will this adhere to a roof that has been coated with fiber filled aluminized roofing?

EPDM Primer would not be needed for that type of roofing. Bonding to your existing material will depend on which product you want to apply and whether the existing coating is water-based or solvenated. Please reach out to us to discuss your project in greater detail. Liquid Rubber USA/CAN has great technical support, application info and instructional video's. Have a great day!

Very tacky, tip for recoat roof?

You can work in manageable sections or from the side off a ladder or scaffold. A popular method is to primer one half down the middle and work from the bare side. once you apply the first coat of RV coating and it dries, the surface will be tack free and you can walk on it to prime and coat the other half. Just leave a little primer exposed from the first half so you can marry to the other side.

How much would I need for a 40 foot goose neck camper? I am not sure the square footage?

For a 40 x 8 roof (320 sq ft) you will require about 1.5 gallons of primer and about 7 gallons of our Liquid Rubber RV Roof Coating. Be sure to measure seams and around vents and skylights and seal those areas with our Liquid Rubber Seam Tape, prior to primer and coating.

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🛡️ Seal the deal with the ultimate EPDM primer—because your roof deserves the best!

REUSABLE RELIABLE - Non-reactive to moisture, allowing you to reseal and reuse the primer without waste or compromise.
EFFORTLESS APPLICATION - Versatile formula applies smoothly with brush, roller, or spray systems—perfect for pros and DIYers alike.
UNRIVALED EPDM BONDING - Specifically engineered to maximize adhesion on notoriously tricky EPDM rubber surfaces.
COMPLETE ROOF SYSTEM READY - Pairs seamlessly with Liquid Rubber RV Smart Cleaner and Roof Coating for a bulletproof roofing solution.
WEATHERPROOF YOUR INVESTMENT - Creates a durable, waterproof base layer that protects RV roofs and rubber membranes from harsh elements.

Liquid Rubber EPDM Primer is a water-based rubber polymer primer designed to dramatically improve adhesion on EPDM rubber surfaces. Ideal for RV roofs and other rubber membranes, it ensures a weatherproof, long-lasting bond when used before applying Liquid Rubber coatings or seam tapes. Easy to apply with brush, roller, or spray, this primer is moisture-stable for resealing and reuse, making it a must-have for professional-grade roof maintenance and protection.

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Part number	89600
Item Weight	980 g
Package Dimensions	12.8 x 12.6 x 12.4 cm; 980 g
Item model number	89600
Size	1
Finish	Gloss
Material	rubber
Item Package Quantity	1
Coverage	Medium
Special Features	Waterproof
Specific uses	EPDM surfaces, Rubber roofs, Pond liners
Batteries Included?	No
Batteries Required?	No

Liquid Rubber EPDM Rubber and RV Roof Primer - Weatherseal Camper and Trailer Roofing Coating 1 Quart

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