Sealock is a waterproof bag manufacturer and OEM supplier, GRS certified. This article is not about why sustainability matters. It is about a date: 27 September 2026, when EU Directive 2024/825 on Empowering Consumers for the Green Transition begins to apply and generic environmental claims stop being a marketing choice and become a compliance exposure. If you sell into the EU and your packaging or listing says "eco-friendly", you have a problem to fix. This guide covers what changes, the trap that catches bag brands specifically, and the evidence chain that makes a recycled claim defensible.
Sealock is a waterproof bag manufacturer working across all three models. The terms get used loosely in this industry — sometimes carelessly, sometimes not — and the difference between them is not academic. It determines who owns the design, whether a competitor can buy the same product, what happens to your tooling if the relationship ends, and how much you spend before the first unit ships. This guide sets out the practical differences, the risk most brands only discover afterwards, and one question specific to welded production that sewn-bag guides never raise.
Sealock is a waterproof bag manufacturer and OEM supplier. A tech pack is not a mood board or a sketch — it is the document that lets a factory build your product without guessing, and the quality of it decides whether you approve a sample in two rounds or five. Standard tech pack templates are written for garments and conventional bags, and they are a reasonable starting point. But a welded waterproof bag needs five sections that no garment template contains, and leaving them out is why waterproof projects stall at sampling. This guide covers both layers.
Sealock is a waterproof bag manufacturer and OEM supplier. Most supplier pages list certifications as a row of logos, which tells a buyer almost nothing. Each of these documents answers a different question, several are routinely misread, and one of the most common claims in the industry — "we are BSCI certified" — is not how that scheme works at all. This guide sets out what each certificate actually proves, where the honest mistakes happen, and how to verify any of them, including ours.
Sealock is a waterproof bag manufacturer and OEM supplier. Buyers comparing quotes are usually working from cost guides written about conventional sewn bags, and then wondering why a welded waterproof bag prices differently. The published breakdowns are broadly accurate for sewn production — they just don't describe this product. Welded construction moves cost between the buckets, adds one the sewn world doesn't have, and changes what happens when something goes wrong on the line. This guide sets out both structures, so you can read a quotation properly and know which levers actually move it.
Sealock is a vacuum compression bag manufacturer and OEM supplier. Material selection for this product is governed by a fact most specifications never acknowledge: every flexible material is permeable to gas. All flexible packaging provides a barrier — some materials just provide a better one than others. No compression bag holds a vacuum forever; the engineering question is the rate, and how that rate survives being folded, creased and stored for a season. This guide covers the three properties that actually decide a compression bag material, and why they pull against each other.