Best Tent Seam Sealer for Watertight Protection

Best Seam Sealer

Gear Aid Seam Grip + SIL Seam

Gear Aid Seam Grip WP Waterproof Sealant and Adhesive for Tents and Outdoor Fabric, Clear, 1 oz

After looking at all sorts of waterproofing products, we’re pleased to announce that Gear Aid Seam Grip + SIL Seam Sealer is the best tent seam sealer. Seam Grip is specially formulated to create a watertight barrier over tent seams and pinhole repairs in sil-nylon fabrics.

A single 1.5-ounce tube covers 24 feet of seams. It seals out moisture for a lifetime of dry camping. The watertight seal won’t peel or crack over time. Plus, it flexes right along with ultra-thin silicone tent fabric. 

Bottom line: If you’re looking for a seam sealer that will give you 100% waterproof protection, it has to be Gear Aid Seam Grip + SIL Seam Sealer. 

Best Tent Seam Sealers to Ensure a Dry Camping Experience

Preventing water seep through your tent’s seams couldn’t be simpler with our pick for the Best Tent Seam Sealer – See who came out on top.

Brian Connelly
Last Updated: July 26, 2020

Looking for an amazing tent sealer?

You’re in the right place! In this guide, we will be covering the following:

    • How to determine if you need tent sealer
    • How to choose a tent seam sealer
    • Reviews of the top seven tent seam sealers
    • Our top pick for the best tent seam sealer

A camping trip in the rain can be a particularly testing experience. While tent materials are usually waterproof, moisture has a way of seeping through the smallest pinholes and tightest seams. Many tents even come sealed but lose their waterproofing over time.

If you want to outfit yourself with a watertight shelter, you’re going to have to take some special steps to keep raindrops away. A reliable tent seam sealer serves as an extra layer of protection. However, tent seam sealers are not interchangeable. They must be paired up with a compatible fabric.

We set out to find a sealer that bonded well to a wide variety of tent materials. We wanted to be confident that no moisture was capable of creeping inside. 

Below, you’ll find seven of the best tent seam sealers. These products pair well with a variety of super-light outdoor fabrics. They are flexible, durable, and long-lasting.

How to Determine if You Need Tent Seam Sealant

Many tents have factory-sealed seams. However, tents without failing or non-existent tape may require an extra layer of waterproofing. Assemble your tent. Then, check to see if there is tape along the inside seams. If there isn’t, you may need to apply some seam sealer. You should also seal areas where the original tape is chipping off, cracking, or peeling.

Things to Consider When Buying Seam Sealer for Tents

Materials & Fabric Coating

Tents are made from a wide range of materials, many of which are coated. Check to see what type of fabric was used in the construction of your tent. Select a seam sealant that is compatible with your particular tent fabric. 

If your tent is made from a silicone-coated fabric, you will need to use a silicone-based sealant, such as Gear Aid Seam Grip + SIL Seam Sealer. If your tent is made from a polyurethane-coated fabric, you will need to use a urethane-based sealant. If you are unsure of what fabric you’re working with, reach out to your tent’s manufacturer.

Ease of Application

Most tent sealers come with at least one applicator. Caps that double as brushes and swabs are often integrated into the packaging. Sometimes, products will come with brushes of varying sizes. Sealants tend to be runny and sticky. A poor applicator selection may result in a mess.

Drying Time

Tent seam sealers take an average of 24 hours to cure, though there are some fast cure products that can dry in as little as two hours.

It is crucial that you carefully follow the manufacturer’s instructions to ensure your tent is seam-sealed properly.

Set your set in a dry area where it will not be disturbed until it is finished curing. Curing times may be impacted by temperature, humidity, and even airflow. Make sure to apply a thin, even coat. Think about setting your tents up inside to avoid bad weather and other disturbances. 

How to Seam Seal a Tent

1. Set up your tent:  Choose a dry, sunny day to seal your seams. Or else, consider working inside. Set your tent up as if you were camping. 

2. Cleanup the existing seams: Using a cloth and rubbing alcohol, clean up the existing seams. Take care to remove any cracked or peeling tape. 

3. Cover sensitive areas: Use masking tape to cover zippers and closures that run alongside your tent seams.

4. Seal the interior seams: Following the manufacturer’s instructions, apply a smooth, even line of sealant over your tent’s interior seams.

5. Seal the exterior seams: Repeat this process on your tent’s exterior seams. 

6. Let it cure: Curing times vary. It may take anywhere from 2 to 48 hours for your sealant to cure. 

7. Test it out: Once you are sure that your seams have cured, test them to ensure they are completely waterproof. 

FAQ: Frequently Asked Questions on Tent Sealant & Sealing Tent Seams

How Long Does Seam Sealer Take to Dry?

Drying, or rather curing, times vary between products. They are also impacted by weather and air conditions. Be prepared to wait 24 to 48 hours for your sealant to cure.

Reviews of the Best Seam Sealers for Tents

Gear Aid Seam Grip + SIL Seam Sealer

Best Tent Seam Sealer

Gear Aid Seam Grip WP Waterproof Sealant and Adhesive for Tents and Outdoor Fabric, Clear, 1 oz
  • Seal seams and permanently repair holes in tents, tarps, awnings, rainflys and camping gear like Thermarest sleeping pads
  • Treat up to up to 12’ of seams (1 oz) or repair torn outdoor fabrics with an adhesive that cures into a flexible rubber seal; also available in an 8 oz tube
  • Waterproof gear with a sealant that flexes with fabric and bonds to nylon, polyester, canvas, leather and vinyl
  • Apply it to repair or re-proof gear without worrying about the seal peeling or cracking; includes two applicator brushes
  • Packaging may vary

Gear Aid Seam Grip will help you make the most of your tenting experience. Specially formulated to work on silnylon (silicone/nylon) tent seams, rain flys, and camping gear – It will also bond well with other outdoor fabrics, including polyester and nylon, and canvas. 

It can be used to cover seams as long as 12 inches or even repair small tears and holes. 

The formula cures quickly, creating a flexible, rubbery bond. It takes roughly 6 hours for this product to cure fully. Seam Grip moves naturally with fabric. Plus, it never peels or cracks. This kit comes with two applicator brushes, one small and one big. However, you can also use the tube to apply it directly to your tent. 

Seam Grip + SIL bonds well to most tent fabrics. It quickly and instantly waterproofs outdoor gear with one tube being sufficient for about 24 feet. 

  • PROs

    • Two applicator brushes
    • Easy to squeeze tube
    • Moves with fabric
    • Inexpensive, full coverage
    • 100% waterproof
  • CONs

    • Lengthy cure time
Bottom-Line: Seam Grip + SIL is the best tent seam sealant for silicone-based tent fabrics.

Texsport Polyurethane Waterproof Seam Sealer

Best Spray Tent Seam Sealer

Texsport Polyurethane Waterproof Seam Sealer for Tents Backpacks and Outerwear Repair
  • Seam Sealer ideal for tents, backpacks, outerwear and all other synthetic fabrics
  • Colorless, washable, flexible. Odorless when dry
  • Reduces fading caused by the sun
  • Profession Strength, Protects new or cleaned fabrics from water or dirt
  • Non-toxic and odorless when dry

Texsport’s Polyurethane Waterproof Seam Sealer works a lot like spray paint. Simply dispense it onto a leaky seam on tents, backpacks, or outwear to create a reliable waterproof seal. As a colorless, odorless, and flexible substance, Texsport is a nearly invisible fabric amendment. However, some consumers have complained that it leaves dark fabrics with discolorations. 

You can use this polyurethane sealant on any synthetic material. It prevents the entrance of moisture and dirt as well as damage from UV rays. Plus, Each 14-ounce bottle contains enough substance for two small tents. 

  • PROs

    • Colorless, odorless, and non-toxic when cured
    • Moves with fabric
    • Can be used on synthetic tents, backpacks, and outwear
    • 14 ounces per can
    • Protects against UV damage
  • CONs

    • May discolor dark fabrics
Bottom-Line: If you are looking for a relatively quick and inexpensive solution to leaky outdoor gear, check out his phenomenal spray-on product.

Coleman Seam Sealer

Best Seam Sealer on a Budget

As one of the most influential budget tent manufacturers, it comes as no surprise that Coleman sells a proprietary seam sealer. This kit consists of a 2-ounce bottle of fast-drying water-based urethane and a foam applicator. It can be used to seal untaped seams, needle holes, and small tears on tents, tarps, backpacks, and more. 

This permanent moisture blocker cures quickly. It requires no mixing or prep. You simply dab it onto your target area and use the foam applicator to spread it into a thin, neat layer. When this seam sealer is applied correctly, dew and rain automatically bead on the exterior of your tent. It takes roughly 6 hours for this product to cure fully. The product is durable and crack-free. However, it is visibly noticeable when applied thick. 

  • PROs

    • Easy to apply with brush on bottle and foam applicator
    • Water-based urethane formula
    • Cures in 6 hours
    • A single bottle covers 20 to 30 feet
  • CONs

    • Somewhat gooey and visibly noticeable
Bottom-Line: This budget-friendly urethane formula will keep your tent and outdoor gear dry for days.

Gear Aid Silnet™ Silicone Seam Sealer

Best Tent Seam Sealer for Silicone

GEAR AID Seam Grip SIL Silicone Sealant for Silnylon Tents and Tarps, Clear, 1.5 oz
  • Seal up to 24 ft of seams with 1.5 oz of this durable, clear adhesive that bonds permanently to silicone-treated (silynylon) tents
  • Apply to ultra-light gear including silnylon backpacks; cures to a flexible, elastic seal that flexes and stretches with fabric
  • Creates a long-lasting, waterproof seal that won’t peel or crack over time; not affected by extreme heat or cold
  • Also ideal for applying on silnylon tarps, shelters, and rainwear to keep water out (previously known as SIL Net)
  • Packaging may vary

If you’re dealing with a strictly silicone-treated fabric, there’s no better sealant that Gear Aid’s Silnet™ Silicone Seam Sealer. This product can be used to seal seams, pinholes, and modest rips. 

Seam Grip SIL permanently bonds to silicone fabrics, creating a clear, glassy seal that is water repellent. It is somewhat challenging to apply an even bead of this compound. However, the kit does come with a small applicator brush. 

Overall, Silnet™ works quickly and efficiently. You’re just better off buying a small paintbrush or syringe if you want to avoid dealing with drips and smudges during the application process. 

  • PROs

    • Bonds well to silicone
    • Works on seams and repairs
    • Causes water to bead up on exterior of a tent
    • Clear and glassy
    • Bends with fabric
  • CONs

    • Messy application
Bottom-Line: There’s no better seam sealer for silicone-coated outdoor fabrics. 

KENYON Seam Sealer

Kenyon Seam Sealer Bottle, 2-Ounce
  • Aqueous urethane waterproof coating for seams
  • Handy applicator tip for ease of application
  • Put an end to leaky seams & joints

KENYON is a water-based urethane formula designed to seal tent seams for a lifetime of dry camping sessions. The translucent liquid goes on smooth with the help of a built-in plastic applicator. It penetrates, coats, and cures in one fell swoop. 

We recommend keeping a bottle of KENYON on hand for repairs. This product works well in most temperatures. One 2-ounce bottle is enough for a small tent. Seams are highly flexible and washable. 

This formula contains far fewer petrochemicals that traditional seam sealers. It’s easy to spread a thin line of it.

  • PROs

    • Built-in applicator tip
    • Repairs leaky seams and joints
    • Fixes repairs
    • Aqueous urethane formula
    • 75% fewer chemicals that the original KENYON formula
  • CONs

    • Slow curing tie
Bottom-Line: You don’t need to tinker with harsh chemical formulas to seal your leaky tent seams. KENYON Seam Sealer is a translucent liquid that penetrates and seals synthetic fabrics like a boss.

Gear Aid Fast Cure Seam Sure Sealant

Best Seam Sealer for Polyurethane

GEAR AID Seam Grip FC Fast Cure Sealant for Tents, Clear, 2 fl oz
  • Seal up to 60’ of seams on tents, tarps and awnings with this water-based seam sealant that cures in 2 hours at room temperature
  • Use this tent sealant on various outdoor fabrics including nylon, polyester, and canvas; previously known as Seam Sure
  • Dries to a long-lasting seal that is nearly invisible and flexes with fabric
  • Included applicator brush makes application quick and easy
  • Packaging may vary

One 2-ounce bottle of Gear Aid Fast Cure Seam Sure Sealant can cover over 60 feet of seams or an entire large family tent. The formula will also form a flexible rubber seal over small rips and tears. The built-in brush makes for easy, mess-free installations. It takes just 2 hours for this Gear Aid product to cure completely.

One application of Seam Sure enables campers to enjoy dry nights in the middle of downpours and dewy mornings. You can even use it to fill needle holes alongside your tent’s rainfly and seams. The formula will not crack or peel.

You can use Sure Seam on a wide variety of materials, including nylon, polyester, and canvas. It creates a phenomenally resilient waterproof bond. It can be messy at times. The applicator pours out quickly, so consider using a backup brush to create an even, fast-drying coat.

  • PROs

    • Can be used on polyurethane, nylon polyester, etc.
    • Dries clear and remains flexible
    • Crack-free waterproof seal
    • Cures in just 2 hours
    • Holds up well to temperature extremes
  • CONs

    • Somewhat messy
Bottom-Line: Seam Sure instantly sets to work, creating a waterproof barrier.

Coghlan’s Seam Seal

Best Mess-Free Applicator

Coghlan’s Seam Seal
  • Waterproofs sewn seams on nylon and other synthetic outdoor fabrics
  • Ideal for tents, tarps, rain gear, and backpacks
  • Colorless, flexible, and washable

Rounding out our list is the all-powerful Coghlan’s Seam Seal. The easy-to-apply water-based seam waterproofs seams on nylon and other synthetic fabrics. However, it pairs well most other fabrics too. 

As a colorless, flexible, and washable product, it blends right into most tent seams. Plus, it can be used on a wide variety of outdoor products, including backpacks, tents, and outerwear. Plus, it takes just 2 hours for this product to cure at room temperature. 

Coghlan comes in a mess-free bottle with a built-in applicator. You roll it into your desired surface, use the brush bristles to smooth it out, and wait for it to cure. It creates a nearly invisible waterproof barrier. Cover rates vary. However, one 2-ounce bottle should cover an average family tent or up to 60 inches of seams. 

  • PROs

    • Can be used on virtually all nylon and lightweight synthetic fabrics
    • For use on seams
    • Brush applicator
    • Odorless, colorless, flexible, resilient
    • Can be used on sewn, lap-felled, and folded seams
  • CONs

    • Bottle will leak if not tightened properly
Bottom-Line: This fume-free water-based seam sealer will fight back against major leaks.

Last update on 2020-08-10 / Affiliate links / Images from Amazon Product Advertising API

Share on facebook
Share on twitter
Share on pinterest
Share on email

Leave a Comment