Clear Line Single Track Seal Top Bags
LK Packaging's Clear Line Single Track Seal Top Bags combine the convenience of a reclosable zipper with the security of a heat-sealable top. These versatile bags feature a single zipper track for easy opening and closing, plus a tamper-evident heat seal above the zipper for product integrity.
Key Features:
- Single Track Zipper: Press-to-close reclosable seal for repeated opening
- Heat-Sealable Top: Permanent seal above zipper provides tamper evidence
- Crystal Clear LDPE: Superior clarity showcases product quality
- Multi-Use Design: Ideal for industrial parts, retail merchandise, food service
- Durable Construction: Heavy-duty zipper withstands repeated use
- LK Quality: Manufactured by LK Packaging (formerly Elkay Plastics)
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Why Choose Single Track Seal Top Bags?
Single track seal top bags offer a dual-closure system that provides both convenience and security. The heat seal ensures products reach customers tamper-free, while the zipper allows for easy access and resealing after initial opening.
Benefits of Single Track Design:
- Tamper-Evident Security: Heat seal above zipper shows if bag has been opened
- Customer Convenience: Zipper allows resealing after first use (retail products, multi-use items)
- Product Protection: Keep contents fresh and protected from dust, moisture, contamination
- Professional Appearance: Crystal-clear bags showcase product quality
- Cost-Effective: Single zipper track costs less than double-track bags while providing excellent functionality
- Versatile Sizes: Available in multiple dimensions for various applications
Single Track vs Double Track Zipper Bags
| Feature | Single Track Seal Top | Double Track Zipper |
|---|
| Zipper Tracks | One track (interlocking ribs) | Two tracks (double seal) |
| Seal Strength | Good (suitable for most uses) | ✅ Excellent (extra secure) |
| Heat Seal Top | ✅ Yes (tamper-evident) | Optional |
| Cost | ✅ Lower (less material) | ⚠️ Higher |
| Best For | Retail, light industrial, food service | Heavy parts, lab samples, critical items |
Common Applications for Single Track Seal Top Bags
- Retail Packaging: Hardware, fasteners, craft supplies, small electronics
- Food Service: Bulk snacks, candy, coffee beans, dry goods (verify food-safe specs)
- Industrial Parts: Nuts, bolts, washers, O-rings, small components
- Healthcare & Lab: Medical supplies, specimen collection, sample storage
- E-Commerce: Multi-item kits, subscription box components, replacement parts
- Automotive: Replacement parts, accessories, fluids in sealed containers
How to Use Seal Top Bags
- Initial Sealing: Insert product, press zipper closed, then heat seal above the zipper for tamper evidence
- Customer Opens: Tear or cut above the heat seal to access the zipper
- Resealing: Press zipper closed after each use to keep contents fresh
- Storage: Bags can be stored upright or flat; zipper maintains seal integrity
Frequently Asked Questions
What is a single track seal top bag?A single track seal top bag is a clear polyethylene bag with one interlocking press-to-close zipper track plus a plain heat-sealable area above the zipper. You heat seal the top for tamper evidence at packing, and the end user cuts or tears above that seal and then uses the zipper to open and reclose the bag. Are Clear Line seal top bags food safe?LK Packaging Clear Line seal top bags are made from virgin low density polyethylene (LDPE), the resin family used throughout food packaging, and are widely used for bulk snacks, candy, coffee and dry goods. If you need documentation for direct food contact, contact Prism Pak and we will supply the FDA compliance statement for the specific item number. What sizes and thicknesses do Clear Line single track seal top bags come in?Clear Line single track seal top bags run from 3" x 5" up to 18" x 24", in both 2 mil and 4 mil gauges, with common stock sizes including 4x6, 5x8, 6x6, 7x8, 8x10, 9x12, 10x12, 10x13, 12x12, 12x15, 13x18 and 14x20. All sizes are sold by the case in bulk case quantities. What is the difference between 2 mil and 4 mil seal top bags?A 4 mil bag is twice as thick as a 2 mil bag, so it resists punctures and tears from sharp or heavy contents far better. Use 2 mil for light retail items, paperwork, apparel parts and food portioning; use 4 mil for hardware, fasteners, metal parts, tools and anything with sharp edges or corners. Do you need a heat sealer to use seal top bags?You only need a heat sealer if you want the tamper-evident top seal; the zipper alone closes the bag with no equipment at all. For the top seal, use an impulse heat sealer rather than a household iron, which cannot hold a consistent temperature. Contact Prism Pak if you need a sealer sized to your bag width. What is the difference between single track and double track zipper bags?Single track bags have one interlocking rib closure, like a standard consumer zipper bag, while double track bags have two parallel closures for extra seal security. Single track costs less and is the right choice for most retail, food service and light industrial packaging; double track is used for heavy parts, lab samples and critical contents. Can the zipper be opened and closed more than once?Yes. The press-to-close zipper is designed for repeated opening and reclosing, which is why these bags are used for products customers dip into over time. For contents that will be opened daily for months, step up to a 4 mil bag or a heavy-duty double track zipper bag for a longer-lasting closure. Do these bags come with hang holes or a write-on block?Yes. Clear Line single track seal top bags are stocked in three variations: plain, with a round hang hole for peg and slat-wall retail display, and with a white write-on block for labeling contents, lot numbers or dates in pen or marker. Both options are available in 2 mil and 4 mil. Why Buy LK Packaging Clear Line Bags?
- LK Quality: Manufactured by LK Packaging (formerly Elkay Plastics), a trusted leader in poly bags
- Crystal Clarity: Superior LDPE resin provides excellent product visibility
- Dual Security: Heat seal + zipper = tamper evidence + convenience
- Versatile Applications: Retail, food service, industrial, healthcare-approved uses
- Wholesale Pricing: Bulk case quantities at competitive rates
- Fast Shipping: In-stock sizes ship same day or next business day
Need help choosing the right seal top bag? Contact our packaging experts for size recommendations and volume pricing.
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