Phenolic Microballoons container with marine epoxy mixing

Phenolic Microballoons for Marine Epoxy | UltraClear Epoxy

$25.00

Phenolic Microballoons are a lightweight, low-density filler designed specifically to mix with marine epoxy. They create a sandable, paint-ready finish ideal for fairing and filling imperfections before finishing. Compatible with UltraClear Marine Epoxy FAST and SLOW systems, these microballoons help smooth surfaces for a polished result.

Mixes well with UltraClear Marine Epoxy FAST and SLOW
Lightweight and easy to sand
Ideal for filling and fairing in marine epoxy projects
Available in 1 Quart and 1/2 Gallon sizes

Size: 1 Quart $25

1 Quart $25
1/2 Gallon $49

Product variants

Lightweight filler for marine epoxy fairing and filling.

Phenolic Microballoons for Marine Epoxy

Product Information

Exact Details and Fit

Brand: UltraClear Epoxy
Category: Protective Coatings & Sealants
Material: Phenolic microballoons designed for use with marine epoxy systems.
Dimensions: Available in 1 Quart and 1/2 Gallon sizes
Type: Protective Coatings & Sealants
Design: Protective Coatings & Sealants
Options: Size: 1 Quart $25, 1/2 Gallon $49
Variants: 1 Quart $25, 1/2 Gallon $49

What arrives

One Phenolic Microballoons for Marine Epoxy | UltraClear Epoxy product in the selected size.

Sizing options

Available Sizes

Mix phenolic microballoons with your chosen UltraClear Marine Epoxy (FAST or SLOW) to create a fairing or filleting compound.
Apply to surfaces, allow curing, then sand smooth before finishing.

1 Quart and 1/2 Gallon sizes to suit different project scales

Compatible with UltraClear Marine Epoxy FAST and SLOW systems.
Use only pigments, molds, sealers, forms, and topcoats approved or tested with this product.

Always follow the manufacturer's instructions and safety guidance.

Shipping and Returns

Shipping

Shipping rates and delivery estimates are shown at checkout.
Most orders ship in 1-5 business days depending on inventory, destination, item type, and carrier.
Multi-brand orders may arrive in separate packages.

Returns

Return requests accepted within 30 days of delivery.
Damaged, defective, incorrect, or missing items are fully supported by contacting Resin Society for coordination.
Change-of-mind returns are reviewed per supplier policies and item condition.

On the bench

Smoothing the story beneath the finish

A lighter touch

Fairing can feel like an uphill climb—heavy mixes, slow shaping, and surfaces that never quite settle.
UltraClear Phenolic Microballoons change the rhythm with a lightweight body that shapes willingly and finishes clean.
They turn gaps and ripples into a uniform base that welcomes paint.
The result is time saved on the grinder and a calmer path to a paint‑ready surface.

From rough to ready

Every lasting finish begins with what you don’t see.
These low‑density fillers pair with UltraClear Marine Epoxy FAST or SLOW, creating a sandable, consistent layer that brings edges into alignment.
Corners read sharper, curves read truer, and the final coat lands on even ground.
Fewer passes, fewer surprises, more confidence in the line.

For the hands that shape

Boat builders, repairers, and shop crews who want a dependable, lightweight fairing and filling blend that sands to a smooth, paint‑ready finish.

In practice

Blend Phenolic Microballoons with UltraClear Marine Epoxy FAST or SLOW to fair and fill before final sanding and paint.

Epoxy projects
Wood and resin work
Pour planning
Shop use

Maker Focus

UltraClear Epoxy Brand

UltraClear Epoxy focuses on epoxy systems, resin color, additives, and practical pour supplies for tables, bars, coatings, casting, and studio work.
Resin Society carries UltraClear because the line fits makers who need resin materials, pigments, and setup tools organized around real epoxy workflows.

Explore UltraClear Epoxy

Questions About Phenolic Microballoons?

Frequently Asked Questions

What is the primary use of Phenolic Microballoons?

They are a lightweight filler used to create fairing and filleting compounds that fill and smooth surfaces before finishing and paint.

Which epoxy systems are these compatible with?

They’re compatible with UltraClear Marine Epoxy FAST and SLOW systems.

How does the finish sand?

Once cured within your chosen UltraClear Marine Epoxy system, the filled areas sand easily to a smooth, paint‑ready surface.

Are they suitable for building up low spots and shaping?

Yes.
Their low density makes them well‑suited for fairing and shaping to bring surfaces into uniform plane before paint.

What size is the container shown?

Compare the listed Phenolic microballoons designed for use with marine epoxy systems, Available in 1 Quart and 1/2 Gallon sizes to suit different project scales, product photos, quantity, care notes, and delivery expectations before checkout.