Construction Additives
Defoamer · Foam Control Additive

FOAMSTAB

Reduces bubbles and pinholes forming during mixing, application, and cure, so epoxy and PU flooring systems cure through to a clean, void-free finish.

Foam Control Additives
AppearancePale liquid
ChemistryModified polysiloxane
CompatibilityEpoxy · PU · PMMA
Typical dosage0.1 – 0.5%
01

How FOAMSTAB works

STEP 1 — INCOMPATIBILITY

Disperses as fine droplets

FOAMSTAB disperses through the resin as tiny, deliberately incompatible droplets that seek out air-liquid interfaces.

STEP 2 — FILM RUPTURE

Ruptures the bubble wall

At the bubble surface, the defoamer droplet locally lowers the film's elasticity, causing the thin liquid wall to rupture and the bubble to collapse.

STEP 3 — CLEAN CURE

Air escapes before gelation

Released air escapes the film before the resin gels, preventing bubbles and pinholes from being locked into the cured surface.

02

Technical Specifications

Property
Typical value
Product
FOAMSTAB — Foam Control Additive
Function
Defoamer / air release additive
Appearance
Pale, low-viscosity liquid
Chemistry
Modified polysiloxane / mineral oil blend
Recommended dosage
0.1 – 0.5% on total formulation weight
Compatible resins
Epoxy, polyurethane, PMMA, polyaspartic
Key benefit
Reduces pinholes, bubbles, and cratering
Shelf life
12 months, unopened, cool storage
Packaging
1 kg · 5 kg · 25 kg pail
03

Application Systems

SELF-LEVELLING

Self-levelling epoxy screeds

Prevents pinholing across thick, poured floor sections.

PRIMERS

Porous concrete primers

Releases air pulled from the substrate during application.

PU FLOORING

Polyurethane flooring systems

Controls foam generated during fast-reacting PU mixing.

TOPCOATS

Clear & decorative topcoats

Delivers a clean, defect-free cosmetic finish.

04

Handling & Storage

Handling & Storage

Storage temperature 5°C – 30°C
Storage condition Sealed container
Mixing Add during resin blending, low-shear
Overdosing risk Excess can cause surface craters

Safety & Documentation

Compatibility Most epoxy & PU resin systems
Personal protection See safety data sheet
Transport classification See SDS
Documentation TDS & SDS available on request
Request a sample or the full technical data sheet

Our team can advise on the right grade for your stone type and exposure.

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support@geoconproducts.com