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Bostik Seal 'N' Flex One P390 sausage pack, low modulus polyurethane sealant for ±50% expansion joint movement in precast ...
Bostik Seal 'N' Flex One P390 sausage pack, low modulus polyurethane sealant for ±50% expansion joint movement in precast ...

Bostik Seal 'N' Flex® FC P577

600ml sausage Bostik Seal 'N' Flex FC P577 fast-cure, high-modulus polyurethane sealant for specified construction and trafficable joints; ±25% movement.

Vendor: Bostik
SKU: 170500062-PACK20
Availability: Out Of Stock
$308.52
$308.52
Prices do not include GST

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This item is supplied to order and is not confirmed as in stock at any store. For availability before visiting, email contact@adheseal.com.au.

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Description  

Bostik Seal 'N' Flex FC P577 is a one-component, high-modulus, fast-curing polyurethane sealant for construction, movement and trafficable joints. This product is supplied in 600ml sausage format. Bostik's official technical data sheet specifies ±25% movement capability; it is not Seal 'N' Flex One P390.

Product highlights

  • Fast-curing, non-slumping polyurethane formulation
  • High bond strength and adhesion to suitable construction materials
  • ±25% joint movement capability
  • Suitable for specified trafficable, industrial and construction joints
  • Made in Australia

Where to use

Specified floor and concrete joints, trafficable areas, construction expansion joints and other compatible building substrates. Choose suitable primers and joint dimensions according to Bostik's current FC P577 technical data sheet.

Technical documents and precautions

Refer to the official Bostik Seal 'N' Flex FC P577 product page for the current TDS and SDS. Follow the manufacturer instructions for substrate preparation, priming, joint geometry, handling and safety. Product identification is based on manufacturer codes recorded against the Adheseal SKUs; current cartons should be checked if there has been a supplier substitution.

Common Questions  

Is this the same as Seal 'N' Flex One P390? No. FC P577 is Bostik's high-modulus fast-cure product with ±25% movement. One P390 is a separate formulation.

Where can I check specifications? See the linked Bostik FC P577 TDS and the current SDS on Bostik's official product page.

Uses & Benefits  
Bostik Seal 'N' Flex FC P577 is a high-modulus, fast-cure polyurethane joint sealant with ±25% movement, high bond strength, a non-slumping formulation and suitability for specified trafficable concrete joints. Follow the current Bostik TDS.
How To Apply  
Apply to clean and suitably prepared joints using primers and joint geometry specified in the current Bostik FC P577 TDS. Confirm suitability for trafficable or chemical-exposure applications before use.
Limitations and Safety Info  
Select according to the current Bostik FC P577 TDS and SDS. Do not substitute Seal 'N' Flex One P390 or One Plus P590 specifications, movement ratings or safety documents.
Suitable Substrates  
  • Insitu concrete, render, precast and tilt-up panels.
  • Brickwork and blockwork.
  • Fibre cement sheet, GRC and plasterboard.
  • Aluminium windows, fibreglass and specialty panels.
  • u-PVC, brass, copper and stainless steel.

Bostik Seal 'N' Flex® FC P577 Physical Properties

Bostik Seal 'N' Flex® FC P577 Physical Properties
Property Value
Product Type One-component fast-cure polyurethane sealant
Movement Capability ±25%
Cure Rate 2.5–3 mm/24 h (manufacturer guidance)
Product Code FC P577
Modulus High
Applications Specified construction, concrete and trafficable joints
Source Bostik FC P577 TDS 02/10/2025

Bostik Seal 'N' Flex® FC P577 - Use Cases

Here are some common examples on where Bostik Seal 'N' Flex® FC P577 used by our customers.

Civil Construction

High movement expansion joints

Sealing dynamic joints in concrete, masonry, or precast panels requiring flexibility against structural movement.

Its low modulus and 50% movement capability prevent premature cracking in constantly flexing building elements.

  • ±50% joint movement
  • Class-A polyurethane sealant
  • 30 Shore A hardness
  • Max 50mm joint width

Waterproofing

Potable water tank joints

Sealing joints within concrete tanks or structures designed to contain drinking water, requiring compliance.

AS4020 approval ensures safe contact with potable water, while ±50% movement accommodates structural shifts without compromising the seal.

  • AS4020 Potable Water approved
  • ±50% joint movement
  • Shore A hardness 30
  • Elongation at break > 900%

Glass & Aluminium

Facade panel perimeter sealing

Sealing perimeters of aluminium window frames, GRC, or fibreglass facade panels subjected to thermal expansion.

Its Class-A, low modulus formulation prevents sealant failure from thermal cycling and differential movement between facade elements.

  • Class A polyurethane
  • ±50% joint movement
  • Aluminium window use
  • Service temperature -40 to 75°C

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