Masonry Liner vs. Coatings Liner: Which 5-Gallon Bucket Liner Do You Actually Need?

If you've ever tried to clean hardened concrete out of a 5-gallon bucket, you already know the problem. And if you've ever had a liner fail mid-pour on an epoxy job, you know that one too.

Think of a bucket liner as protection for your bucket. Same idea as any other protective layer — you use it once, toss it, and your bucket stays clean and ready for the next job. Raw mixing without one is just asking for a bad time.

That's why we make two: the 5GBL Pro® Masonry Liner (80g) and the 5GBL Pro® Coatings Liner (60g). Same bucket. Same concept. Very different jobs.

 

What Does the "g" Number Actually Mean?

The "g" stands for grams per square meter (GSM) — a measure of material density and thickness. Think contractor-grade trash bag vs. a standard kitchen bag. Same shape, very different strength.

• 60g = optimized for lighter, fluid materials like paint, epoxy, and resin
• 80g = ~33% more material, engineered for heavy, abrasive cement-based mixes

More grams = more material = more resistance to stress, weight, and abrasion.

The 60G Coatings Liner — Built for Fluid Materials

Best for: Epoxy · Resin · Paint · Coatings · Stains · Sealers

The Original 60G Coatings Liner was designed around the needs of painters, epoxy applicators, and coatings contractors. These materials are fluid, relatively lightweight, and don't put extreme mechanical stress on the liner.

Why it works for coatings:

• Smooth interior for clean pours and easy residual scraping
• Flexible enough to conform tightly to bucket walls
• Holds up against solvents and chemical-based coatings
• Peel and toss — no soaking, no scraping the bucket
• Keeps buckets reusable across jobs and crews

Who uses it: Painters, flooring contractors, waterproofing crews, epoxy garage floor applicators, and anyone mixing or storing fluid coatings on the job.

The 80G Masonry Liner — Built for Cement-Based Mixes

Best for: Concrete · Mortar · Thinset · Grout · Other cement-based applications

Cement-based materials are a different animal. They're heavy, abrasive, and they harden — fast. A lighter liner under that kind of stress can stretch, thin out, or fail at the worst moment.

Why it works for masonry:

• Heavier 80g construction handles the weight and abrasion of cement-based mixes
• Resists mechanical stress from mixing paddles and drill mixing
• Prevents hardened material from bonding to the bucket interior
• Peel and toss — even after concrete or mortar sets up inside
• Extends bucket life significantly on masonry-heavy job sites

Who uses it: Tile setters, masons, concrete contractors, general contractors, and any crew regularly mixing thinset, mortar, or grout on site.

Side-by-Side: Which One Do You Need?

	60G Coatings Liner	80G Masonry Liner
Material weight	60 GSM	80 GSM
Best for	Epoxy, paint, resin, coatings	Concrete, mortar, thinset, grout
Mixing paddle use	Light to moderate	Heavy-duty
Cleanup method	Peel & toss	Peel & toss
Bucket compatibility	Standard U.S. 5-gallon	Standard U.S. 5-gallon

Can You Use One for Both Jobs?

Technically yes — but you shouldn't. Using the 60G for heavy masonry risks liner stress and potential failure mid-mix. Using the 80G for coatings works fine but is overkill.

The right call: keep both on the truck. Most professional crews working mixed trades do exactly that.

Why This Actually Matters Beyond Cleanup

Here's the part most people don't think about.

Every time you mix without a liner and ruin a bucket, you're throwing away an entire bucket — hundreds of grams of plastic — just to avoid a liner that uses a fraction of that. A liner uses roughly 10–17% as much plastic as a bucket. That's about 85–90% less plastic per mix.

For a crew avoiding ~2,000 bucket replacements a year, that's roughly 1.8 tons of plastic kept out of the waste stream — while using the same buckets over and over.

We can't eliminate plastic entirely. But we can reduce it significantly. That's the whole point. → Read our full sustainability story

One More Thing: Don't Forget Your Mixing Cups

For smaller batch work — thinset touch-ups, grout fills, epoxy kits — our 5-quart mixing containers are built for the same workflow. Measure, mix, toss. No cleanup, no cross-contamination between materials.

Mixing coatings with a drill? Our mixing rods are tested and approved for use with the Coatings Liner. The right liner, the right mixer, the right result → Shop Mixing Cups & Rods

Bottom Line

• Mixing paint, epoxy, resin, or coatings? → 60G Coatings Liner
• Mixing concrete, mortar, thinset, or grout? → 80G Masonry Liner
• Working both trades? → Keep both on the truck

Shop 5GBL Pro® Bucket Liners →