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White Tyvek expansion envelope, 12 by 16 by 2 inches, peel-and-seal flap

Quality Park

Quality Park R4492 Tyvek Expansion Envelope 12 x 16 x 2 White 18lb 100/Carton

SKU CH-552R-4AZKY MPN R4492

Tyvek expansion envelopes measuring 12 x 16 x 2 inches hold bulky items securely with a peel-and-seal Flap-Stik closure, supplied in a 100-count carton

  • Product typeBusiness Envelopes
  • Product colorWhite
  • Tyvek material resists rips, tears and punctures
  • Flap-Stik peel-and-seal closure speeds up packing
  • Expansion depth of 2 handles bulky documents
  • Water-resistant and moisture-resistant construction protects contents
  • Carton of 100 envelopes supplies high-volume mailing

White Tyvek expansion mailer

The Quality Park R4492 is a white expansion envelope built from 18 lb DuPont Tyvek. It measures 12 by 16 inches with a 2 inch gusset so bulky documents sit flat. The Flap-Stik peel-and-seal closure secures contents without tape or moisture. Each carton contains 100 mailers.

Offices sending thick files, not heavy goods

This mailer suits offices that ship catalogues, contracts or sample sets up to the 2 inch expansion limit. It is not for shippers who need rigid crush protection or parcels that exceed the envelope's flexible structure. Buyers sending heavy hardware should choose a corrugated box instead.

2 inch gusset depth

The 2 inch expansion depth is the single measure that decides fit. If your stack exceeds that thickness the envelope will not seal. If it fits, the Tyvek shell resists rips, punctures and water while the self-seal flap closes in seconds.

How it compares

Measured against everything we stock in Document Envelopes & Pouches, at today’s prices. Recalculated every night.

Price $200.99
Pricier than about 93% of the 638 comparable items (median $61.99).

Specifications

Product
Brand nameQuality Park
Model nameR4492
Product typeBusiness Envelopes
Product colorWhite
Size & build
Shipping weight3.40 kg
Package size406 × 345 × 140 mm

Questions about this item

How do I seal the Flap-Stik closure on the 12 x 16 envelope without leaving gaps?

Peel the release liner completely off the adhesive strip, press the flap down firmly across its full width, then run your finger along the seal to confirm contact; the expansion gusset must stay flat while sealing.

When should I replace a Tyvek mailer from the 100-count carton if it gets wet?

The DuPont Tyvek material is water-resistant and moisture-resistant, so surface dampness does not degrade it; replace only if the envelope is punctured, torn, or the Flap-Stik adhesive no longer bonds.

What is the first limitation when mailing bulky items in the 2-inch expansion envelope?

The envelope is designed for bulky items which are not too heavy; exceeding the structural capacity of the 18lb Tyvek or overstuffing the 2-inch gusset risks seam stress before the Flap-Stik seal fails.

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