Swift®prime 4956 FL is a solvent-based adhesion promoter. It is used to pre-treat PVC, fiberglass, or aluminum window profiles prior to wrapping with Swift®lock 4780. When you manufacture window profiles that will be used in cold, moderate, or hot and humid climates, you can rely on the high-quality performance of Swift®lock 4780 and Swift®prime 4956 FL.

Product Type: Primer, Solventborne Coating

Application Area: Doors, Panels, Profile Wrapping, Window Frames, Windows

Compatible Substrates & Surfaces: Aluminum, Composites, Fiberglass, Metal, Polyvinyl Chloride (PVC), Wood

Features: Excellent Productivity, Fast Curing, Fast Drying

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Identification & Functionality

Features & Benefits

Applications & Uses

Cure Method
Usage Instruction

Swift® prime 4956 FL is a primer for Swift®lock 4780 and Swift®lock 4790.


Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)1.32g/cm³-

Technical Details & Test Data

Viscosity Curve

Swift® prime 4956 FL - Viscosity Curve

Safety & Health

Safety Information

Use only in equipment intended for reactive hot melts. Use with local exhaust ventilation to remove vapors anywhere heated product is exposed to air including adhesive un-loaders, premelters, and application areas. Local exhaust ventilation may be required to maintain exposures at safe levels.

Packaging & Availability

Regional Availability
  • Africa
  • Europe (Excluding Russia)
  • India
  • Middle East
  • North America

Storage & Handling

Shelf Life
12 Months
Storage Condition

To ensure maximum stability, product should be stored in the original closed container in a clean and dry interior location capable of maintaining a constant temperature between 50°F and 90°F.