Closed-Cell PU Foam – Water-Based (FY-Spray 501W)

Per Set

The FY-Spray 501W is a two-component, spray-applied, closed-cell polyurethane foam system.
Formulated with water as the blowing agent (141b-free), it is environmentally friendly and delivers superior thermal insulation, waterproofing, and fire retardancy.

This product is designed for a wide range of spray-applied thermal insulation engineering projects such as:

• Building exteriors & interiors
  
• Cold storage rooms
  
• Large-scale pipelines
  
• LNG or LPG ships 

Key Features

Eco-Friendly: Water-based, 141b-free, safe for the environment
Superior Insulation: Initial thermal conductivity ≤ 35 mW/(m·K)

Strong & Durable:

• Compressive strength ≥ 160 kPa
  
• Tensile strength ≥ 120 kPa

Dimensional Stability:

• ≤1% change @ -30℃ (48h)
  
• ≤2% change @ 80℃ (48h)

Water Absorption: ≤1%
Fire Retardant: DIN 4102-1 B2 rating 

Physical Properties

• Appearance: Pale yellow to brown viscous liquid
  
• Viscosity (25℃): 400–800 mPa·s
  
• Specific Gravity (20℃): 1.05–1.15 g/ml
  
• Storage Temperature: 10–25℃

Shelf Life: 8 months 

Recommended Mixing Ratio

• FY-Spray 501W Blend Polyols: 100 pbw
  
• Isocyanate: 100–105 pbw

Reactivity Characteristics (20℃):

• Cream time: 3–5 seconds
  
• Gel time: 10–15 seconds 

Applications

• Commercial and residential building insulation
  
• Cold chain storage (freezers, cold rooms)
  
• Industrial and marine pipelines
  
• LNG/LPG shipping insulation

Water-Based PU Foam (FY-Spray 501W) vs. Non-Water-Based PU Foam
1. Blowing Agent (Foam Expansion)

Water-Based (FY-Spray 501W):

• Uses water as the blowing agent.
  
• Reaction releases CO₂ gas, expanding the foam.
  
• Environmentally safe, no ozone depletion. 
  
• Non-Water-Based (HCFC/HFC, e.g., 141b, HFC-245fa):
  
• Uses chemical blowing agents.
  
• Some have ozone-depleting potential (ODP) and high global warming potential (GWP).
  
• Many are banned or regulated worldwide.

2. Environmental Impact

• Water-Based:
  
• Ozone-friendly
  
• Lower GWP
  
• Compliant with current global regulations (EPA, EU REACH, Montreal Protocol phase-outs).

Non-Water-Based:

• May contain restricted chemicals (e.g., 141b phased out in most regions).
  Higher environmental risk.

3. Foam Properties

Water-Based:

• Slightly higher density foam (≥45 kg/m³ for FY-501W) 
  
• Excellent dimensional stability
  
• Reliable fire retardancy (DIN 4102 B2)
  
• May have a bit slower curing speed depending on temperature/conditions.

Non-Water-Based:

• Can achieve very low thermal conductivity (slightly better insulation per inch).
  
• Sometimes easier to process in cold weather.
  
• But dimensional stability can be lower under temperature swings.

4. Health & Safety

Water-Based:

• Safer for installers (fewer harmful emissions).
  
• Reduced odor and toxicity during spraying.

Non-Water-Based:

• Fumes can be more harmful, requiring stricter PPE & ventilation.

5. Cost & Market Use

Water-Based:

• Slightly higher upfront chemical cost in some regions.
  
• Growing demand due to eco-regulations and green building standards.

Non-Water-Based:

• Historically cheaper, but regulations are limiting supply.
  
• Still used in some developing regions without strict chemical bans.

Summary

Water-Based PU (like FY-Spray 501W):
Eco-friendly, regulation-compliant, waterproof, fire-retardant, long-term solution.

Non-Water-Based PU (HCFC/HFC):
Sometimes slightly better insulation efficiency but bad for the environment and being phased out worldwide.

Manual