303 Products 30674 High Tech Fabric Guard with Water Repellant - 1 Gallon

My boat cover was only one year old and it leaked rain into my boat filling the hull. I have purchased other 303 products and they worked very well. I gave this a try in hopes that it would repel the rain from entering my boat while docked. I applied the 303 by putting it into a spray bottle. Let it dry for 12 hours and put the boat cover to use. Two rain storms hit in the 48 hours following and my hull was dry. Great product. I hope it lasts a couple or years before I have to respray the cover.

I annually remove the canvas, put it in the washer and hang to dry. Then it gets sprayed with 303 fabric until it is dripping from the bottom. Canvas is reinstalled after it is dry. The boat is on a lift in the SW Florida sun for 6 months a year. Over the summer the boat/canvas are in a garage and the only sun exposure is during use. This review is tagged to the 3rd gallon of this product that I have purchased.

I did research to compare against Starbright. I went with this in spite of higher cost. I like 303 products.

We have the Ikea Ektorp sectional with White slipcovers in the sunroom at our airbnb/vrbo vacation rental. We have 2 covers so things can be swapped/cleaned as needed but since IKEA no longer makes 100% cotton slipcovers & the new ones can’t be bleached I wanted to protect our old version for as long as possible.Its sunroom location is directly off the pool area which means its heavily used and requires CONSTANT stain treatment & washing. This is life and we’re happy people enjoy are enjoying their vacation but it does get exhausting pre-treating & removing stains every 4-7 days.A lot of the issues seemed to come from wet bathing suits, suntan oils, and drink spills so I figured waterproofing might prevent wet suit color transfer & allow guests time to clean up spills before they soak in.So far this has done an AMAZING job at prolonging the time between washings!!I haven't noticed any change to the fabrics color, feel, or durability after using this religiously. A few of the cushions did develop some yellow areas that bleach hasn’t taken out but I don't know if that's a result of using this for over a year or if it was caused by a guest.—TIPS / STEPS—These are steps I’ve found work best for our use.1. Transfer product into HEAVY DUTY spray bottle (such as those found at Home Depot) •Low-quality sprayers deteriorate after 1st use2. Launder Items 1-2 days prior to treatment: •Treat stains w/ shout •Use as LITTLE un-scented detergent possible •2nd Wash: Just Borax & Vinegar •2 Rinse Cycles •Dryer*The manufacturers online info is very specific about the product only working if there’s NO residual product leftover in fabric. Yes...it's exhausting, but its made a HUGE difference in how well this works compared to just applying after normal wash/dry.3. Lay down clean cotton drop-cloth in driveway & place clean items on top.4. Put on gloves & a respirator/mask if sensitive to fumes. Also make sure no animals or children are nearby while spraying. *See bottom for further info about why this is important*5. Spray 1st side thoroughly. •Paying special attention to the edges & piping since these areas collect dirt & color quickest.6. Allow items to dry in sun for remaineder of the afternoon7. After they’ve fully dried I place them in a sterile bag & put it in the garage overnight.8. The next morning I Repeat steps 3-6 for the opposite side. •It’s entirely possible to do both sides in a single day...but I’ve found the chemical off-gassing lingers FAR LESS TIME if each side is sprayed & allowed to sun-bake for at least 5 hours before treating the opposite side.**GLOVES, MASK & NO ANIMAL / CHILDREN**Yes, there’s a very strong chemical smell that lasts 8+ hours. This is due to the ‘odorless mineral spirits’ content which is used as a carrier to help the waterproofing to penetrate into the fabric fibers. However unlike the name implies, OMS is far from odorless.So, PLEASE BE SURE to use this: •Outdoors in a well ventilated area •Away from all Animals & Children •Plenty of daylight time to allow for the mineral spirits to evaporate/off-gas.➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖For the sunroom we also use a Dash & Albert indoor/outdoor rug on top of the large jute rug, this has been a lifesaver and worth its weight in gold when trying to keep a rental spotless! It allows spills to be easily cleaned or even bleached out when necessary. We’ve spot treated between guests & removed to fully bleach during spring cleaning...both options are quick and easy with any stains coming right up.*Since posting the original review above I’ve also started using this on the rentals drop-cloth cabana style curtains on the outdoor pergola.Although we don’t see a lot of rainfall here in San Diego....the overnight condensation and random rainstorms meant they would only last 4-5 months before mildew & mold could no longer be bleached out and they needed replaced.After putting 4 new ones up I sprayed front/back to see if it might slow mildew. It worked well initially but after about 2 months it seemed to accelerate the issue since the new curtains were heavily spotted with mildew while the old bleached ones weren’t.This may be due to my quick spray rather than following the guidelines I use for the slipcovers. The drop cloths are heavily bleached before making the curtains so this residue + treatment might have made a bad combo. I plan to try again while following the slipcover steps to see if it works better, will update my review if so.

Easy to use,does exactly what it says