When you’re using a waterproof spray, first start by laying out your fabric over a piece of cardboard. Lightly spray the surface of the fabric while holding the can about 6 inches away. Go over the entire piece of fabric without applying it too heavily. So, the fabric should not be completely saturated with spray. They actually kind of adhere to the individual fibers, like an old-fashioned telephone cord—they wrap around the fibers," says Heidi Allen, the vice president of marketing at Nikwax. "They have a little stretchiness to them." It’s important to follow the manufacturer’s instructions and reapply the spray as needed to ensure ongoing protection against water damage. Waterproof Coating for Wood:

Purpose and Requirements: Clarify your project’s purpose and requirements to guide your spray paint selection. Apply a coat of stain-sealant to the thoroughly cleaned and sanded wood surface with a brush, roller, and/or paint sprayer. Rust-prevention spray paint will prevent air-borne moisture particles from reaching the metal surface and causing rust. Unfortunately, it won’t prevent corrosion from occurring on the inside of a metal piece. 4. Enamel Spray Paint Usually, you’ll want to put on a second coat after you let the fabric dry for about four hours. After that dries, then you’ll be good to go and ready to test it out. With WaxThe perfect waterproofing product makes your gear feel like new—waterproof and breathable again, with no negative changes to the material. That’s precisely what Grangers Performance Repel Plus, a non-aerosol spray from the British brand, did for an older pair of rain pants that were wetting out. In fact, the waterproofing on these pants was better after applying this spray than it was before. The rest of this section will look specifically at Nikwax TX Direct vs Revivex Instant Waterproofing Spray. Both products are “durable water repellent” (DWR) sprays. Both are non-silicone and water-based. Both can be used on outerwear, tents, sleeping bags and footwear. Application: Spray vs Aerosol

Good review of the different sealers – i am a technical rep for wood finishes and just wanted to add that there is one major difference between water based and oil based wood finishes – water based finishes dry to a porous coating(moisture vapor will still move in and out of the wood, slowly from humidity) – while oil based finishes seal the water vapor out(humidity will only move through uncoated areas of the wood). This is due to the chemical process of drying water vs oil/alkyd solvents…and causes confusion about what “sealed” means, they both seal out liquid water, but only oil seals the vapor alsoEven with its lower price, this is one of the most effective waterproofing sprays we tested, and no amount of water applied to the boots used for testing was enough to penetrate its shield, yet the boots felt as breathable as before. It didn’t take much product for a thorough double coating—recommended about four hours apart—making this an even more cost-effective product. Odor is caused by chemical reactions, and these can be initiated by UV light. The protection from UV light offered by this product makes sure no unwanted chemical reactions take place. These could lead to bad odors or decolorization of the bag’s fabric.