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Arbokol 1025 SP - Two-Part Epoxy Sealant for Swimming Pools

ARBOSEAL Pro® Arbokol 1025 SP is a two-part epoxy sealant that cures to form a hard-wearing seal with excellent water immersion resistance and high chemical resistance. Designed for swimming pools, compression joints, tile-to-tile joints, and any internal stress relief joint system requiring long-term water and chemical resistance, it accommodates significant movement in compression.

Specify Arbokol 1025 SP

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Unique properties of ARBOSEAL Pro® Arbokol 1025 SP

ARBOSEAL PRO® Arbokol 1025 SP delivers the hard-wearing, chemically resistant seal required for swimming pools, wet rooms, and water-immersed joint systems.

  • Two-part epoxy formulation — hard-wearing seal with excellent chemical and water resistance

  • Significant movement accommodation in compression — 50% compression movement

  • No primer required for tile-to-tile joints — simplifies installation

  • High resistance to cleaning chemicals used in swimming pool environments

  • Shore D hardness of 60–70 — robust performance in demanding aquatic environments

  • 20+ year service life in non-critical applications

Technical Specifications & Downloads

Description Performance
Colours:Off White, Grey
Typical Shore D Hardness (cured at 20˚C): 60 – 70 Work Life (Typical at 20˚C)
Application temperature:+10˚C to + 40˚C
Service temperature:
-20°C to + 90°C
Cure Rate (at 20˚C): 48 hours. At lower temperatures cure rate will be extended. NOTE: Allow for full chemical cure before any form of immersion.
Chemical Resistance: Resistant to most alkalis and dilute acids, petrol, diesel and jet fuel. Resistant to most cleaning chemicals used in swimming pool situations (neat Hypochlorite crystals should not be applied to 1025 SP).
Service Life:20 years + in non-critical applications. Use in swimming pools will lower this figure (depending upon application performance required).
Movement Accommodation:Tension 5%
Compression 50%

Associated Products

Arbokol SECURE - ARBOSEAL Pro®

A two-part polysulphide sealant for structural bonding and sealing applications.

Arbokol 2150 - ARBOSEAL Pro®

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

ARBO® Cleaner 16

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

ARBO® Cleaner 17

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

Arbosil 1096 S - ARBOSEAL Pro®

Used for glass to glass joints, perimeter seals on curtain walling, sealing of PVCu frames.

Frequently Asked Questions

1

Why choose ARBOSEAL Pro® Arbokol 1025 SP for swimming pool and water-immersed applications?
Arbokol 1025 SP is formulated as a two-part epoxy to provide the high chemical resistance and water immersion durability that standard silicone or polysulphide sealants cannot match in continuously immersed environments. Its ability to accommodate 50% compression movement makes it suitable for pool perimeter joints that experience thermal contraction and expansion. No primer is required for tile-to-tile joints, reducing installation time and material costs in pool and wet room projects.

2

What are the key benefits of ARBOSEAL Pro® Arbokol 1025 SP?
Arbokol 1025 SP delivers a Shore D hardness of 60–70 combined with 50% compression movement accommodation — a combination that provides physical robustness alongside the flexibility needed for thermally active joints in swimming pools and wet rooms. Its high resistance to pool cleaning chemicals, including most commonly used alkalis and acids, ensures long-term performance in regularly maintained aquatic environments. A 20+ year service life in non-critical applications demonstrates its durability.

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.

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Main Applications

ARBOSEAL Pro® Arbokol 1025 SP is the specified choice for swimming pools, compression joints, tile joints, and water-immersed sealing applications.

Swimming Pools

Sealing pool perimeter joints and compression joints subject to continuous water immersion.

Tile-to-Tile Joints

Sealing tile joints in wet areas without the need for a separate primer.

Shower Rooms

Hard-wearing sealing of joints in shower rooms and wet areas subject to frequent wetting and cleaning.

Water-Immersed Joints

Internal stress relief joints in water-retaining structures requiring long-term water resistance.

ARBOKol Secure - ARBOSeal Pro®
Read more
ARBOKol 2150 - ARBOSeal Pro®
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ARBO Cleaner 16
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ARBO Cleaner 17
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ARBOSil 1096 S - ARBOSeal Pro®
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ARBOSEAL Pro Range
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