Hey, folks! If you’ve spotted small cracks or holes in your RV roof membrane, don’t panic but don’t delay either. I’ve been fixing RVs for 10+ years, and I can tell you those little issues can turn into big leaks if you ignore them. But with the right products, you can patch things up and keep your RV dry. Let’s talk about two solid options – Eternabond tape and Dicor self-leveling sealant – plus a few others worth considering. An ounce of prevention is worth a pound of cure, so let’s get that roof patched!
Know your roof first
Before you grab any product, figure out what your roof’s made of. Most RVs have rubber roofs like EPDM or TPO. Some have fiberglass, and a few older ones might be metal. Each material plays nice with certain products. Eternabond and Dicor work well on rubber and fiberglass, but always check the label to be sure it matches your roof. Got a TPO roof? Double-check compatibility, as some products stick better to EPDM.
Eternabond tape: the tough patch
Eternabond tape is like duct tape on steroids for RV roofs. It’s a sticky, waterproof microsealant tape that bonds to rubber, fiberglass, and even metal. I’ve used it to cover hairline cracks, small holes, and seams that look iffy. It’s great for flat surfaces and can last 20 years if you put it on right.
Here’s how to use it:
- Clean the area well. Use rubbing alcohol or acetone – but go easy, as acetone can harm rubber if you overdo it.
- Cut the tape to size. A 4-inch width works for most patches, but 6-inch is better for bigger seams.
- Peel off the backing and press it down firm. Use a roller or your hands to smooth out bubbles.
- Some folks add Dicor sealant along the tape edges for extra protection, but I’ve found it holds fine without it.
One catch: Eternabond is a bear to remove. If you need to replace a vent or skylight later, you’ll be cursing it. So, avoid taping around stuff you might swap out. It’s best for permanent fixes on flat membrane areas or seams. I’ve seen it save roofs from leaks, but prep is key – a dirty surface means a weak bond.
Dicor self-leveling sealant: the go-to goop
Dicor self-leveling sealant is my go-to for cracks and holes on horizontal surfaces. It’s a thick, white goo that flows into gaps and hardens to a flexible seal. It sticks to EPDM, TPO, fiberglass, and metal, making it super versatile. I use it around vents, seams, and screw heads where tape might be tricky.
Here’s the drill:
- Clean the spot with isopropyl alcohol to get rid of dirt and old sealant.
- Apply a thick bead – at least a half-inch wide – to cover the crack or hole. It’ll spread out and level itself.
- Let it cure for a day or two. It’ll form a tough, UV-resistant seal.
Dicor’s easier to remove than Eternabond, which is great if you need to redo a vent. But it can crack over time – check it every year and reapply if you see splits. I’ve fixed plenty of rigs with Dicor, and it’s a lifesaver for small repairs. Just don’t skimp on the amount – lay it on thick to cover screws and seams completely.
Other products to consider
Sometimes, you need more than tape or sealant. Here are a couple of extras I keep in my toolbox:
- Butyl rubber tape: This is a budget-friendly tape, narrower than Eternabond, great for tight spots like vent edges. It’s not as durable – maybe 4-5 years – but it’s easy to apply and remove.
- Liquid roof coatings: For larger areas with lots of cracks, a liquid coating like Heng’s Rubber Roof Coating can seal everything. Brush it on over cleaned cracks after patching with Dicor or Eternabond. It’s like giving your roof a new skin.
List of Products Recommended in This Article
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Tips from the shop
Take your time to clean the roof – dirt’s the enemy of a good seal. Don’t use silicone caulk from the hardware store – it won’t stick to RV roofs and makes a mess. And avoid petroleum-based cleaners like mineral spirits on rubber roofs unless you’re super careful; they can swell the membrane.
Check your roof every spring and fall. Small cracks grow fast, especially after a hot summer or freezing winter. If you would rather not mess with sealants and tape, call me @ 706-970-1854. I can come to your place or you can bring your rig by the shop. I’d rather you get it right than deal with water damage later.
Safe travels, friends!