303 Products Marine Fabric Guard – Water Repellent & Stain Shielding Fabric Spray, Safe for All Outdoor Upholstery, Simple & Easy to Use, Protectant Spray for Boats, 1 Gallon

This product (High Tech Fabric Guard 30674) works great - 100% of the water now beads up and my cloth top looks better than new !!!My Situation:The very first time my brand new, light beige cloth convertible top got wet I realized it came from the car dealer and/or factory either untreated and/or seriously under treated because water just soaked right into the cloth as evidenced by the darker cloth color when wet.End Result:After applying two coats of this product 100% of the water beaded-up and rolled right off the top. Nothing soaked in at all - zero wet spots on the cloth top. (Since the top is a light beige color any wet spots would show up slightly darker in color.) Any water that didn't roll off the top was absorbed using The Absorber 51149 sponge-cloth available on Amazon or at WalMart.Process:1) I gently cleaned my cloth convertible top using 303 Fabric Top Cleaner (303-30550). To do this I first rinsed the top with fresh water, then sprayed the cleaner on & gently scrubbed using a very soft brush (I used Star Brite Soft Yellow Wash Brush 040013 available on Amazon). A stiffer brush or too vigorous scrubbing could damage the fabric, scuffing the threads and creating a fuzzy look to the fabric. I cleaned the top in slightly overlapping areas about 18” x 18”.2) I rinsed the top and allowed it to dry thoroughly.3) Using a 2" paint brush and small container of 303 High Tech Fabric Guard 30674, I applied the Fabric Guard brushing it on in a manner similar to painting. By overlapping slightly I made certain I applied the product to every square inch of the top.4) I allowed the top to dry several hours and applied a second coat of Fabric Guard.Notes:1) When applying the clear Fabric Guard liquid with a 2" paint brush it will start to have a slightly white/foamy appearance - this will go away completely and the product will dry clear.2) After each application I noticed a VERY slight, very fine clear crystalline residue on my cloth top. You had to look very closely to see it - it had just a little bit of sparkle to it in the sunlight. This brushed off quickly and easily & probably would have blown off the first time I drove the car.3) Some reviewers seem to have issues relating to getting the product on the car itself saying it was hard to remove. I didn’t have this problem. The few times that I over-brushed or got small drops Fabric Guard on the car itself I simply gently wiped it with a soft paper towel and it didn't damage anything or leave any residual coating. It seemed to wipe off 100% with a soft paper towel.4) READ THE LABEL !!! The first paragraph covers some surfaces that you CANNOT use this product on without causing damage. These include rubber, vinyl, clear vinyl, plastics, etc. Since the product's Material Safety Data Sheet lists the contents as Petroleum Distillates, just a wild guess but prolonged contact with this product may have a solvent effect on materials such as vinyl or plastic.5) I wouldn't purchase 303 Fabric Cleaner again – I think a bucket of hot water with a scant squirt of Dawn dish detergent would do just as good of a job. Of course, you will need to completely rinse the top and allow it dry thoroughly before applying 303 Fabric Guard.6) I have no idea how long my cloth top will remain water repellant after applying Fabric Guard. I plan on doing this process every 6 to 8 months or sooner if I notice any water being absorbed by the cloth top.

I applied this to my hybrid camper's pop-out canvas beds. The camper is 8yrs old and we had never resealed the beds. We got downpoured on twice during our trip after resealing (like 3 hrs straight each time of hard rain). No leaks, no condensation, Nada.

303 products are my go-to for all fabric cleaning and protection. This 303 was easy to use and when following the instructions I ended up with a stain free, high quality, beautiful restored 23 year old canvas cover. Needless to say the color did not run or stain from this product and I have full confidence the UV Protection will help keep this cover in good shape for many more years. Couldn't be happier as a new cover of this quality would cost over $4K. This cover came out looking so good my neighbors thought it was brand new.

Update: The water proofing lasted about 90 days and was so-so at best. Yeah, the water would bead up... But if the bead sat on the fabric it just soaked right in after a minute or two. Once the product wore off completely it was noticeable- the top started to drink water like crazy. It's been 12 months now and the top absorbs so much water that it smells musty the following day after a rain or wash. I will say that I am simply blown away by the rich black color of the top in my review picture because it certainly isn't that black after it wears off! Even though I recently used a dye product to try and restore some color! So I'll definitely be ordering again today. And this time I will brush it on instead of using the spray.(Rating reduced from 5 stars to 4)Exceptional product! Restored the ten year old top on my Pontiac Solstice back to looking like new. Will update with product video after it dries.FYI, I sprayed wildly with the product with absolutely no regard for over spray on paint or glass. I had zero issues. I had a microfiber towel handy, and I made sure I let it sit for no more than fifteen seconds before wiping it off, and most importantly, I moved to a clean portion of the towel without residue between wipes. I got this stuff EVERYWHERE. And the back window was literally saturated with it after spraying the trim. Cleaned right up, no hazing or anything.If you DO miss some spots during wipe up, meguiars ultimate compound will remove it in seconds with no hard scrubbing or damage to paint or glass.It took roughly 5/6 of the bottle to do a deep saturation on my two seater. But the top had clearly lost its water repelling effects years ago - so your milage may vary.

Works great. Does not leave any discoloration

Great product

This product is absolutely the best to keep my jackets and full length waxed cotton duster ( which I wear in freezing rain) waterproofed. Will coat several articles fully with one bottle, and the sprayer works great . It usually can go several uses before needing respraying, every other product only lasted one use before needing to be fully sprayed again.It is strong smelling when applied, so use proper ventilation. After drying fully there is very minimal scent left.Highly recommended, I’m on my second purchase!