Name: PU Joint Foam Sealant Prepolymer PJFS-80
Brand: Coatingsink
SKU: polyurethane-foam-joint-sealant
Availability: InStock

Question 1

What NCO content does PJFS-80 have and how does it affect foam expansion?

Accepted Answer

PJFS-80 has an NCO content of 8.0–10.0%. This level balances reactivity with atmospheric moisture to achieve a controlled 3× volume expansion, yielding a closed-cell foam density of 25–35 kg/m³ for effective gap sealing without over-expansion.

Question 2

Is a fire-retardant grade of PJFS-80 available for fire-stop applications?

Accepted Answer

Yes. A halogen-free FR variant incorporating ammonium polyphosphate and expandable graphite is available on request, formulated to meet EN 1366-3 fire-stop joint requirements. Contact us for the FR grade datasheet and compliance documentation.

Question 3

How should PJFS-80 be stored to maintain shelf life?

Accepted Answer

Store in sealed drums at 5–25°C, away from moisture and direct sunlight. Shelf life is 12 months in the original unopened container. Once opened, reseal tightly under dry nitrogen and consume within 3 months to prevent premature moisture-triggered cure.

NCO Content	8.0–10.0%
Density (25°C)	1.15 g/ml
Expansion Ratio	~3×
Free Foam Density	25–35 kg/m³
Viscosity (25°C)	3,000–5,000 mPa·s

PU Joint Foam Sealant Prepolymer PJFS-80

Specifications

FAQ

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