{"id":35148,"date":"2026-01-12T16:21:09","date_gmt":"2026-01-12T15:21:09","guid":{"rendered":"https:\/\/www.finres-sa.com\/?post_type=product&p=35148"},"modified":"2026-04-13T16:50:01","modified_gmt":"2026-04-13T14:50:01","slug":"expanding-polyurethane-foam-professional-pu-foam-for-molding-filling-and-insulation","status":"publish","type":"product","link":"https:\/\/www.finres-sa.com\/en\/product\/expanding-polyurethane-foam-professional-pu-foam-for-molding-filling-and-insulation\/","title":{"rendered":"Polyurethane Expanding Foam \u2013 Professional PU Foam for Molding, Filling and Insulation"},"content":{"rendered":"\t\t
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PUR foams are two-component, closed-cell rigid foam products, CFC-free, designed for technical and structural applications. They provide good thermal and acoustic insulation, both indoors and outdoors. <\/p>

Developed for assembly, filling, insulation, and certain structural adhesive applications, these foams offer controlled expansion, excellent dimensional stability, and a uniform density, ideal for creating solid, lightweight, and perfectly defined volumes.<\/p>

They feature strong adhesion to many substrates (wood, metal, stone, etc.) and are easy to use, for both DIY and professional applications.<\/p>

Once cured, the foam offers high rigidity and excellent mechanical strength, suitable for making cores, reinforcements, prototypes, and technical parts. It is also resistant to water, seawater, hydrocarbons, and certain diluted chemical agents. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Use as adhesive and insulation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PUR foams can be used for bonding applications, particularly for assembling lightweight materials or stabilizing elements. Their controlled expansion ensures effective support while filling substrate irregularities. <\/p>

Their closed-cell structure guarantees good insulation, limiting heat loss and reducing sound transmission.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Application Instructions<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Preparation and temperature<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Stir components A and B thoroughly before use. Maintain a minimum temperature of 18\u00b0C (ideally 20\u201325\u00b0C) to ensure an optimal reaction. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Dosing and mixing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Weigh component A precisely, add component B according to the indicated ratio, then mix immediately until a homogeneous mixture is obtained. Poor mixing can affect expansion and final density. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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APPLICATION INSTRUCTIONS<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Quickly pour the mixture into the designated area or mold, without overfilling (expansion in progress).
Pouring is recommended; a spray gun is less suitable for this type of foam.
Depending on the case, using formwork or a suitable support allows for better control of the final shape.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Reaction and finishing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Observe the indicated reaction times. After full cure, the foam can be cut, sanded, or painted. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Technical specifications<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The various references (HR, H75, H101, H200) cover a wide range of applications: insulation, buoyancy, filling, prototyping, technical parts, and structural inserts.<\/p>

They feature densities between 40 and 200 kg\/m\u00b3, with a closed-cell rate of over 90%, guaranteeing mechanical performance suited to each application. Mixing ratios, expansion coefficients, and reaction times vary by reference, allowing for precise adjustment based on project needs. <\/p>

For more information, access the full technical data or download the detailed product sheet.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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<\/p><\/th>

HR<\/p><\/th>

H75<\/p><\/th>

H101<\/p><\/th>

H200<\/p><\/th><\/tr>

Recommended Applications<\/p><\/td>

  • Insulation against cold and heat.<\/p><\/li>

  • Flotation for boats.<\/p><\/li>

  • Filling for buoys and life jackets.<\/p><\/li>

  • Sound transmission reduction.<\/p><\/li><\/ul><\/td>

  • Filling hollow spaces or shapes (boats, relief volumes, etc.).<\/p><\/li>

  • Casting figures and models.<\/p><\/li>

  • Wood imitation possible<\/p><\/li><\/ul><\/td>

  • Rigid molded parts.<\/p><\/li>

  • Technical prototypes.<\/p><\/li>

  • CNC-machinable models.<\/p><\/li>

  • Orthopedic inserts.<\/p><\/li><\/ul><\/td>

  • Orthopedic forms and insoles.<\/p><\/li>

  • Rigid handles and grips.<\/p><\/li>

  • Stress-bearing filling.<\/p><\/li>

  • Structural inserts for composites.<\/p><\/li><\/ul><\/td><\/tr>

Density (kg\/m\u00b3)<\/p><\/td>

40<\/p><\/td>

75<\/p><\/td>

100<\/p><\/td>

200<\/p><\/td><\/tr>

Ratio By weight<\/p><\/td>

100 A : 120 B<\/p><\/td>

100 A : 145 B<\/p><\/td>

100 A : 115 B<\/p><\/td>

100 A : 100 B<\/p><\/td><\/tr>

Expansion coefficient<\/p><\/td>

1:25<\/p><\/td>

1:13<\/p><\/td>

1:8 to 1:10<\/p><\/td>

1:5<\/p><\/td><\/tr>

Compressive Strength (N\/mm\u00b2)<\/p><\/td>

0.27<\/p><\/td>

not specified<\/p><\/td>

1.0<\/p><\/td>

Between 1.5 and 2<\/p><\/td><\/tr>

Start Time at 20\u00b0C<\/p><\/td>

approx. 50 seconds<\/p><\/td>

60 seconds<\/p><\/td>

35 seconds<\/p><\/td>

65 seconds<\/p><\/td><\/tr>

Expansion time at 20\u00b0C<\/p><\/td>

approx. 60 seconds<\/p><\/td>

\u2014<\/p><\/td>

130 seconds<\/p><\/td>

\u2014<\/p><\/td><\/tr>

Curing Time at 20\u00b0C<\/p><\/td>

approx. 540 seconds<\/p><\/td>

\u2014<\/p><\/td>

150 seconds<\/p><\/td>

\u2014<\/p><\/td><\/tr>

Closed Cells (% vol)<\/p><\/td>

>90<\/p><\/td>

>90<\/p><\/td>

>90<\/p><\/td>

>90<\/p><\/td><\/tr>

Color<\/p><\/td>

Yellowish<\/p><\/td>

Yellowish<\/p><\/td>

Yellowish<\/p><\/td>

Yellowish<\/p><\/td><\/tr>

Storage<\/p><\/td>

Between 10\u00b0C and 25\u00b0C<\/p><\/td>

Between 10\u00b0C and 25\u00b0C<\/p><\/td>

Between 10\u00b0C and 25\u00b0C<\/p><\/td>

Between 10\u00b0C and 25\u00b0C<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Service and additional information<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Our team helps you choose the right foam for your application, whether for professional or DIY use. We help you compare references based on performance, use, and price. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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FAQ \u2013 Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\tCan you control the expansion of polyurethane foam?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Yes, expansion depends on the mixture and quantity used. It’s recommended not to completely fill the volume, as the foam continues to expand after application. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\tCan you use polyurethane foam to fill large volumes?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Yes, but it’s advisable to apply in multiple layers to better control expansion and avoid any deformation.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\tDoes polyurethane foam adhere to all surfaces?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

It adheres very well to most materials like wood, metal, or certain plastics, provided the surface is clean and dry.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\tCan you sand or cut polyurethane foam after curing?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Yes, once cured, the foam can be cut, sanded, or reworked as needed.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\tIs polyurethane foam durable over time?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Yes, once cured, polyurethane foam is stable and durable, and retains its mechanical properties long-term. However, its color may yellow over time. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t