I’ve been using the 303 Marine Aerospace Protectant (10 oz spray) on my kayak and a few other outdoor plastics, and it works exactly as expected.

It’s very easy to apply—just spray on and wipe down—and it spreads evenly without leaving a greasy or sticky residue. The finish comes out clean and natural-looking rather than overly shiny, which I prefer.

The main benefit is UV protection. It noticeably helps prevent fading and drying on exposed plastic and vinyl surfaces, which is exactly what you want for anything that sits in the sun a lot, like a kayak.

A little goes a long way, so even the 10 oz bottle lasts quite a while. For regular outdoor gear maintenance, it’s simple, effective, and worth having around if you want to keep plastics and trim in better condition over time.

If you don't know about Formula 303 SEALANT/Shine you should. Conditions plastic & rubber much better than any other available product. With use when new, inside & out & regular every 3 months re-apolication, 3x the miles on your tires is normal. I've seen 156k miles tires treated with 303 & they look but& have the look, grip & tread as newly mounted tires but look far better due to 303 conditioning. This is NOT like typical but"rubber or plastic shine" type auto products. It SEALS & treats the raw open rubber on belts, hoses & tires making them far stronger & harder lessening the wear immensely. I use it on anything plastic or rubber on my vehicles & reapply every 3 months. Unlike other products (Armor all etc.) It does NOT stain glass or plastic & won't make sun baked surfaces crack (dashboards etc.) if only used 1x. I reapply it inside & outside my vehicles to deepen the color of rubber & plastic. May be used on dyed or painted plastic bumpers or boat painted fiberglass without damaging the paint or dye. Great for hard to reach seals & any rubber that sees wear on vehicles. I soak my belts & hoses & tie rod or ball joints for instance overnight or for 20 minutes pre i installation & it reduces wear. Great in CV boots as well & prevents tearing due to age without adding a shiny,greasy feeling to the item. Used it 1x on a dashboard now with 170k+ miles on it. No cracks now & looks better than new. Hasn't stained any fabric, paint or metal unlike other rubber treatment products. Save serious $ & use on your tires & get 109k+ miles from them even if you use this on only the outside (let it soak in overnight on 1st application imho & for 6-8 hours every 3-4 months after just by spraying them down with 303. Also works great as a leather restirer & sealant). The Gallon is a "must have" for me & easily the cheapest buy. 303 is definitely much better than any other treatment & truly aerospace & aviation designed to protect $100k aviation cockpit dashboards from the sun. Nothing else comes close. I've been using it for over 25 years without a single disappoinment & find new uses all the time as it is a sealant/protectant + it + standard household spray paint may be used to recondition worn dyed color leather seats easily & cheaply with no paint ever coming off on your clothes after using 303 sealant. It's simply the best leather, rubber,fiberglass & plastic conditioner & sealant made.

I use this on a lot of stuff from fiberglass, plastic to auto paint! Great for a quick cleanup and shine. It does repel dust.

This is a great product BUT the design of the 1 Gallon container does not facilitate pouring without wasting some of the product. Going from the 1 gallon container into a funnel on the spray bottle is a shameful mess. I ended up using a clean add blue nozzle to make it easier to distribute. I would love suggestions as to how to refill directly. I guess I need to transfer to a third container prior to refilling the spray bottle.

“Pontoon Seat Savior – This Stuff Works!”

I’ve tried a lot of products over the years to keep my boat looking sharp, and nothing has impressed me like the 303 Marine UV Protectant. My pontoon seats were filthy — black scuffs from the cover, dull vinyl, and spots I thought were permanent. One spray and wipe later, I was shocked. The seats looked brand new, like they just came off the showroom floor.

✨ What I love most:

Restores instantly — scuffs, grime, and dullness wiped away with zero effort.

UV protection — living proof that it keeps vinyl from cracking, fading, or drying out under the sun.

Non-greasy finish — no slick residue, just a clean, like-new surface.

Multi-use — I’ve since used it on plastic trim and other surfaces. Same magic results.

💡 Pro Tip: Spray, let it sit for a few seconds, then wipe with a clean microfiber cloth. The before-and-after difference is jaw-dropping (see my photos!).

If you’ve got a boat, jet ski, or any outdoor gear exposed to sun and weather, this product is a must. For me, it turned a “maybe we need new seats” moment into “wow, our pontoon looks like new again.”

Highly recommend.

I had a mobile fleet washing and detail business for over 20 years. I had accounts with the California Highway Patrol for over 10 years. I’ve tried so many products usually 3M is my go too. But I have to say this is probably one of the best protectants I’ve ever used. I haven’t tried it out in the blistering heat that we have in the summer. But as far as aplying this product and removing is so easy. And the look it leaves is amazing. Now I’ve only used it on vinyl but it’s incredible! You definitely have to try it. Another thing I was amazed with is the small amount I used and the area it covered.

Marine Aerospace Protectant Spray delivers long‑lasting UV and weather protection for your boat, RV, or outdoor gear. Its advanced formulation helps protect vinyl, rubber, plastic, and gelcoat from fading, cracking, and harsh sun exposure — ideal for marine environments where salt and sunlight can take a toll.

It sprays on easily and dries without leaving a greasy residue, giving surfaces a clean, refreshed look while enhancing durability. Perfect for dashboards, seats, trim, and exterior surfaces exposed to sun and salt air.

Pros:

• Strong UV and weather protection

• Non‑greasy finish

• Easy to apply

Cons:

• Best results with regular re‑application

• Scent may be noticeable initially

Bottom Line: A reliable protectant spray that keeps marine and outdoor surfaces looking newer longer — a smart choice for boat owners and outdoor enthusiasts.

This is the best stuff for plastic. This will save your dash from years under the sun and windshield. I wish I had found this sooner. You can tell after putting it on that you made the right decision to buy it! There may be cheaper stuff, but you need twice as much, twice as often.

If you have a bike with plastic fairing and you don't want the plastic to look faded and old, use this protectant. Its just an amazing way to make the plastic shine and to keep it dirt resistant. Every time I wash my bike, the first thing I do it after it dries is to apply this. Very happy with the protectant.

Gave my new dinghy a coating and very happy with the results. I will also use this on the seals of the slide outs on the trailer. Will buy again

Just like what they have described

In my case it didnt work at all. Sprayed it on the travel bag and no results whatsoever. I recommend finding another solution if you have an extreme color fades like in my case

303 is the finest UV protectant out there. It truly works to protect a multitude of surfaces such as vinyl, plastic, rubber, and leather from the harmful effects of the sun. As it is non-silicone based, it is never sticky or overly glossy, drying to a semi-matte sheen. It is far superior to Armor All or Son-of-A-Gun - I stopped using these after I discovered 303.