Marine Flotation FOam

If you’re looking for marine-grade foam that meets depth and buoyancy requirements while providing rigidity and strength, be sure to use Natural Polymers’ buoyancy foams. Our full selection of marine foams exceeds industry standards for resisting pressure and water penetration. Our boat foam products harden into shape with minimal reduction, resist mold and mildew, and have superior resilience and impact recovery. Whatever density you need, we are ready to help. As one of the foremost custom manufacturers of marine foams for the boat industry, we can create the weight and density your project needs. Most importantly, all our products have a Global Warming Potential (GWP) that’s lower than 99.8% of traditional blowing agents. Natural Polymers’ foams are truly the most innovative and eco-friendly foams on the market. 

✓  Both spray and pour marine foam formulations

✓ Great processing characteristics

✓  High bio-renewable content 

✓ Consistent density distribution for proper flotation 

✓ Easy on equipment 

✓ Lower exothermic reaction for great lift thickness

Unsure what marine or flotation foam products you need, or the quantity your project requires? Let our experts help you determine the highest-quality (and most profitable!) solution for your marine pour foam or spray foam project. Get in touch with our team today to find the highest yielding, easiest to use products!

 

Recommended Uses

  • General-purpose pour applications 
  • Buoys
  • Boats, ships
  • Submarine applications
  • Docks
  • Set design
  • Water features
  • Molding 
  • Floating devices
 

Natural-Therm® Flotation Foam Specs

Natural-Therm® 2250 high-yield, expanding marine foams have exceptional physical properties. Their high-yield and ease of use make them great for filling voids. The chart below shows the relationship between applied pass thickness, polyurethane foam-in-place density, and compressive strength. All other physical properties will be affected by the in-place density of the polyurethane foam.

PROVEN PROPERTIES, PROVEN RESULTS

Typical Component Properties

  • Viscosity @ 25°C, cps
  • Specific Gravity @ 25°C, g/ml
  • Mixing Ratio, % by volume

Typical Reactivity Properties

Spray Reactivity@120°F
  • Cream Time, seconds……….38-48
  • Tack Free Time, seconds……120-130
A Component polymeric MDI Natural-Therm 2050, B Component, polyol blend
200 300
1.24 1.16
50 50

Typical Processing Parameters

Hydraulic Pressure, psi 500
Spray Pressure, psi
Hose Temperature 120°F
Static, A/B 900-1200
Preheat Temperature
120°F Dynamic, A/B 700-1000

Typical Foam Properties

Compressive Strength, 10% deflection, ASTM D-1621, parallel, psi 28
Initial K-Factor*, ASTM C-518, BTU in/hr ft2 °F 0.140
Tensile Strength, ASTM D-1623, psi 28
Water Absorption, ASTM D-2842, lb/ft2 (% by volume) 0125-0.155
Tumbling Friability, ASTM C-421 % loss 1.0-3.5
Closed Cell Content, ASTM D-2856, % >97.5
Dimensional Stability, ASTMD-2126, % volume change:
  @ -20°F @ 158°F @ 100°F/100% R.H.
7 Days 0.4 0.9 1.6
14 Days 0.7 1.13 2.0
28 Days 1.00 1.70 2.70
This chart demonstrates the typical relationship between applied pass thickness, polyurethane foam-in-place density, and compressive strength. Accordingly, all other physical properties will be affected by the in-place density of the polyurethane foam.
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Rate of Rise Data at 50°F
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Choice criteria 1 [s] 50.0% R 20.9
Choice criteria 2 [s] 80.0% R 25.5
start time [s] 15.0 % v 14.5
rise time [s] 98.0% R 36.2
max. velocity [mm/s]   15.6
max. velocity at   18.7
max. temperature [C]   122.3

READY FOR GREAT RESULTS?

Choose our marine spray or pour foam products today and get better results tomorrow. View our products to determine which Natural Polymers buoyancy foam you need.