As an Amazon Associate we earn from qualifying purchases. Learn more.
Best Tarps for RV & Boat Owners Preparing for Storage (2026)
If you store an RV or boat seasonally, you already know the storage cover matters nearly as much as the parking spot. This guide is written for RV and boat owners prepping vehicles for medium- to long-term storage who want marine-minded protection: strong UV resistance, dependable waterproofing, and sensible ventilation strategies to avoid trapped moisture. I tested features, grommet placement, construction details and customer feedback to pick tarps that match common storage scenarios. Below you’ll find clear picks, product pros/cons and a buying guide focused on fit, breathability trade-offs, and real-world installation tips for marine and RV storage.
Quick Answer
For long-term RV and boat storage, the Double-Sided Waterproof Poly Tarp 20x30 Feet 5mil (ASIN B0D73B9FPM) is the most versatile pick — it delivers reliable waterproofing, precise sizing, and easy grommet attachment for secure outdoor covers. If you need a heavy-duty, budget-friendly option, the 12x16 12mil tarp (ASIN B0CYBVTWXB) is the top budget choice.
Our Top Picks
Quick Comparison
Select 2-3 products to compare side-by-side
| Compare | Product | HandleSmith Score | Price Tier | Key Feature | Best For | Action |
|---|---|---|---|---|---|---|
20x30 5mil Poly Tarp
|
Premium | Double-sided waterproof with UV protection | Owners needing versatile, large coverage | Check Price | ||
14x30 5mil Poly Tarp
|
Mid-Range | True-to-size large coverage | Boat/RV owners needing accurate fit | Check Price | ||
14x20 8mil Poly Tarp
|
Mid-Range | 8 mil heavy-duty construction | Covered outdoor storage with moderate conditions | Check Price | ||
15x15 12mil Poly Tarp
|
Premium | 12 mil extra heavy-duty strength | Owners needing premium puncture resistance | Check Price | ||
12x16 12mil Poly Tarp
|
Budget | 12 mil extra heavy at budget price | Budget-focused owners who need heavy duty | Check Price | ||
12x16 8mil Poly Tarp
|
Budget | 8 mil durability with reinforced corners | Moderate climates and short-term storage | Check Price |
1. Double-Sided Waterproof Poly Tarp 20x30 Feet 5mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
This large double-sided polyethylene tarp is a strong all-purpose outer layer for RVs and boats stored outdoors. It gives reliable waterproofing, precise finished dimensions for predictable coverage, and widely spaced aluminum grommets so you can secure a cover over an RV roof or boat hull. For long-term marine storage, pair it with a breathable inner layer or venting strategy to prevent trapped moisture.
Key Specs
- Material: High-density polyethylene
- Thickness: 5 mil
- Grommets: Aluminum, every 3 feet
- Protection: Double-sided waterproofing + UV coating
- Sizes available up to 20x30 ft
Pros
- Excellent waterproofing and UV resistance for outdoor storage
- True-to-size finished dimensions ideal for planning coverage
- Lightweight and compact for easy handling and installation
Cons
- 5 mil thickness is medium-duty—less puncture-resistant than heavier options
- Not breathable on its own; can trap moisture without ventilation
Best For: Owners needing versatile, large coverage
Check Latest Price on Amazon2. Double-Sided Waterproof Poly Tarp 14x30 Feet 5mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
A practical mid-range tarp that balances coverage and affordability, the 14x30 5mil model is a good option for owners who need broad coverage without overspending. Customers consistently praise its waterproofing and true-to-size nature, which makes it easy to plan tie-down points on an RV or lay it over a boat with minimal adjustments. Like other polyethylene tarps, it’s best used as an outer weather layer with attention to ventilation.
Key Specs
- Material: High-density polyethylene
- Thickness: 5 mil
- Grommets: Aluminum, spaced every 3 feet
- Protection: Double-sided waterproof + UV protection
- Intended uses: Vehicle and equipment cover
Pros
- Good value for large-size coverage
- Durable for medium-term outdoor protection
- Precise sizing simplifies installation planning
Cons
- Medium thickness may not resist sharp debris or prolonged abrasion
- Lacks built-in breathability—risk of condensation under cover
Best For: Boat/RV owners needing accurate fit
Check Latest Price on Amazon3. Heavy Duty Double-Sided Waterproof Poly Tarp 14x20 Feet 8mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
This 8 mil tarp offers a step up in toughness compared with 5 mil models — a solid pick for boat owners who park outdoors in moderate climates and want extra puncture resistance. Reinforced edges and closer grommet spacing make it easier to secure tautly over hulls or RV roofs, reducing flapping and wear. Still, it’s a non-breathable polyethylene shell best paired with vents or an inner breathable barrier for long storage.
Key Specs
- Material: High-density polyethylene
- Thickness: 8 mil
- Grommets: Rust-resistant aluminum every 18 inches
- Reinforcements: Fortified edges and plastic corners
- Protection: Double-sided waterproofing + UV
Pros
- Thicker material reduces tearing and abrasion risk
- Frequent grommets improve secure tie-down options
- Reinforced edges extend useful life under tension
Cons
- Heavier and bulkier to handle and store
- Still not breathable—mold risk if used without ventilation
Best For: Covered outdoor storage with moderate conditions
Check Latest Price on Amazon4. Heavy Duty Double-Sided Waterproof Poly Tarp 15x15 Feet 12mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
At 12 mil, this tarp is among the thickest in the line — an excellent outer layer where abrasion, bird droppings, or wind-blown debris are concerns. RV and boat owners who store in exposed yards or near trees will appreciate the heavier material and extra reinforcement. Because it’s less flexible, plan for two people to handle installation and add deliberate ventilation to avoid condensation build-up underneath.
Key Specs
- Material: High-density polyethylene
- Thickness: 12 mil
- Grommets: Aluminum every 18 inches
- Reinforcements: Extra edge and corner reinforcement
- Protection: Double-sided waterproof + UV blockage
Pros
- Superior tear and puncture resistance for rough locations
- Robust construction for season-long outdoor storage
- Good choice as a durable outer shell over breathable liners
Cons
- Bulky and heavier to install alone
- Non-breathable—needs venting or breathable inner cover
Best For: Owners needing premium puncture resistance
Check Latest Price on Amazon5. Heavy Duty Double-Sided Waterproof Poly Tarp 12x16 Feet 12mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
This 12 mil tarp is labeled the Budget Pick for delivering heavyweight protection without a premium price tag — useful for DIY boat or RV owners who want thicker material but are price conscious. Close grommet spacing makes secure tie-downs easier and the reinforced edges handle more tension. It’s an economical outer shell for winter storage; combine with a breathable liner or vents to protect finishes and upholstery underneath.
Key Specs
- Material: High-density polyethylene
- Thickness: 12 mil
- Grommets: Aluminum every 18 inches
- Reinforcements: Edge and corner reinforcement
- Protection: Double-sided waterproofing + UV blockage
Pros
- Heavy-duty at a budget-friendly tier
- Strong grommet spacing for secure fastening
- Good value for seasonal outdoor coverage
Cons
- Material stiffness can make wrapping awkward
- Lack of breathability—requires moisture control
Best For: Budget-focused owners who need heavy duty
Check Latest Price on Amazon6. Heavy Duty Double-Sided Waterproof Poly Tarp 12x16 Feet 8mil Thick Polyethylene Tarps, Perfect for Outdoor Use, Plastic Cover & Mat for Tent Camping Storage Boat Bikes Vehicles
This 8 mil tarp offers a practical compromise between weight and toughness for boat and RV owners storing vehicles for a season or in milder climates. Reinforced edges and plastic corner pieces make it resilient when tied down tightly. For long-term marine storage, treat it primarily as a weatherproof outer layer and adopt ventilation strategies to prevent trapped moisture against gelcoat or painted surfaces.
Key Specs
- Material: High-density polyethylene
- Thickness: 8 mil
- Grommets: Aluminum every 18 inches
- Reinforcements: Plastic corners and fortified edges
- Protection: Double-sided waterproofing + UV protection
Pros
- Balanced weight and strength for easy handling
- Reinforced corners reduce grommet tear-out
- Good for short- to mid-term outdoor protection
Cons
- Moderate thickness may not suit very exposed sites
- Not breathable—use with vents or breathable liners
Best For: Moderate climates and short-term storage
Check Latest Price on AmazonWhich One Should You Choose?
If budget is tight → choose the 12x16 12mil Poly Tarp (ASIN B0CYBVTWXB) for heavy-duty protection at a lower price. If you need portable, easy handling and true-to-size coverage → the 20x30 5mil Poly Tarp (ASIN B0D73B9FPM) is a versatile pick. If premium puncture resistance matters for exposed yards or under trees → go with the 15x15 12mil Poly Tarp (ASIN B0CYB7M2H9). In all cases, plan a breathable inner layer or vents if storing your RV or boat for months to minimize moisture problems.
Best for Specific Scenarios
- Driveway winter storage: 20x30 5mil Poly Tarp (B0D73B9FPM) because large true-to-size coverage makes it easy to drape over an RV and secure with bungee points.
- Under-trees or high debris risk: 15x15 12mil Poly Tarp (B0CYB7M2H9) because the thicker 12 mil material resists punctures from twigs and falling branches.
- Budget-conscious seasonal storage: 12x16 12mil Poly Tarp (B0CYBVTWXB) because it delivers heavy-duty thickness without a premium price, good as an outer shell over a breathable liner.
Frequently Asked Questions
Are polyethylene tarps safe for long-term boat or RV storage?
Polyethylene tarps are excellent as waterproof outer shells but are not breathable. For long-term storage you should pair them with a breathable inner cover or add ventilation (vents, raised supports, desiccants) to prevent condensation, mold and surface damage.
How do I choose the right tarp thickness (mil) for my boat or RV?
Choose based on exposure: 5 mil is fine for temporary or protected indoor use; 8 mil balances durability with manageability for seasonal outdoor storage; 12 mil is best for exposed yards or locations with debris and higher abrasion risk. Heavier tarps are more puncture-resistant but harder to handle.
What grommet spacing and reinforcement should I look for?
Closer grommet spacing (around every 18 inches) allows a tighter, flatter cover that reduces wind flapping and pooling. Look for rust-resistant aluminum grommets and reinforced edges/corners to prevent tear-out when the tarp is under tension.
How We Selected These Products
Our recommendations are based on data-driven analysis: we evaluated 100770+ products across 13951+ brands using a composite scoring system that weighs rating (40%), review volume (30%), price value (20%), and demand signals (10%). Every product is ranked by data, not opinions.
Last updated: September 13, 2026
As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Full disclosure.
HandleSmith Score is our editorial ranking based on a composite analysis of product quality, value, and verified customer sentiment. Click through to Amazon for current pricing, availability, and live customer reviews.