Veteran-Owned · BBB A+ · Experts Since 1991
Envelope sealers close and seal outgoing mail at speed without you licking a single flap, while envelope openers slit incoming mail cleanly for scanning or manual processing. AFM stocks new and refurbished envelope sealers and openers, including AFM’s own AFM60S, AFM80S, and AFM300S alongside EFS, Mercure/Secap, Omation, Formax, and RENA models. We ship nationwide and back every machine with phone support from our own technicians. Below the machines: our plain-English guide to choosing a sealer or opener, and answers to the questions we hear most.
Showing all 11 resultsSorted by price: low to high
RENA ES-450 desktop automatic envelope flap sealer for A5 through 10×13 envelopes, up to 10,000-12,000 per hour at 300 ft/min belt speed. $5,495, in stock — only 3 units exist under this name. SuppliesForMailers.com gift certificate included.
The Formax FD 430 Envelope Sealer moistens and seals envelopes in a single pass at up to 18,000 per hour, using a durable rubber moistening roller instead of sponges or glue sticks.
Formax FD 442 low-volume envelope opener processes up to 200 envelopes per minute, mixed mail from #10s to flats, with no scraps or damaged contents. Includes free ground shipping, a 180-day defect warranty, and a $60 SuppliesForMailers.com gift certificate.
Never hand-seal envelopes one at a time again. Place a stack in the feeder, switch it on, and the refurbished AFM60S does the rest. Professionally refurbished and job-tested by our technicians. Buy online and get $44.80 in free sealing supplies — two 1-gallon packets of sealing fluid powder plus a $20 SuppliesForMailers.com gift certificate.
The next step up from the AFM60S – faster sealing for bigger stacks. Place envelopes in the machine, switch it on, done. Professionally refurbished and job-tested. Buy online and get $44.80 in free sealing supplies — two 1-gallon packets of sealing fluid powder plus a $20 SuppliesForMailers.com gift certificate.
Formax FD 452 envelope opener processes up to 300 envelopes per minute in mixed sizes from #10s to flats with no pre-sorting. Includes free ground shipping, a 180-day defect warranty, and a $140 SuppliesForMailers.com gift certificate.
The Postmatic EFS Pro is a compact, portable envelope sealer that moistens and seals filled envelope flaps at up to 10,000-12,000 per hour — including tricky square invitation flaps — from A5 up to 10×13.
Formax FD 432 envelope sealer closes and seals up to 18,000 envelopes per hour, handling pieces up to 13in x 15in and 15mm thick. Includes a 180-day defect warranty, 10% off an extended warranty, and an $860 SuppliesForMailers.com gift certificate.
The AFM300S is a durable, high-speed envelope sealer — a Swiss-built machine that seals all common formats from C6/5 to C4 at up to 300 envelopes per minute with no manual flap handling.
The Omation Model 2112 Envelopener is a compact letter opener that mills a fine trim off envelope edges at up to 400 per minute, protecting contents with a soft, feathered cut.
The Mercure / Secap 720 is a Swiss-built conveyor-fed envelope sealer that seals all common formats from #10 to C4 Pocket at up to 300 per minute, with hands-free infrared start/stop.
The one deciding spec is direction of mail flow: sealers close outgoing envelopes, openers slit incoming envelopes for processing. They solve opposite problems, so start by confirming which side of your mail operation actually needs the machine.
For sealers, match throughput (feet or envelopes per minute) to your outgoing volume and check moisture-sealing versus pressure-sensitive flap compatibility with your envelope stock. For openers, confirm the cut style and feed width match the envelope sizes you actually receive.
New and refurbished units are both represented here, including our own in-house AFM60S, AFM80S, and AFM300S sealers — refurbished units cost less up front and suit lower-volume or backup roles well.
We stock envelope sealers and openers from EFS, Mercure/Secap, Omation, Formax, and RENA, plus our own house-brand AFM60S, AFM80S, and AFM300S.
What's the difference between an envelope sealer and an opener?
A sealer closes outgoing mail without licking flaps by hand; an opener slits incoming envelopes cleanly so the contents can be pulled out and processed. They handle opposite ends of your mail flow.
How fast do envelope sealers run?
Speeds vary by model, from lower-volume desktop units up to machines rated for several hundred feet per minute — tell us your daily outgoing volume and we'll match you honestly.
What's the difference between the AFM60S, AFM80S, and AFM300S?
They're our own house-brand sealers at different speed and price points, refurbished in-house; call us and we'll walk through which tier fits your volume.
Can an envelope opener damage the contents inside?
A properly adjusted opener set to the right envelope thickness slits only the flap edge; if you're handling delicate contents, tell us and we'll confirm the right cut depth and feed settings.
Do sealers work with any envelope stock?
Not always — moisture-sealed and pressure-sensitive flap envelopes need different sealing methods, so confirm your envelope stock matches the machine's sealing method before you buy.
