EPDM Liquid Roof Applications: What You Should Know

If you search for RV roofing materials, you will likely come across a lot of information and resources for EPDM liquid roofing. This is one of the most popular options for RV owners who want a cost-effective, durable roofing solution that requires little maintenance and upkeep. Other roofing materials, such as fiberglass, are going to need much more routine care, and often cost more to install and maintain over time.

What is EPDM, though?

EPDM stands for Ethylene Propylene Diene Monomer, which is just a technical term for a synthetic rubber compound. This material is highly stable and flexible, and creates a binder during the curing process to create vulcanized EPDM rubber membranes and sheeting. For liquid roofing, the binding and curing process is not completed in the manufacturing process. The compound is left in a liquid state and combined with other ingredients to allow it to air-dry and cure to a flexible, watertight seal across the entire surface of the roof.

EPDM includes added oils to assist with curing and flexibility. This is part of what makes EPDM liquid roof applications so easy and effective. However, this material is also not resistant to oils or most solvents, which means that repair and maintenance products need to be compatible with EPDM or they will cause damage and premature deterioration and aging. The leading brands of RV maintenance, cleaning, and repair products all have EPDM-compatible products, however, so that shouldn’t be difficult to find if you know what you are looking for.

DIY EPDM Liquid Roof Applications

One of the biggest selling points, for many RV owners, is that liquid roofing can be done by just about anyone. Using a brush and roller or a squeegee, you can simply pour and spread the product across your RV roof and allow it to air dry to cure after you finish. RVs aren’t the only place you will find this roofing material, although they are among the most popular for liquid roofing. EPDM is also used for:

  • Mobile homes
  • Commercial buildings
  • Any building with a low slope or flat roof

Unlike sheet roofing and seamed products, liquid roofing creates a strong, seam-free membrane across the roof, which offers more protection and requires fewer repairs over time. This, combined with its affordability and versatile application, is what makes EPDM liquid roofing such a popular choice.

Frequently Asked Questions about EPDM Liquid Roof Applications

How long does EPDM take to cure?

Drying time depends on a number of factors, including humidity, temperature, and coating thickness. Typically, EPDM will be dry to the touch within a few hours of application. Full curing usually takes about 24 hours. Plus, the formula is designed to continue curing and bonding, so it will get stronger over time.

How much is EPDM liquid roofing?

Costs vary depending on the brand and type of liquid roofing that you choose, but a single gallon ranges from about $50 to $100. You can pick up 4-gallon or 5-gallon buckets for a few hundred bucks, in most cases. Keep in mind that a single gallon provides 40-45 square feet of coverage, so you may need less than you think.

Can I use leftover liquid roofing for maintenance and repairs?

If you have more materials than you need to replace or recoat your RV roof, you can save them for future needs. However, keep in mind that an EPDM liquid product is only going to be good for about a year. After that, the formula begins to separate and cannot be remixed. It’s best to buy only what you need and pick up repair kits or small containers of liquid EPDM for any repair or maintenance needs.