How does this product vary from the 303 Marine formula? I don't understand what the difference is.

I really do not know. I have a boat on a river. I use both products , seem the same to me. The only thing I am thinking , maybe the marine formula has more UV protection since the boat is usually in open sun light.They are both excellent !

Could this product be applied to the outside of a vertical propane smoker with surface temps that can reach up to around 500 degrees?

The simple answer is yes. The material safety data sheet for this product under section 5.1 (flashpoint & method) & section 5.2 (auto ignition temperature) both state not applicable. Under multiple section 2 categories it's stated that there is no inhalation risk. This would support a yes answer. Under section 10.2 (decomposition products) it states heat & co2 will age the product faster. Longevity of the protestant may be short but it appears that it, in theory, is safe. I could not find a temp smoke point. If you try this I may do a test spot somewhere on your smoker before you attempt a full coat.

Can it be used on a black and white cotton umbrella used in Arizonia direct sun to keep from fading ?

It goes on a little like armor All except it dries and leaves a matte finish and is not greasy at all. I am not sure if it would do the same for cotton as it would soak in but I am sure it would be better than nothing at all. Its holding up well on my car exterior so far.

Received the 10 oz. bottle, and it was half full. I picked it up and turned it upside down and the liquid came running out. How can I get $back?

Amazon has a product issue section in their listings as well as in your product order documentation.

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Description

🛡️ Elevate your gear’s glow with aerospace-grade protection—because your surfaces deserve the best.

TRUSTED LONGEVITY - Reapply every 3-5 weeks for continuous protection backed by 40+ years of aerospace innovation.
ULTIMATE UV DEFENSE - Protects vinyl, rubber, plastic & more from fading and cracking with aerospace-grade UV blockers.
DUST STAIN REPELLENT - Keeps your gear looking fresh by repelling dust, dirt, salt water, and stubborn stains effortlessly.
MATTE FINISH ZERO GREASE - Dries to a smooth, non-oily matte finish that elevates your surfaces without the shine overload.
MULTI SURFACE VERSATILITY - Engineered for everything from car interiors to outdoor furniture—one spray, endless protection.

303 Aerospace Protectant is a premium, water-based spray originally designed for aviation that protects and restores vinyl, rubber, plastic, leather, and more. It prevents UV damage, fading, cracking, and repels dust and stains while drying to a sleek matte finish without greasy residue. Ideal for vehicles, boats, outdoor furniture, and spa covers, it offers long-lasting protection with recommended reapplication every 3-5 weeks. Made in the USA with over 40 years of trusted performance.

Specifications

Material	Plastic
Brand	303 Products
Style	Compact
Item Weight	16 Ounces
Item dimensions L x W x H	47 x 96 x 277 Millimeters
Water Resistance Level	Water Repellent
Item Form	Spray
EU Spare Part Availability Duration	2 Years
UPC	082043303089 785422700607
Net Quantity	473.0 millilitre
Global Trade Identification Number	00082043303089
Number of Items	1
Colour	clear
Surface Recommendation	Roof
Manufacturer	Gold Eagle
Model	303 (30308) UV Protectant Spray for Vinyl, Plastic, Rubber, Fiberglass, Leather & More – Dust and Dirt Repellant -
Product Dimensions	4.72 x 9.63 x 27.69 cm; 453.59 g
Item model number	30308
Manufacturer Part Number	30308CSR
OEM Part Number	30308
Volume	473 Millilitres
Stain Resistant?	Yes
Assembly Required	No
Manufacturer	Gold Eagle
Country of Origin	USA
Item Weight	453 g

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