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ARBOTHANE 1245 - Self-Levelling Polyurethane Sealant for Trafficked Floor Joints

ARBOSEAL Pro®

Arbothane 1245 is a one-part self-levelling polyurethane sealant that cures on exposure to moisture vapour to form a tough, flexible rubber seal. Designed for interior and exterior horizontal floor joints exposed to pedestrian and vehicle traffic, it delivers durable performance in warehouses, garages, factory floors, and walkways.

Specify Arbothane 1245

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Unique properties of Arbothane 1245

Arbothane 1245 flows into horizontal joints and cures to a tough, traffic-resistant rubber seal with excellent adhesion to concrete and common substrates.

  • Self-levelling formulation — flows into and fully fills horizontal joints without tooling

  • Tough, flexible rubber seal — withstands pedestrian and vehicle traffic loads

  • Excellent adhesion to concrete and a wide range of common floor substrates

  • Interior and exterior application — suitable for both internal floors and external walkways

  • Supplied in 600 ml foil packs — efficient application with the ARBO Foil Pack Gun

  • 35% movement accommodation — meets ISO 11600 F – 25 HM

Technical Specifications & Downloads

Description/StandardPerformance
ColourGrey
Skin Time (at 20°C / 65% RH) 85-90 minutes
Application Temperature+5°C to +40°C
Service Temperature−30°C to +110°C
Typical Shore A Hardness45
Cure Rate (at 20°C / 65% RH)2 mm / 24 hours
Chemical ResistanceModerate resistance to most dilute acids and alkalis. Organic solvents may cause swelling and loss of adhesion.
UV ResistanceVery Good
Service Life 15 years +
Movement Accommodation – Butt Joints35%
Movement Accommodation – Lap Joint70%
Specification Compliance ISO 11600 F – 25 HM
Packaging20 × 600 ml foil packs per box

Associated Products

AG2 Porous Primer

A one-part solvent-based primer for porous surfaces such as concrete, for use with Arbokol AG2 and Arbokol 2150 polysulphide sealants.

ARBO® Cleaner 17

Xylene-based cleaner for the effective cleaning and degreasing of construction substrates prior to sealant application.

ARBO® Cleaner 16

Alcohol-based cleaner suitable for cleaning and degreasing sensitive surfaces prior to sealant application.

Arbokol AG2 Pouring Grade - ARBOSEAL Pro®

A two-part polysulphide sealant in pouring grade consistency for horizontal joints and road or floor applications.

Arbokol 2150 - ARBOSEAL Pro®

A two-part polysulphide sealant for use in expansion joints in concrete, masonry and flooring.

Frequently Asked Questions

1

Why choose ARBOSEAL Pro® Arbothane 1245 for floor joint sealing?
Arbothane 1245 is a self-levelling sealant, which means it flows under gravity into horizontal joints to form a smooth, fully bonded seal without the need for tooling. This makes it particularly efficient for large floor joint programmes in warehouses, factories, and car parks. Its polyurethane chemistry provides a tough rubber seal with 35% movement accommodation, capable of withstanding the dynamic loads imposed by pedestrian and vehicle traffic.

2

What are the key benefits of ARBOSEAL Pro® Arbothane 1245?
Arbothane 1245 delivers self-levelling application convenience combined with durable performance under traffic loading. With a Shore A hardness of 40, a 15+ year service life, and ISO 11600 F – 25 HM compliance, it provides a reliable, long-term seal for horizontal joints in demanding environments. Supplied in 600 ml foil packs for use with the ARBO® Foil Pack Gun, it allows accurate, waste-free application in both interior and exterior settings..
 

3

What is the ARBOSEAL Pro® range?
The ARBOSEAL Pro® range is a comprehensive portfolio of professional-grade sealants manufactured by Adshead Ratcliffe under the ARBO® brand. The range covers silicone, modified polymer, polyurethane, polysulphide, epoxy, acrylic, butyl, and oil-based sealant technologies, providing a complete solution for sealing, bonding, and jointing across all types of construction projects — from glazing and cladding to flooring, facades, and secure environments.
 

4

Which ARBOSEAL Pro® sealant is right for my application?
Product selection depends on the substrate type, joint movement, environmental exposure, and performance requirements. Neutral cure silicones (e.g. Arbosil LMS, Arbosil 1096 S) suit glazing and perimeter sealing. High-modulus options (e.g. Arbomeric MP20) handle structural joints. Polysulphides (e.g. Arbokol AG2, Arbokol 2150) provide chemical resistance for floors, roofs, and water-retaining structures. Epoxy sealants (e.g. Arbokol SECURE, Arbokol 1025 SP) deliver hard-wearing seals for secure environments and pool applications. Contact ARBO® Technical Services for specific guidance.
 

5

What surface preparation is required before applying an ARBOSEAL Pro® sealant?
All joint faces must be clean, dry, and free from dust, oil, grease, loose material, and previous sealant residues. For porous substrates such as concrete and brickwork, the application of an ARBO® primer is recommended to maximise adhesion. Always consult the product-specific Technical Data Sheet (TDS) for primer and cleaner recommendations. Application should be carried out in accordance with BS 8000-16:1997 + A1:2010.
 
 

6

Where can I find technical documentation for ARBOSEAL Pro® products?
Technical Data Sheets (TDS), Safety Data Sheets (SDS), and Declarations of Performance (DoP) for all ARBOSEAL Pro® products are available for download on each individual product page at arbo.co.uk. The full ARBO® Product Catalogue is also available for download. For further technical support or specification advice, contact ARBO® Technical Services directly.

Explore the ARBO® Product Family

Sealants

Sealants for reliable movement joint, perimeter and weatherproof sealing in a wide range of applications.

Weather Protection

Effective weather sealing solutions for interface applications, penetration sealing and structural joints.

Adhesives

Bonding solutions for secure and durable adhesion across façade and construction substrates.

Accessories

Caulking Guns, Nozzles, Knives, Scrapers, G Clamps etc.

Find your contacts

Regardless of whether you are an architect and planner, property developer, industry specialist, distributor, applicator or specifier – if you have any questions about our products, services or specific construction projects, please feel free to contact the CARLISLE® contact person in your area with your technical questions. Our experts will be happy to advise you.

Here's how to do it: Simply enter your postcode in the search field of the map

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Mansfield, Notts NG19 7DW
T +44 1623 627 285
E info.uk@ccm-europe.com

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Main Applications

Arbothane 1245 is the specified choice for horizontal floor joints in high-traffic industrial, commercial, and residential settings.

Warehouse & Factory Floors

Sealing floor joints in warehouses and industrial facilities subject to vehicle and forklift traffic.

Garages & Car Parks

Durable sealing of floor joints in garages and multi-storey car parks exposed to vehicle loads.

External Walkways

Sealing of exterior pedestrian walkway joints exposed to weather and foot traffic.

General Floor Jointing

Self-levelling solution for any horizontal interior or exterior floor joint application.

ARBO AG2 Porous Primer
Read more
ARBO Cleaner 17
Read more
ARBO Cleaner 16
Read more
ARBOKol AG2 Pouring Grade - ARBOSeal Pro®
Read more
ARBOKol 2150 - ARBOSeal Pro®
Read more
ARBOSEAL Pro Range
Discover ARBOSEAL Pro®
Accessories
Discover ARBOPROTECT Pro®
Arbobond Pro
Discover ARBOBOND Pro®
Accessories
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