RV Cleaners: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

They disagree: Claude chooses Thetford and GPT chooses Camco

In Automotive, Claude and GPT choose the same brand in 60 of 112 categories.

Claude Opus 5.5 · October 27, 2026

Thetford Premium RV Black Streak Remover (line)

Removes the black runoff streaks that are the most common RV exterior cleaning problem, and it is formulated to be safe on fiberglass, painted and aluminum siding.

Not for: Anyone who mainly needs to clean a rubber roof, or to restore chalky, oxidized gelcoat. Those jobs need a roof-specific cleaner or a compound.

GPT 6.1 Sol · November 11, 2026

Camco RV Wash & Wax (line)

Combines routine exterior cleaning with a wax finish, making it a practical all-purpose choice for RV maintenance.

Not for: Heavy oxidation, stubborn black streaks, or specialized rubber-roof cleaning.

Claude also lists Camco among the brands that matter.

Which one fits you

EPDM rubber roof cleaning

Dicor Rubber Roof Cleaner (line)

It is made by a major RV roof membrane brand specifically for EPDM, so it cleans without the petroleum solvents that damage rubber.

Not for: Owners of TPO, fiberglass or aluminum roofs.

UV protection for vinyl, rubber seals and plastics

303 Aerospace Protectant (line)

It is a water-based UV protectant that leaves no greasy film on window gaskets, slide seals, tires and plastic trim.

Not for: Anyone looking for a cleaner. It protects surfaces that are already clean and does not remove dirt.

Check before you buy

Surface compatibility. Check that the label explicitly lists your surface: EPDM, TPO, fiberglass gelcoat, painted aluminum or decals. Petroleum distillates and citrus solvents swell EPDM and can void roof membrane warranties.
Solvent content. On rubber roofs, seals and decals, avoid petroleum-based or harsh solvent cleaners. Solvents degrade rubber and lift or fade graphics.
Rinse behavior. Choose products that rinse off cleanly without leaving residue that runs down the sidewalls. Residue from the roof creates new streaks on the siding below.
Single job focus. Use a dedicated product for each job: streaks, roof, or protectant. All-in-one products tend to be weak at every task.

Where to find Thetford Premium RV Black Streak Remover

Walmart
eTrailer
RV Parts Express

Shops seen in search results on November 5, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Brands that matter

Thetford: Broad RV-specific line of cleaners and streak removers.
Dicor: Roof membrane maker; its cleaners are matched to its EPDM and TPO roofs.
303: The standard choice for UV protectant on rubber and vinyl.
Camco: Wide range of RV chemicals and widely available.
Star brite: Marine-derived cleaners that work well on gelcoat.

What to avoid

Petroleum- or citrus-solvent cleaners on EPDM roofs
Abrasive powders or scrub pads on gelcoat and decals
Household degreasers that strip wax and dry out seals

Questions

Can I use the same cleaner on the roof and the sides?

Only if the label covers both surfaces. Rubber roofs need a solvent-free cleaner, and sidewall streak removers are not always roof-safe.

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