Transporting your kayak safely and conveniently is essential for any paddling enthusiast. DIY kayak foam blocks provide an effective, affordable method to secure kayaks on car roofs without expensive racks. We’ve selected five top foam block solutions that cater to various transport needs along with versatile craft foam blocks ideal for custom DIY projects. The following table offers a quick glance at these products for easy comparison.
| Product | Brand | Type | Dimensions | Special Features |
|---|---|---|---|---|
| Seattle Sports Sherpak Kayak Foam Block | Sherpak | Universal Fit Roof Rack Foam | 14″ W x 8″ D x 4″ H | Non-skid bottom, durable, economical transport |
| WOOWAVE Kayak Carrier Deluxe Kit | WOOWAVE | Foam Block Kit with Tie-Downs | 12″ length foam blocks | Adjustable tie-downs, UV resistant, portable |
| Generic Scouttech Outfitters Kayak Foam Block | Generic | Simple Foam Block | 41 cm x 8 cm x 10 cm | Snug fit, basic secure tie down |
| Attwood Universal Rack-Free Kayak Carrier Kit | Attwood | Complete Foam Block and Strap Kit | Standard sized foam blocks | Angled blocks, cushioned support, includes straps |
| Juvale 4 Pack Foam Cube Squares for Crafts | Juvale | Craft Foam Blocks | 6″ x 6″ x 6″ | Versatile for DIY customization and decor |
Seattle Sports Sherpak Kayak Foam Block For Universal Roof Rack

The Seattle Sports Sherpak Kayak Foam Block offers a universal fit designed to stabilize most kayaks on vehicle roofs. Its gray foam measures 14 inches wide, 8 inches deep, and 4 inches tall, sized to provide reliable support across a variety of kayak hull shapes. The non-skid bottom ensures these blocks stay firmly in place during transport, preventing slippage. This option is a cost-effective way to secure your kayak without buying expensive racks, made from premium durable materials for long-lasting use. Installation requires no tools, simplifying quick and easy kayak transport.
WOOWAVE Deluxe Kayak Carrier Kit With Tie-Downs

This complete kayak carrier kit from WOOWAVE includes foam blocks, adjustable tie-downs, and load straps, offering a comprehensive solution for kayak transport. The 12-inch EVA foam blocks feature a gunnel-style profile that fits various load bars including round, square, and oval shapes. Additionally, they provide UV resistance and anti-tear durability for long-lasting use. The included tie-downs have adjustable cam buckles, ensuring your kayak stays firmly secured during transit. Lightweight and portable, it’s easy to install and remove with instructions and a storage bag provided.
Generic Scouttech Outfitters Kayak Foam Block

The Generic Scouttech Outfitters foam block provides a basic, snug fit to most cars to assist in tying down kayaks securely. Measuring 41 cm long by 8 cm wide and 10 cm high, these foam blocks offer a simple yet effective way to prevent scratching and shifting during transit. Ideal for customers seeking a straightforward, no-frills approach to kayak transportation, they suit DIY enthusiasts looking for a practical and functional foam block solution.
Attwood Universal Rack-Free Kayak Carrier Kit with Foam Blocks

The Attwood kayak carrier kit includes more than just foam blocks—it comes with straps, buckles, and guy ropes providing a complete transportation setup. The angled foam blocks cushion the kayak and prevent damage to your vehicle’s roof, ensuring a secure fit without scratches. This kit is designed for customers who want an all-in-one solution that’s simple to use yet effective for long trips or frequent kayak transport. Adjustable straps ensure kayak stability against wind and road movement.
Juvale 4 Pack Craft Foam Cube Squares for Custom Projects

While not sold as kayak blocks, Juvale’s 6-inch foam cubes offer DIY enthusiasts a versatile crafting option to custom-cut into foam blocks for kayak transportation or padding. Their smooth polystyrene surface is ideal for creative modification, painting, and shaping. These cubes are also great for arts, flower arrangements, and model-making. They suit paddlers looking to build a personalized foam block support system or other custom kayak care projects.
Buying Guide for DIY Kayak Foam Blocks
Choosing the right foam blocks to transport your kayak depends on several factors. Here are key points to consider:
- Compatibility and Size: Ensure foam blocks fit your vehicle’s roof rack or crossbars and accommodate your kayak’s hull shape. Universal-fit blocks provide flexibility across many roof types.
- Material Quality: EVA foam or premium dense foam provide durability, resistance to UV rays, and good shock absorption. Non-skid bottoms add stability on vehicle roofs.
- Additional Hardware: Kits including adjustable tie-down straps and load straps offer complete security. Tie-down length and strength are crucial for safe anchoring.
- Portability: Lightweight, easy-to-install blocks simplify loading and unloading, especially for frequent paddlers.
- Customization Options: Craft foam blocks allow DIY customization but require careful cutting and securing methods for effective transport use.
- Protection Features: Angled or V-shaped blocks cushion the kayak while preventing damage to the car roof or kayak hull, which is vital on long journeys.
- Budget: Foam blocks range from economical designs to full kits. Decide whether you want a simple block or a comprehensive carrier kit with straps.
Considering these perspectives helps ensure you select foam blocks that suit your kayak size, vehicle setup, and transport frequency for safe, hassle-free outdoor adventures.