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Insights

We are glad to share with you about the results of our work, company news, and give you timely developments and personnel appointment and removal conditions.

Kayak Dry Bags & Packs — RF Welded, Floating | OEM, MOQ 300
Sealock is a kayak bag manufacturer in China supplying OEM, ODM, and wholesale buyers worldwide. A kayak is the hardest environment a soft bag routinely faces: the hull sits low in the water, the cockpit and hatches are open to spray, rain and wake, and a capsize turns "water-resistant" into a claim the customer tests personally. A kayak bag has to do three things an ordinary bag cannot — stay dry when fully submerged, float when it comes loose, and compress and lash down so it doesn't move. This overview covers how those requirements translate into construction, the range, and the sourcing terms.
2026-08-25
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How to Choose a Dry Bag Supplier
Sealock is a dry bag manufacturer and OEM supplier. Choosing a supplier for this category is deceptively risky, because the product looks simple and the sample almost always passes. A dry bag is a welded tube with a roll-top — any supplier can source something that appears waterproof, and far fewer can build something that genuinely stays waterproof across ten thousand units and two seasons of use. This guide sets out how experienced buyers vet a dry bag supplier, in the order they check it.
2026-08-24
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How Dry Bags Are Tested Before Shipment
Sealock is a dry bag manufacturer and OEM supplier. Every factory says its bags are tested. The question that separates suppliers is a narrower one: tested how, on which units, and can you see the record? A dry bag is a single welded chamber with no lining to hide a weak seam, so testing is both easier to do honestly and easier to fake convincingly. This guide sets out the full inspection sequence a dry bag order passes through — from incoming rolls to the container door — and the questions a buyer should ask at each stage.
2026-08-24
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Dry Bag Capacity Guide for Wholesale Buyers
Sealock is a dry bag manufacturer and wholesale supplier. For a distributor, capacity is not a technical question — it's an inventory decision. Dry bags are one of the few outdoor products sold almost purely on litres, which means the sizes you stock determine your sell-through, how much cash sits in slow rungs of the ladder, and whether a customer finds the bag they came in for. This guide covers which capacities actually move, how deep to go on each, and the packing and labelling details that catch wholesale buyers out.
2026-08-24
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Roll Top Dry Bag vs Waterproof Zipper Dry Bag
Sealock is a dry bag manufacturer and OEM supplier. Ask around the paddling world and you'll get two confident and apparently contradictory answers: that a roll-top is the most reliable seal there is, and that only a proper waterproof zipper is genuinely submersible. Both are right, because they're measuring different things — one is talking about failure rate in the field, the other about sealing performance under sustained pressure. Our standard dry bag range is built around the roll-top, which is the right closure for the great majority of dry bag use; a waterproof zipper is available as a custom closure where a project genuinely calls for it. This guide separates the two so a brand can specify the closure its customers actually need.
2026-08-22
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Dry Bag Material Guide: TPU vs PVC
Sealock is a dry bag manufacturer and OEM supplier building in both TPU and PVC. The useful question in this comparison is not which material is better in the abstract — it's which performs better under the conditions a dry bag actually faces: rolled and unrolled several times a day, dragged across rock, left in a hot boat, packed away creased for a season, and expected to seal on the first attempt with cold hands. That framing gives clearer answers than a generic spec sheet, and it changes which material wins depending on the product.
2026-08-22
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