Mylar Bags

Mylar Bags | The Ultimate Barrier for Freshness & Discretion

Light, air, and moisture are the enemies of quality. At R420.ie, our Mylar bags act as a professional-grade shield, using an aluminium-foil layer to create a total barrier against the elements. These bags aren't just "smell-proof"—they are engineered to stop the degradation process entirely, ensuring your stash remains potent, aromatic, and perfectly preserved.

The Science of Mylar: Why It’s Superior

Mylar is a specialised polyester film that, when laminated with aluminium, offers protection that standard plastic simply cannot match:

100% Light-Proof: UV rays break down the essential compounds in your herbs, causing them to lose colour and potency. Our opaque Mylar bags block all light, acting like a "darkroom" for your stash.
Oxygen & Moisture Barrier: Oxygen causes herbs to go stale and lose their aroma, while moisture can lead to mould. Mylar has an incredibly low transmission rate, locking "good" moisture in and keeping "bad" air out
Total Odour Control: The metallic layer is non-porous. Even the most pungent varieties are completely contained, making these the most discreet storage option available in Ireland.

Sizes for Every Harvest

As Ireland's leading smoke shop, we stock Mylar bags in the industry-standard sizes to help you stay organised:

3.5g (The Eighth): Compact and perfect for daily use or sampling different varieties.
7g & 14g (The Quarter & Half): Medium-sized pouches with a "stand-up" bottom gusset for easy filling.
28g (The Ounce): Large, heavy-duty bags designed for significant storage needs.
Bulk Storage: We also carry larger bags capable of holding 112g (quarter pound) and up for serious collectors.

How to Achieve a "Permanent" Seal

While all our Mylar bags feature a high-quality, resealable "grip-lock" zipper for daily access, they are also heat-sealable for long-term security:

Tamper-Evident: By using a standard heat sealer (or even a hair straightener on a medium setting), you can seal the top edge above the zipper. This creates an airtight, factory-fresh seal that must be torn open using the built-in "tear notches.
The Pro-Tip: For the absolute best results, pair your Mylar bags with Integra Boost or Boveda humidity packs. The bag keeps the environment stable, while the pack ensures the moisture level stays exactly at 58% or 62%.

Best Value & Discretion in Ireland

Whether you prefer a sleek Matte Black finish, a clear-front "window" bag, or a vibrant holographic design, R420.ie offers the best prices in the country. Our Mylar bags are puncture-resistant, food-safe, and shipped discreetly from our Irish warehouse.