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Adheseal Everflex PU-240 310ml polyurethane sealant cartridge for structural bonding & high-movement joint sealing.
Adheseal Everflex PU-240 310ml polyurethane sealant cartridge for structural bonding & high-movement joint sealing.

Everflex PU240 Polyurethane Adhesive and Sealant

Fast-curing polyurethane adhesive and sealant in a 300 mL cartridge for construction joints, cladding and marine maintenance. ±25% movement; sandable and paintable once cured.

Vendor: Adheseal
SKU: PU240WH/CTG
Availability: In Stock
$11.74
$11.74
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Description  

Everflex PU240 is a fast-curing, single-component polyurethane adhesive and sealant for building maintenance, construction joints and marine repairs. Supplied in a convenient 300 mL cartridge, it creates a tough yet flexible bond or joint seal on suitably prepared construction materials, including masonry, timber, metal and compatible painted surfaces.

Choose PU240 when you need a versatile polyurethane for smaller sealing and bonding jobs without moving to a full sausage-gun system. Its moisture-cured seal accommodates ±25% joint movement, resists vibration and mechanical wear, and can be painted or sanded after curing where the finish and coating are compatible.

Where Everflex PU240 works

  • Pavement and concrete joints: sealing suitable movement joints in driveways, car parks and concrete surrounds.
  • Cladding and window perimeters: flexible sealing of compatible metal, masonry and frame junctions.
  • Marine and vehicle maintenance: sealing seams and recaulking suitable marine teak flooring; the cured product is also specified for certain below-waterline applications.
  • Fabrication: seam sealing and bonding compatible parts exposed to movement or vibration.

Choosing PU240 over another polyurethane

PU240 is a practical cartridge-format choice for versatile construction and maintenance sealing, with a cured Shore A hardness of approximately 35. For a firmer, high-modulus anti-pick joint in public areas, consider Adheseal PU50. For a softer window-perimeter seal, compare PU15.

Before you apply

Apply to sound, clean, dry surfaces and select the correct joint depth and backing rod to prevent three-sided adhesion. Priming or an adhesion test may be needed on demanding substrates. Allow full cure before immersion or demanding service; moisture and temperature affect cure speed.

Do not use PU240 for structural glazing, aquariums, mirror bonding or chlorinated pool joints. Avoid bitumen, EPDM, natural rubber and materials that release oils or plasticisers. Test natural stone for staining and confirm compatibility with sensitive coatings.

Common Questions  

How much movement can PU240 accommodate?
It is rated for ±25% joint movement.

Can PU240 be used below the waterline?
Yes, once fully cured it is suitable for continuous submersion in below-waterline marine applications.

Can PU240 be painted?
Yes. Once cured it can be sanded and painted with compatible acrylic, oil or rubber-based coatings.

Can PU240 be used for structural glazing?
No. It is not suitable for structural glazing.

Uses & Benefits  
High-modulus polyurethane adhesive and sealant for demanding joints and bonded assemblies exposed to vibration, abrasion and water. Accommodates ±25% joint movement. Service temperature range is -40°C to +90°C after cure. Once fully cured it is suitable for continuous submersion in below-waterline marine applications. The cured product can be sanded and painted with compatible acrylic, oil or rubber-based coatings.
How To Apply  
Apply to clean, dry substrates free from grease, release agents and curing compounds. Concrete must cure for at least 28 days. Maintain a 2:1 width-to-depth ratio. Internal joints require a minimum 5mm width and depth; external joints require at least 12mm width. For joints deeper than 10mm use open-cell backing rod sized about 25% larger than the joint width. For aluminium, stainless steel, PVC and powder-coated surfaces, lightly abrade, clean and use Adheseal 50A. Allow 30 minutes to 2 hours before sealing. For concrete, render and brick use Everflex Supaprime and allow 30 minutes to 2 hours. Apply between 5°C and 40°C. Tool sealant within 5 minutes. For adhesive use, apply a triangular bead and compress to at least 2mm.
Limitations and Safety Info  
Do not use in totally confined spaces. Do not use for structural glazing or mirror bonding. Do not use on bituminous surfaces, EPDM rubber, or substrates that leach oils, plasticisers or solvents. Do not use in aquariums or internal swimming pools where chlorine exceeds 5ppm. Test copper and brass for possible discolouration, and stain-test marble and granite before use. Do not apply where active substrate moisture-vapour transmission can cause bubbling. Keep uncured sealant away from cleaning agents, solvents and alcohol.
Suitable Substrates  
  • Concrete, brick, stone, porcelain, aerated concrete and cement-based renders.
  • Aluminium, anodised aluminium, stainless steel, galvanised steel and powder-coated metals.
  • Timber, PVC, acrylic-painted surfaces and fibreglass.
  • Natural rubber and compatible waterproof membranes.

Everflex PU240 Polyurethane Adhesive and Sealant Physical Properties

Everflex PU240 Polyurethane Adhesive and Sealant Physical Properties
Property Value
Curing System Moisture Cure
Shore A Hardness 35 (ISO 868)
Pot Life 20 min @23ºC & 65% RH
Skin Time 30 min @23ºC & 65% RH
Cure Rate 4 mm
Application Temperature 5ºC to 35ºC
Service Temperature -40ºC to +90ºC
Chemical Resistance Excellent to water, detergent solutions, diluted acids & alkalis, petrol and oil for short periods
Consistency Paste
Movement Capability +/- 25%
Elongation 80% (ISO 8339)
UV Resistance Good (paintable)
Density 1.17 g/cm3
VOC Content 76 gm/lt (California South Coast Air Quality management rule 1168)
Shelf Life 12 months in original packaging
Storage Temperature 10ºC to 35ºC
Full Cure 4mm / 24 hrs
Storage Conditions Cool Dry between 10ºC and 35ºC

Everflex PU240 Polyurethane Adhesive and Sealant - Use Cases

Here are some common examples on where Everflex PU240 Polyurethane Adhesive and Sealant used by our customers.

Caravan & Truck

Structural component flexible bonding

When bonding lightweight components in RVs or vehicles, requiring a strong, flexible joint that resists vibration.

This high-modulus, high-strength polyurethane creates a durable, elastic bond that accommodates constant movement and vibration effectively.

  • Shore A Hardness 35
  • Movement Capability +/- 25%
  • 80% Elongation at Break
  • -40°C to +90°C service

Marine

Marine Teak Deck Re-caulking

Re-caulking or bonding teak decking on boats exposed to water, movement, and abrasion.

Its high Shore A hardness and abrasion resistance create a durable, flexible, waterproof bond that endures constant marine conditions.

  • Suitable below waterline applications
  • Shore A hardness 35 (ISO 868)
  • Movement capability ±25%
  • Excellent chemical resistance to water

Sheet Metal

Factory Metal Cladding Bonding

Bonding metal cladding, display signs, or components in factories or industrial environments with movement.

Its high modulus and non-corrosive properties ensure durable, resilient bonds for construction materials subject to vibration and movement.

  • Non-corrosive to galvanized steel
  • Shore A hardness 35 (ISO 868)
  • Paintable with acrylic, oil paints
  • Movement capability ±25%

Civil Construction

Trafficable pavement and driveway joints

Sealing horizontal joints in car parks or driveways needing a tough, pick-resistant surface for light traffic.

Its high Shore A hardness and abrasion resistance create a durable, tear-resistant seal that withstands traffic and environmental exposure.

  • Shore A Hardness 35
  • Chemical resistance to petrol
  • Excellent abrasion resistance
  • Resists pick and tear

Marine

Marine deck and seam sealing

Re-caulking teak floors or sealing seams on boats, requiring a waterproof and vibration-resistant bond for below waterline.

Cures to a tough, waterproof seal suitable for below-waterline applications, resisting vibration and common marine chemicals.

  • Suitable below waterline
  • Excellent water resistance
  • Withstands vibration
  • Paintable with acrylics

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