium Chloride, Magnesium Nitrate