SealLine® FAQ

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What is the difference between "splash-proof," "watertight," "waterproof" and "submersible"?

SealLine products use three ratings to describe water resistance:

  • Splash-proof: Withstands driving rain and light splashing.
  • Waterproof / Watertight: Withstands quick submersions and will float if dropped in the water. Most of our bags fall into this category and are suitable for canoe, kayak and rafting use where boats may tip, flip or be swamped.
  • Submersible: Withstands 1 meter of submersion for 30 minutes (IP-67 standard). Suitable for extreme and prolonged wet situations (Zip Duffles) and also electronics which are expensive and tend to sink in water.

With any such bags, water resistance depends on the user carefully and properly sealing the closure. For dry bags and HP Map Cases, this means a minimum of three tight and wrinkle-free rolls. For E-cases, Map Cases and Zip Duffles the zipper must be completely closed.

What is the difference between urethane, coated nylon, and vinyl dry bags?

Our premium urethane-coated dry bags (Black Canyon™ & EcoSee™) offer significantly greater puncture and abrasion resistance than vinyl while also being lighter weight. For example, our Black Canyon Boundary bags weigh approximately 8-14 oz. less than vinyl Boundary™ bags. In addition, they are less harmful to the environment than vinyl.

Our nylon dry bags are also urethane-coated and offer the best strength-to-weight ratio in a dry bag. Nylon has a much lower coefficient of friction than vinyl, so they are easier to slide into tight spaces, such as kayak compartments. They also remain pliable in extremely cold temperatures.

Our vinyl dry bags are economical and resistant to punctures, tears, and mildew. They withstand cracking and remain pliable at low temperatures. We utilize vinyl on our Baja bags, as well as our Boundary Pack, Pro Pack, and Zip Duffle. We also use a transparent vinyl with our See Bags, so you can see what's packed inside.

What is special about the Dry Seal closure?

Our exclusive design provides the best closure performance of any roll-down dry bag. The bag is held tightly together between paired vinyl strips.

Are the bags measured rolled or unrolled?

The measurements are for rolled bags with the minimum three folds.

Why do Kodiak Window and Taper Bags have a watertight purge valve?

The Kodiak bags are primarily designed for sea kayaking and have low friction nylon fabric exteriors to help them slide into Kayak compartments. The purge valves let you eliminate excess air, either while rolling closed, or while in the boat compartment to save precious hull space.

Is the zipper on the Zip Duffle really waterproof?

Yes, the Zip Duffle is our most waterproof bag. It’s made with a four-coil YKK zipper that is the same kind used in dry suits. It is indeed waterproof (meets IP-67: 1 meter submersion for 30 minutes) and the zipper is protected from abrasion by a vinyl over-flap. The zipper runs diagonally across the top of the bag, providing quick and easy access.

What does the rating on the Electronic Cases mean?

Electronic Cases meet the International Electronics Commission’s (IP-67) standard for submersible electronics. The symbol guarantees that, when properly sealed, E-cases will protect your gear from getting wet under 1 meter of water for 30 minutes.

Prop 65

What is California Proposition 65?

Proposition 65 is the Safe Drinking Water and Toxic Enforcement Act passed by voters in the State of California in 1986. The act was created to inform people about possible exposure to chemicals known by the State of California to cause cancer, birth defects and/or other reproductive harm.

What are the requirements of Proposition 65?

Proposition 65 requires that the Governor of California maintain and publish a list of harmful chemicals. The list is updated annually and includes chemicals that can be found in solvents, drugs, dyes, food additives, by-products of certain processes, pesticides, and tobacco products.

A chemical is listed if it has been classified as a reproductive toxicant or carcinogen by an "authoritative" organization on the subject. The U.S. Environmental Protection Agency, U.S. Food and Drug Administration, National Institute for Occupational Safety and Health, the National Toxicology Program, and the International Agency for Research on Cancer are considered authoritative for carcinogens. For reproductive toxicants, the authorities are the U.S. Environmental Protection Agency, U.S. Food and Drug Administration, National Institute for Occupational Safety and Health, and International Agency for Research on Cancer. Chemicals will also be listed if they are required to be labeled or identified as a carcinogen or as a reproductive toxicant by an agency of the state or federal government.

Why has SealLine placed a Proposition 65 label on its products?

Any company with ten or more employees operating or selling products within the State of California must comply with the requirements of Proposition 65. To comply, businesses are: (1) prohibited from knowingly discharging listed chemicals into sources of drinking water; and (2) required to provide a "clear and reasonable" warning before knowingly and intentionally exposing anyone to a listed chemical.

A Proposition 65 warning means that the business has evaluated the exposure and has concluded that it exceeds the "no significant risk level,” or that the business is providing a warning based on the presence of a “listed” chemical without actually evaluating the exposure.

SealLine is providing a warning based on our knowledge about the presence of one or more listed chemicals without attempting to evaluate the level of exposure. While using a SealLine product, the exposure to a “listed” chemical may be well within the “no significant risk” range, but out of caution, we have placed the Proposition 65 warning labels on our products.

Are consumers using a SealLine product with a Proposition 65 warning at risk?

The California government states: “The fact that a product bears a Proposition 65 warning does not mean by itself that the product is unsafe.” The government also explained, “You could think of Proposition 65 more as a ‘right to know’ law than a pure product safety law.”

A Proposition 65 warning means that the product contains one or more listed chemicals. By law, a warning is required unless the business proves that the exposure to the chemical poses "no significant risk." The "no significant risk" level for carcinogens is defined as the level which is calculated to result in not more than one excess case of cancer in 100,000 individuals exposed over a 70-year lifetime. Therefore, if you are exposed to the chemical in question at this level every day for 70 years, theoretically, it will increase your chances of getting cancer by no more than 1 case in 100,000 individuals so exposed.

The "no significant risk" level for reproductive toxicants is defined as the level of exposure which, even if multiplied by 1,000, will not produce birth defects or other reproductive harm. Therefore, the level of exposure is below the "no observable effect level," divided by 1,000. (The "no observable effect level" is the highest dose level which has not been associated with observable reproductive harm in humans or test animals.)

For further information about California’s Proposition 65, please visit