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EPDM Testimonials - EPDM Rubber
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Liquid Rubber

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Commercial Roofing Applications With Liquid Rubber



Galvanized and Metal roofing

Liquid Rubber is an excellent one coat system for metal roofs for a number of reasons. First as the product cures you will notice something not evident in any other roof coating; a chemical bond whereby the coatings and the substrate become one. This allows for the liquid epdm to outperform any other coating in the most harshest of environments. In fact many of the factors of Liquid EPDM rubber will not even be challenged for example:

  • Can perform at temperatures exceeding 275 F and 35 below zero
  • Tolerates high percentage concentrations of acids
  • Has a 200% elongation factor
  • Tensile strength is up to 3000 psi

The approximate square footage is 42 square feet per gallon and comes in gallons and 5 gallon pails. The cured coating will dry to a 20 mil (about the thickness of 6 pieces of paper together). For those surfaces with rust another benefit is there is no need to apply any primer. Liquid EPDM Rubber can be applied directly to corrosion/rust and immediately will stop the oxidization. Depending on the size of your roof this one coat application is as low as $1.15 per square foot and will provide four times the durability and longevity than your elastomeric systems and acrylics. There is no need for multiple coats or adding needless weight to your roof. Historically EPDM has been an extremely durable material used in many products and for the past 26 years now has been manufactured in liquid form with all the same properties and more. It has a built in mildewcide and will not chalk like the rolled or sheet version does after 12 years.

Application over any 3rd party coating's

  • On original finishes:
    Assuming the current coatings is tightly adhered you can top coat with the Liquid EPDM with the use of the ProFlex primer first. A note on severely corroded metal in these instances a rust inhibiting primer must be used. For mild to medium rust however no primer is needed just the Liquid Rubber.
  • For application over alkyd paints:
    If the alkyd paints have been aged for at least three years you are fine with coating directly over with the Liquid Rubber. You should inspect that the original finish has good adhesion otherwise you will need to remove the paint prior to the application of the Liquid EPDM. Ideally the entire roof should be power washed. A note is if the paint is only removed in certain areas (meaning spotty) you must let it weather for one more year before application or apply the ProFlex primer over the areas still with paint
  • Asphalt-tar and ModBit based coatings:
    For these types of roofs you would need the ProFlex Primer before applying the Liquid Rubber. Same with any coal tar or Alkyd roof and roof coated with another product such as an acrylic or elastomeric The ProFlex primer would need to be used in these instances.
  • Elastomeric-Acrylic applied roofs:
    The Liquid EPDM Rubber will not bond to these products unless the ProFlex primer is first used. The formulations of the elastomeric's particularly the earlier acrylics were susceptible to corrosion occurring under the film.

Unfortunately a visual inspection would not find any of this corrosion on the surface and small areas need to be removed to identify where in the roof this is occurring and the severity of it. If you are able to do a visual on the underside it will reveal the damage in full.

Coatings over Epoxy's and Urethanes

Epoxy coatings that are more than four days old must be sanded (use 60 grit) or brush blasted in order to create a surface profile prior to recoating. If this is not done the second coat will have poor intercoat adhesion to the first.

Urethane Coatings

Urethane coatings range from soft and very flexible to hard and brittle. Hard Urethane coatings should be sanded with a hand held belt sander (use 60 grit) or brush blasted to create a surface profile prior to recoating. Softer Urethane coatings are difficult to sand but can be primed with Proflex to improve intercoat adhesion. For best results topcoat the following day when the surface of the primer is still slightly tacky. This occurs normally within 24 hours. If the primer is left to dry a reapplication of the primer will be necessary.

Asphalt based coating.

Liquid Roof coatings/Liquid Rubber cannot be directly used over any tar, asphalt or third party roof coatings without first priming the surface with the ProFlex primer. Applying without the primer will cause adhesion issues and over time the liquid EPDM rubber will pull up from the surface. Also note that not applying the primer to these surfaces will risk warranty coverage.

Click Here for Built up Roof Project with Photos.

Wood applications- Liquid epdm may be applied to wood/plywood but first needs to be primed with the ProFlex primer. Please read the directions regarding the primer


Rubber will penetrate into fissures at joints between old and new concrete. Product will also penetrate into surface pores unless concrete is trowel finished or pores are first sealed with a primer. Rubber will effectively waterproof tiles and rain gutters made of concrete or adobe type materials.

Flashing and repairs.

Flashing and seam work and repairs can be managed by either the fabric of the butyl rubber found on our order form. For the poly fabric you first coat a linear area with the rubber then roll out the fabric and impregnate the rubber into the fibers of the fabric with a paint brush. Wait 24 hours until the Liquid Rubber has set up before you coat over the entire area. If you are using the butyl rubber; the two sided tape you adhere one side to the seam pull off the backing on the exposed side and at that point you are ready to apply the Liquid EPDM.

Liquid EPDM used in industrial and commercial applications

Steel framing/Siding and Commercial Type Buildings.
For over 25 years the liquid EPDM rubber has been used on siding and steel; both walls and metal paint roofing since it is an excellent anti corrosive material. This coatings essentially will stop the oxodization process immediately once it is applied. For this reason it has become a very effective one coat system for our customers. In addition unlike other coatings over rust no primer/rust inhibitor is required.

Ocean-Marine application and Fabricated steel.
For those of us living around the shore and coastline we know how salt environment can literally attack not just our cars but equipment cranes, storage tanks and any storage structure. The rate of corrosion is excellerated exponentially due to the salt water. Did you know that Liquid EPDM is not effected by saltwater and in fact it will perform year round in a saltwater setting. Again one coat and no primer needed. Once the coatings is applied any corrosion is stopped since the elements can no longer penetrate the substrate. Over the years the product has been used to coat the tops of shipping containers that are put on large ocean ships traveling around the world. It has been applied on ships as well as pipes and wiring that was placed in saltwater.

Uses in storage containment.
Elevated or on ground steel storage tank can be effectively protected with a rubber coating. In fact the below chart represents various chemical storage capabilities of the Liquid EPDM

Volatile environments (acid and corrosive).
In industrial application where acids are used or produced; Liquid EPDM also has been successful. In particular our clients with production operations such as poultry and hogs that generate a high concentrations of manure can corrode other coatings. This is not the case with Liquid EPDM Rubber. Regarding any metal, steel material the Liquid EPDM protects them from any rapid deterioration due to exposure to harsh environments.

EPDM Formulas and Processes

Remember, the above are guidelines used to start with. Any applications should be tested thoroughly before putting anything in service. EPDM manufacturers will have some differing formulas and processes and will have some performance differences. So verify all the above information in the field.

Marine Uses.
(Product -9911 Ship Shape) Liquid Rubber has been used extensively on vessels from large ships to small houseboats. The application is possible due to its UV and ozone resistance, saltwater tolerance, water resistance and overall flexibility.

Metal pipes and concrete pipes and spill containments.
concrete pipe protectionThe liquid EPDM has proven effective to protect metal piping from corrosion particularly our clients around the ocean in saltwater areas. The material withstands the constant exposure to the sun and had double the percent of volume solids vs the neoprene products on the market and outperforms elastomerics four times longer.

Corrosive type of substrates/or conditions.
There are many various corrosive byproducts with manufacturing, farming and livestock. We have had many customers over the years express real concern over manure in hog and poultry farms. Seems all the coating they have tried failed and in addition further corroded the areas meant to be protected. The Liquid Rubber was the only product that stopped the corrosion from getting worse but also provided for a cleaner facility. We have also had various customers who needed a strong barrier against various acid compounds and again Liquid Rubber outperformed the other products.

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