Liquid Rubber EPDM and TPO Primer – High-Performance Basecoat for RV, Camper and Trailer Roof Protection, 1 Quart

Used in conjunction with the tape and rubber coating to fix the roof of my camper. Once it is on do not try to walk on it as it is extremely sticky.

Worked perfectly. Sealed totally

Follow the directions and give it time to set up and it works great!! Easy to apply with cheap paint brush - I didn’t use a roller so can’t say but should be easy enough. I’m using it for a pond liner so long term use I don’t know yet be but adhesion seems good and recommend following the cure time

06/06/26' Brushed on first coat with a 4 inch wide fine bristle paint brush on a 70° day in complete Shade. My EPDM roof is only 8' wide X 18' long with several roof top obstructions. The Liquid Rubber Primer spreads easily. I allowed 48 hours dry time as the temperature fluctuated. Used a roller to apply a second THICKER Coat. Primer remains sticky even after 72 hours. I am Extremely Satisfied with the ease of this L.R. brand primer. BE SURE to use a LONG stir stick to scrape bottom of tub when stirring the primer.

Very good product easy to put on works great in camper stopped all leaks

After prepping my roof (scraping, rotory 3m disc, and lacquer thinner) removing the old sealant off the trailer roof, I applied the primer with a brush to the perimeter seam. This is a 6×12 trailer, I applied a 6" wide swath, then it tacked up slightly, so I applied a second coat to cover any deficiencies I may have left. Still have a half quart left. Material is very thin and easy to apply. The following day I laid down the seam tape, immediately followed by the top coat. Second coat of top added also a day or two later.

Highly recommend using before applying sealant. Fast delivery. Excellent transaction.

Went on easy, but it is already peeling up. Very disappointed. I do not know if it is from this or the lap sealant of the same brand but I have a horrendous leak now that has caused tremendous damage.

Very sticky stuff - can not walk on it - follow instructions

Works well

I bought this for my camper renovation. With a few help from online tutorials, install went without hiccup. I have also bought the brand’s paint and application was manageable. Will review it’s durability after some time. Great product!

This primer is very strong and sticky. It does its job, but even when it dries you won't be able to walk on it on the roof of your RV or you'll get stuck with your shoes. Even after 3 days, it is still sticky. So, if you want to paint your roof with liquid rubber afterwards, you have to wet your shoe soles to get a step at all. It is best to walk on the freshly laid liquid gum and follow from the beginning of the roof to the end. Otherwise, you tear the membrane off the camper's roof, trying to tear your shoes off the camper's roof.

I did a test patch on my RV rubber roof. It worked great. I used the Liquid Rubber cleaner followed by the primer and then 2 coats of RV roof sealant.