I have a large storage building roof to coat. Can I use a garden sprayer?

As a Ablebody Seaman (Unlimited, Any Waters) and US NAVY VET. I've probably busted more rust than 99.9% of anyone hear. While working on the TW Nelson (Mobile oil's Survey Vessel) we helped develop this stuff. Also aboard Supertankers for several oil Company's we got to try several different Brands of rust converter/reformer.. We brushed it. rolled it. sprayed it ( w/ air gun pick-up) and they all worked better than all previous methods.. and there were a bunch!!! In my opinion Corroseal was the Best of all!! I still buy it in quart & gallon sizes (when required as it goes a long way) DO NOT LET ANY OF THESE FREEZE!!! WATER BASED & WILL TURN INTO A ROCK. Talk about wasted $$$? Don't waste time & money on Rattle Cans as caps k-rap-out way before product does! U want to spray a large area? use air-sprayer w/ large orifice, more thin coats better than 1 thick. let dry. Just Bust off any Scale & Leave the rust. wash down, let dry then get after it! Just give up on acid & paste & all that k-rap. (I took more accidental showers in Ospho than I care to remember, before the new stuff) Wan-kers Away. Old Salty

how long before rust comes back if not painted right away?

You don't necessarily need to paint over it. The rust doesn't comeback if you use Corroseal as directed. It seals the metal.

how long before rust comes back if not painted right away?

Well, I bought it to touch up my deck chairs. The weather got cold and I have not had a chance to repaint them. I will do so in the spring. So that application is uncertain at present. However, since I had so much... My dishwasher racks had exposed metal where the rubber coating had broken down. I applied this stuff to those exposed areas, probably 2-3 months ago. I have not repainted or otherwise coated those areas. In the meantime, I have used the dishwasher multiple times (with that strong detergent!), and none of the areas I applied this stuff to has 1) lost its black color which was the result of the application, nor 2) begun to rust again. So, the coating seems very durable, even in the face of the adverse conditions in the dishwasher (water, heat, chemicals). YMMV

If i brush down to bare metal with no rust remaining, would i be better off with a different primer? (other than cost that is. i already bought it.)

Corroseal needs the rust to bond to. If you're at bare metal an epoxy primer would be best. Make sure you use a solvent to clean the surface to remove any dirt or oils that may have come from your hands. I've had great success with Corroseal on light to heavy rust.

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Description

🛠️ Transform rust into resilience—prime your metal for the future!

MULTI USE FOR PROS - Ideal for marine, automotive, household, and industrial metal restoration.
ECO FRIENDLY SAFE - Non-flammable, non-corrosive water-based formula cleans up with soap and water.
DURABLE SATIN FINISH - Protects metal surfaces with a smooth, professional satin look.
VERSATILE APPLICATION - Brush, roll, or spray with easy coverage of 200-250 sq ft per gallon.
ALL IN ONE RUST SOLUTION - Paint, prime, and convert rust simultaneously—save time and effort.

The 82320 Water-Based Rust Converter Metal Primer is a 1-quart, water-based, non-flammable rust converter that primes and protects metal surfaces in one easy step. Offering a satin finish and coverage of up to 250 sq ft per gallon, it’s perfect for marine, automotive, household, and industrial use, ensuring long-lasting rust protection with eco-friendly cleanup.

Specifications

Brand	Corroseal
Finish Type	Satin
Size	32 Fl Oz (Pack of 1)
Item Volume	1 Quarts
Special Feature	Rust Conversion
Unit Count	32.0 Fluid Ounces
Paint Type	Watercolor
Specific Uses For Product	Interior/Exterior
Surface Recommendation	Metal
Item Form	Liquid
Included Components	(1) Qt Rust Converter
Age Range (Description)	Adult
Is Waterproof	False
Model Name	Corroseal Rust Converter
Package Information	Bottle
Color Code	#000000
Coverage	200
UPC	704399515038
Global Trade Identification Number	00704399515038
Manufacturer	Rodda Paint Company
Part Number	82320
Item Weight	2.6 pounds
Product Dimensions	9.8 x 3.6 x 3.6 inches
Country of Origin	USA
Item model number	82320
Is Discontinued By Manufacturer	No
Style	Converter
Finish	Satin
Pattern	Converter
Item Package Quantity	1
Special Features	Rust Conversion
Batteries Included?	No
Batteries Required?	No

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