Company News

Inside a Bikepacking Frame Bag Program at Our Dongguan Plant

This month our Dongguan high-frequency welding workshop moved a waterproof bicycle frame bag program from sample confirmation into first production. The bag is a full-triangle frame pack built for gravel and bikepacking use: a diamond-ripstop TPU-faced shell, welded gusset, welded hook-and-loop anch......

How a High-Visibility Roll-Top Dry Bag Order Gets Sewn, Checked and Boxed

Most factory photography stops at the welding machine, because that is the part that looks like manufacturing. The part that actually decides whether a container arrives clean is the last three metres of the line — the sewing benches, the finishing tables, the count cards, the poly bags and the cart......

Welding the Hardest Part of a Dry Bag: The See-Through Window

DONGGUAN, China — [July], 2026 — A production run of see-through roll-top dry bags is moving through the high-frequency welding lines at Sealock (Dongguan Yifulong Outdoor Products Co., Ltd.) this week. Built for an overseas brand customer, the bags pair a black waterproof body with a clear front wi......

Dry Bag Factory: Production Capacity and Quality Standards

Sealock is a dry bag factory producing OEM and wholesale waterproof bags from plants in China and Vietnam. Two numbers decide whether a factory can carry a brand's program: how much it can actually make, and how consistently it makes it right. Both are routinely overstated across the supply base, an......

Waterproof Dry Bag Manufacturer: Factory Capabilities and Production Process

Sealock is a waterproof dry bag manufacturer supplying OEM and wholesale production from vertically integrated factories in China and Vietnam. When a brand is choosing a factory rather than a product, the questions change: not "what does this bag cost" but "what can this plant actually make, at what......

Dry Bag Manufacturer: OEM Waterproof Bag Solutions for Global Brands

Sealock is a dry bag manufacturer offering OEM and ODM waterproof bag production for global brands, importers, and private-label programs. An OEM waterproof bag is the sum of its material, closure, hardware, seam, and carry choices — and a brand that specifies each of those deliberately gets a produ......

Dry Bag Manufacturer: OEM & Custom Waterproof Bag Production Guide

Sealock is a dry bag manufacturer supplying wholesale, OEM, and ODM waterproof bags to brands and distributors worldwide, with welding, tooling, testing, and quality control kept in-house across two factories. This guide is written for buyers evaluating a waterproof bag supplier: what separates a re......

40L Waterproof Motorcycle Tail Bag: Storage Capacity and Touring Benefits

Sealock manufactures the 40L waterproof motorcycle tail bag for wholesale and OEM buyers worldwide, and 40 liters is the size that turns a bike into a tourer: enough for multi-day luggage on the pillion seat or rack without the width of hard panniers. On a motorcycle a bag is not just storage — it r......

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