303 Black Streak Remover 30243 targets the dark runoff marks that collect on suitable RV and boat exteriors. Mariners Warehouse SKU 99440 supplies one 32 oz spray bottle for focused cleaning where roof runoff and deposited dirt have left visible streaks.
Manufacturer material examples include fiberglass, vinyl, metal and painted surfaces. Match the actual finish and its care instructions before treatment. A localized streak remover serves a different role from a full exterior shampoo or a dedicated protective coating, so identify the mark before choosing the next care step.
Shake the bottle and apply to a dry permitted surface. Spray the streak, allow 2–3 minutes, gently agitate and remove the cleaner with a wet towel, microfiber cloth or sponge. Repeat where needed under the current label. Keep clean wiping tools available and assess the result before treating any remaining discoloration as deposited dirt.
Clear Product Details
Review the 16 oz gel format, specifications and application directions.
Surface Guidance
Check fiberglass, gelcoat and finish suitability before use.
Product Support
Ask about your surface and stain type before ordering.
Shipping & Returns
Review shipping information and return conditions before purchase.
DECK & MULTI-SURFACE CLEANING
Plan Your 303 Black Streak Remover Use
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Confirm Material Fit
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Shake and Use a Dry Surface
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Spray the Target Area
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Allow 2–3 Minutes
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Wipe with a Wet Tool
Targeted Streak Cleaner or Full RV Wash?
Choose the Right Care Product
Frequently Asked Questions
What does SKU 99440 include?
One 32 oz spray bottle. The manufacturer/pack code is 30243.
What causes the streaks it targets?
The manufacturer describes deposited dirt and rubber runoff from RV roofs as common causes.
Do I start on a wet surface?
No. The current manufacturer directions specify a dry surface.
How long does it sit before removal?
Current manufacturer directions specify 2–3 minutes, followed by gentle agitation and wet wiping.
What can I wipe it off with?
Use a suitable wet towel, microfiber cloth or sponge under the label directions.
Can I use it on a boat?
Yes, the manufacturer includes boats among its applications. Confirm the actual material and finish.
Does it replace RV wash or UV protection?
It serves targeted streak removal. Select a separate approved wash or protective product when that care stage is needed.
How can I confirm the right selection?
Contact Mariners Warehouse with SKU 99440, code 30243, your actual material or equipment and the intended task.
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