How does this compare to their "wash-in" version? I assume it would be more economical since it's not being diluted by a bunch of water?

Actually just the opposite... the Spray-On variety is simply a watered down version of the Wash-in, which means you are paying for a diluted product. I have had great results making my own Spray-in solution by using 1/3 Wash-in product and 2/3 water in my own spray bottle.

Can you spray it on a dry garment?

Spraying this on a dry (oops!) 100% polyester coat resulted in terrible spotting stains. Any ideas how to remove the stains? I've tried baking soda, vinegar, stain remover, etc. and the coat has been washed over three times. If anything, the spots look worse. I've ruined a brand new coat by forgetting to apply it to WET fabrics!

if you run out of the small spray bottle and wanted to refill, can the wash in work or should just buy a new bottle and spayer?

In a pinch, the wash in could work to refill the spray bottle but the sprayis a different formulation designed to work better as a spray.

Can this work on a polyester shower curtain ? If so, would it have to be applied often?

Used it on my London Fog raincoat (polyester). Not a petro-solvent vehicle; water soluble. So, no problem. Has a chemical smell for a few days as it dries and sets. Goes away in about 4 days. No discoloration.

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T.X.Direct Spray-On Waterproofing

Product ID: 264759552

Details

Brand
Nikwax
Item dimensions L x W x H
5.7 x 5.7 x
Item weight
454 g
Material
Plastic
Style
500 ml

💧Restores water-repellency

♻️Eco-friendly, PFC-free formula

🌬️Revives breathability

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NZ$271

Duties & taxes included

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Sold byAmazon Cook IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💦 Gear up for the elements—because staying dry never goes out of style!

SPRAY ON SIMPLICITY - Effortless spray application for quick, even coverage—no mess, no fuss, just reliable waterproofing.
STAY DRY STAY AHEAD - Instantly restores water-repellency on all waterproof gear, so you never miss a beat in wet weather.
TRUSTED BY TOP BRANDS - Compatible with GORE-TEX, Patagonia, North Face, Columbia, Arc'teryx—gear up like the pros.
ECO CONSCIOUS PROTECTION - Water-based, biodegradable, and free from PFAS and optical brighteners—protect your gear and the planet.
BREATHE EASY PERFORM BETTER - Revives breathability to keep your technical outerwear comfortable and fresh during intense outdoor activities.

Nikwax TX.Direct Spray-On Waterproofing is a 500ml water-based treatment that restores water-repellency and breathability to all waterproof outerwear and synthetic sleeping bags. Compatible with leading technical fabrics like GORE-TEX and top outdoor brands, it offers an easy spray-on application without harmful PFAS or added scents, making it an eco-friendly choice for maintaining peak performance in wet conditions.

Specifications

ASIN	B0019GLADA
Best Sellers Rank	#17,203 in Sporting Goods ( See Top 100 in Sporting Goods ) #12 in Camping Waterproofing & Cleaning Equipment
Brand Name	Nikwax
Color	No Color
Compatible Material	Fabric, GORE-TEX, Patagonia, North Face, Columbia, Outdoor Research, Cotopaxi, Arc'teryx
Customer Reviews	4.4 4.4 out of 5 stars (6,919)
Global Trade Identification Number	00703861000249
Item Dimensions	5.7 x 5.7 x 17.8 centimeters
Item Form	Liquid
Item Type Name	Apparel Aftercare
Item Weight	1 Pounds
Manufacturer	Nikwax
Material Type	Plastic
Model	572
Number of Items	1
Part Number	572
Style Name	500 ml
Surface Recommendation	Fabric
UPC	703861000249 703861001352 703861000232
Unit Count	500 Milliliters
Water Resistance Level	Waterproof

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