Impulse Heat Sealer for Mylar Bags
Impulse Sealer for Mylar Bags
Impulse sealers for mylar bags create an airtight hermetic seal on foil-lined and metallized pouches — the type used for long-term food storage, supplement packaging, and speciality food retail. PackSealer stocks 300mm to 500mm widths from £106, with fast UK dispatch on stock items.
How mylar seals with an impulse heat sealer
Mylar (metallized PET/foil laminate) has an inner polyethylene layer that fuses under heat. An impulse sealer fires a short, controlled burst to weld that inner layer — creating an oxygen and moisture barrier without degrading the foil outer. The result is a permanent, airtight seal.
The same sealer works across all foil-lined and metallized formats: stand-up pouches, flat heat-seal bags, gusseted bags, and multi-layer laminates. Adjustable sealing time accommodates thicker foil gauges.
Choosing the right seal width for your bag size
Mylar bags vary widely. Match the sealer to the widest opening you'll seal:
- 300mm — small sample bags and flat pouches up to approximately 280mm wide
- 400mm — standard quart-size and most retail stand-up pouches; the most commonly ordered size
- 500mm — large flat storage bags, gallon-size pouches, and wider gusseted formats
The PSH402 (400mm, £108.98) covers the majority of mylar bag formats used in food storage, supplement packaging, and small-batch food production.
What these sealers are used for
Artisan food and drink producers
Coffee roasters, tea packers, spice blenders, and snack brands using foil laminate bags for barrier performance and retail shelf presence. Consistent seals protect aroma, extend shelf life, and look professional at point of sale.
Supplement and health brands
Vitamins, protein powders, herbal blends, and functional foods packed in metallized stand-up pouches. Food-grade seals, consistent results batch after batch — important when margins depend on zero waste.
Contract and co-packers
Businesses sealing foil sachets across multiple client SKUs in the same session. Adjustable sealing time handles different foil gauges without changing machines. Foot-pedal models free both hands and speed up throughput.
Long-term storage and emergency food brands
Dehydrated goods, freeze-dried meals, and bulk grains sealed with oxygen absorbers for 5–25 year shelf life. Mylar's combined oxygen and moisture barrier is the industry standard in the emergency food sector.
Impulse sealers for mylar bags
Replacement parts stocked for every sealer we sell
Heating wire, PTFE strip, and foam pads — all available individually or as complete kits. Most users replace the wire and Teflon after 6–12 months of regular use. Order the spares kit at the same time as your machine and you won't be caught short.
Shop Spares Kits →What customers say
"Wasn't sure which machine was most suitable for my requirements, phoned up and spoke to a very friendly and knowledgeable staff member. Ordered a machine based on their advice and it's just what I needed. Would highly recommend."
"Great reliable heat sealer and they've got the spares in stock too."
"Such a helpful service. Chris really went above and beyond to help me when my pack sealer stopped working. Couldn't recommend highly enough!"
Common Questions
Yes. Impulse sealers melt the inner polyethylene layer of the mylar pouch, creating an airtight hermetic seal. The seal itself never touches the food — it's a heat-fusion of the pouch material. All impulse sealers sold by PackSealer are suitable for food-grade packaging applications.
Choose a sealer at least 20mm wider than your bag opening. The 300mm sealer suits pouches up to 280mm wide — typical for 100–250g bags. The 400mm covers most 250–500g stand-up pouches and is our most popular size. The 500mm handles larger retail bags and bulk pouches. If you regularly seal different bag sizes, size up.
Yes — seal below or above the zip-lock. For long-term storage, apply the seal above the zip-lock for a permanent hermetic closure. For retail resealability, seal above the product fill line and leave the zip-lock accessible. Never seal through the zip-lock itself as this causes an uneven seal.
Heating elements are a consumable part — they wear out over time with heavy use. PackSealer stocks replacement elements, PTFE tape, and foam strips for every model we sell. The PSH402 spares kit (£14.99) contains everything you need to rebuild the sealing jaw. Most repairs take under 10 minutes.
All impulse sealers on this page are UK-stocked in Solihull, Birmingham. Stock items dispatch fast from our Solihull base and typically arrive within a few working days. Call 0121 704 0294 to confirm stock and timing before you order.
Not sure which width you need?
Call us on 0121 704 0294 — we'll match the right sealer to your bag size and volume. UK-stocked, fast dispatch on all models.
Shop Impulse Sealers → Or call: 0121 704 0294 (Mon–Fri, 9am–5pm)