Fortis PA75 Polyurethane PVC & Rubber Adhesive

Fortis PA75 is a heat-activated polyurethane adhesive for flexible PVC, coated fabrics, rubber and compatible flexible materials. It provides strong initial bond strength and resistance to heat and plasticiser migration for inflatable boats, PVC truck sidings, footwear and industrial fabrication.

Information

Fortis PA75 is a solvent-based, heat-activated polyurethane adhesive for bonding flexible PVC, coated fabrics, rubber and other compatible materials. It combines strong initial bond strength with heat resistance, low staining and resistance to plasticiser migration.

Applications include PVC inflatable boats, PVC truck sidings, footwear and flexible-material fabrication. Apply to both prepared surfaces, allow to dry, then heat activate and press together. Components may be pre-coated for later heat activation and assembly.

PA75 can be used as a single-component adhesive or with PA75 Catalyst for increased heat resistance. Confirm substrate compatibility and production settings through trials before use.

Material

Polyurethane Contact Adhesive – Isocyanate-Free (1K)

Advantages

Strong adhesion to compatible flexible PVC, coated fabrics and rubber.
Excellent initial bond strength.
Very good resistance to plasticiser migration.
High heat resistance.
Low staining.
Brush, roller or suitable spray application.
Allows pre-coating before heat activation and assembly.
Optional PA75 Catalyst for increased heat resistance.

Product Application

Ensure both surfaces are clean, dry and free from contaminants. Prepare each material as directed in the Technical Data Sheet and check that preparation methods do not damage the substrate.

Apply an even coat to both surfaces and allow to dry for approximately 10–15 minutes. Heat activate the adhesive-coated surfaces to at least 55°C, then bring together and press. The TDS specifies pressing for 60 seconds at 80 PSI; confirm suitable settings for the materials and production equipment.

For increased heat resistance, add PA75 Catalyst at 5–15% by weight. The catalyst contains isocyanates; consult the relevant Safety Data Sheets before use. Test the complete bonded assembly under its intended service conditions before production.

Surfaces

FORTIS PA75 is suitable for bonding a wide range of flexible and industrial materials including:

• Plasticised PVC
• Unplasticised PVC
• Flexible PVC and vinyl
• PVC-coated fabrics
• Polyurethane-coated fabrics
• Polyurethane
• Coated fabrics
• Rubber and rubberised fabrics
• Flexible membranes
• Foam
• Leather
• Selected plastics
• Selected metals
• Laminates

Typical applications include PVC inflatable manufacture and repair, inflatable boats and dinghies, jumping castles and inflatable structures, marine components, rubber bladders, hose components, flexible membranes, coated-fabric fabrication, automotive trim, seating and general flexible-material assembly.

All surfaces must be clean, dry and free from oil, grease, dust and other contaminants. Smooth or polished surfaces may require light abrasion before bonding.

PVC and coated fabrics may be lightly abraded or solvent wiped where appropriate. Rubber should generally be abraded and cleaned before bonding. Polyurethane surfaces should be abraded and thoroughly cleaned.

Plasticiser levels, surface coatings and material formulations can vary considerably between manufacturers. Always carry out compatibility and production testing before bonding unfamiliar substrates.

For critical inflatable, pressure-retaining, hose or marine applications, test the complete bonded assembly under the intended service conditions before production use.

Specifications

Specification	Value
Drying Time Before Heat Activation	Approximately 10–15 minutes
Heat activation	Minimum 55°C
Contact drying time	Approx. 10–15 minutes
Application temperature	5–30°C
Colour	Clear / Amber
Coverage	3–5 m²/L
System	Single-component or two-component with PA75 Catalyst
Adhesive type	Heat-Activated Polyurethane

Pack Sizes

20kg, 200kg

Fortis PA75 FAQs

What is Fortis PA75 used for?

PA75 bonds compatible flexible PVC, coated fabrics, rubber and other flexible materials. Applications include PVC inflatable boats, truck sidings, footwear and industrial fabrication.

Does PA75 require heat activation?

Yes. Apply to both prepared surfaces, allow to dry for approximately 10–15 minutes, then heat activate to at least 55°C before joining and pressing.

Can PA75 bond plasticised PVC?

Yes. PA75 offers very good resistance to plasticiser migration. Test compatibility with the specific PVC formulation before use.

Does PA75 need a catalyst?

PA75 can be used alone or with 5–15% PA75 Catalyst by weight for increased heat resistance.

Is PA75 isocyanate-free?

The uncatalysed adhesive is isocyanate-free. PA75 Catalyst contains isocyanates, so the catalysed system must not be described as isocyanate-free.

Can components be coated before assembly?

Yes. Components may be pre-coated and stored for a short period before heat activation. Confirm storage and assembly conditions through production trials.

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