How to Choose Best Sealing Solution for Hassle-Free Mailing

If you’ve ever run a busy mailroom or even just sent out stacks of invoices every week, you know how much time a postage meter saves. But here’s the part many people overlook: your mailing system is only as good as the sealing solution you use.

When envelopes don’t seal properly, flaps pop open, adhesive gets messy, and your machine can clog or jam. The right sealing fluid prevents all that—it keeps your meter’s moistening system clean, ensures every envelope is sealed neatly, and saves you from frustrating downtime.

So, how do you know which type and size of solution to buy? Let’s break it down like you’re talking to a fellow office manager over coffee.

Starting Small – Everyday Office Needs

Not every business is churning out thousands of letters. If you only send a few batches each week, you don’t need to overstock. A Sealing Solution 4 oz. (IDS-4 Blue) Flip Top is perfect—it’s ready to use, easy to store in a desk drawer, and lasts surprisingly long for small mail runs.

Some people prefer a dab-and-go style. That’s where the Sealing Solution 4 oz Dabber Bottle (IDS-4D 601-7 Blue) shines. No spills, no waste—just a neat seal every time.

Stretching Your Budget with Concentrates

When you’re mailing more often but still watching costs, concentrated solutions make sense. Think of it as buying coffee beans instead of single cups—it saves money in the long run.

A single vial of Sealing Solution 4 Oz. Blue Concentrate (IDS-4C) turns into a full gallon of sealing fluid once diluted. That’s months of mailing from something that fits in your palm.
If you hate guessing measurements, go for the Sealing Solution 4 Oz. Blue Concentrate + Empty Gallon Jug (IDS-4C1). It includes a jug—just add water, shake, and you’re done.
When Your Mailroom Starts Getting Busy

As your outgoing mail grows, those little bottles won’t keep up. That’s when stepping up in size saves you from constant refills.

The Sealing Solution 16 oz. (IDS-16 Blue) and Sealing Solution 32 oz. (IDS-32 Blue) bottles give you more capacity without committing to a full gallon.
Medium-sized businesses love the Sealing Solution Half Gallon (IDS-64 Blue) because it cuts refill frequency in half.
If you’re sealing stacks of envelopes daily, the Sealing Solution Gallon (IDS-128 Blue) becomes the workhorse of your mailroom—big enough to last but still easy to handle.

Making Refills Easier

sealing solution Handling gallons can get messy. That’s why many offices add a Sealing Solution Pump to the mix. It’s a simple tool that saves time and keeps fluid from spilling everywhere.

If you’d rather not deal with separate pieces, the Sealing Solution Gallon with Pump (IDS-128 Blue) comes ready to go—no extra setup needed.

Big Mailrooms Need Big Solutions

Once you’re in the territory of bulk mailers, thinking in ounces no longer makes sense.

The Sealing Solution 5 Gallons (IDS-640 Blue) is like buying in warehouse style—it’s cost-effective and means fewer reorder headaches.
For industrial-scale operations, nothing beats the Sealing Solution 55 Gallons (607-0). Imagine not worrying about sealing fluid for months. Pair it with the Sealing Solution 55Gallon-Pump (607-9) and your mailroom staff can refill machines quickly and cleanly.

Choosing the Right Size Without Overbuying

Here’s a quick way to figure it out:

Under 500 envelopes/month: 4 oz or dabber bottle.
500–2,000 envelopes/month: Quart or half-gallon.
2,000–5,000 envelopes/month: Gallon size.
Mass mailers: 5–55 gallons.

Buying the right size matters. Too small and you’re refilling constantly. Too big and you risk old solution sitting unused. The goal is to match your volume so every drop is fresh and your postage meter runs flawlessly.

Why Quality Sealing Solution Saves You Money

It’s tempting to cut corners with water or off-brand solutions. But what usually happens? Sticky messes, poorly sealed envelopes, and worst of all—clogged postage meters that cost a fortune to repair.

Label Supply Mart’s solutions are designed for compatibility, clean application, and long-term machine health. Whether you’re running a home office or a corporate mail center, using the right solution keeps your equipment working smoothly and your outgoing mail looking professional.