SX70 Wood Stains
Boracol
Damp Proof Membrane
Damp Proof Cream
Tanking Slurry Systems
Explore Newton
Shop Wykamol Membranes
Waterproof Membrane Kits
ISO-THERM Insulation
Nuaire PIV units
Crack Sealing
Crack Stitching Bars
Explore Soudal
Fix ALL Rewards!
'Genius Gun' Foam Range
Special Offers
Wonder Grip Hub
Browse All Deals
How To Damp Proof Walls
Woodworm: Ultimate Guide
How To Stop Condensation
How To Seal Window Frames
Soudal Silirub EPDM is a high-quality, one-component, neutral-curing silicone sealant and adhesive specifically developed for use with EPDM membranes.
This black, low modulus, permanently elastic sealant offers excellent adhesion to EPDM substrates and various common building materials, making it ideal for bonding and sealing applications in both interior and exterior environments.
Its MEKO-free formulation ensures safe use with minimal emissions, while its UV and weather resistance makes it especially suitable for long-term outdoor applications.
Colour
Size
Free Delivery
on orders over £100(ex. VAT, mainland UK only)
Free Help & Advice
Call 01355 222 777Mon.-Fri 8:30am - 4:15pm, or email us
Next Day Delivery
Order before 14:00 Mon - Fri for same day despatch
Great Service
A proudly independent family business with 40 years experience
✔️ Specifically designed for bonding and sealing EPDM membranes to EPDM and various construction materials.
✔️ Neutral-curing and MEKO-free formulation ensures safe use on sensitive building substrates and surfaces.
✔️ Offers excellent UV resistance and remains permanently elastic for durability in outdoor environments.
✔️ Provides strong primerless adhesion to metals, plastics, glass and EPDM with easy application and tooling.
✔️ Supplied in eco-friendly foil packs to minimise waste on site and support sustainable working practices.
Soudal Silirub EPDM is a high-performance silicone sealant and adhesive, expertly formulated for bonding EPDM membranes to themselves and to a wide range of traditional construction materials. Designed specifically for roofing, waterproofing, and façade systems, this neutral-curing sealant provides outstanding adhesion without the release of corrosive or aggressive by-products. Its compatibility with sensitive substrates makes it a trusted choice in environments where material integrity and performance are critical.
The sealant remains permanently elastic after curing, enabling it to accommodate natural movement in joints and membranes caused by temperature fluctuations and structural dynamics. This is especially vital when working with EPDM materials, which expand and contract regularly due to thermal exposure. The product’s low modulus formulation reduces stress on bonded joints, further supporting long-term reliability in dynamic construction settings.
Silirub EPDM offers excellent resistance to ultraviolet radiation, ozone, and varying weather conditions, making it ideally suited for outdoor applications where long-term durability is essential. Its colour stability ensures that the sealant retains its original appearance without discolouring or degrading over time, even in exposed environments. These features make it particularly effective in roofing systems and external joint sealing where performance and aesthetics are both priorities.
This professional-grade sealant delivers exceptional primerless adhesion to a wide range of substrates, including EPDM, metal, glass, aluminium, and certain plastics. Its smooth extrudability and easy tooling allow for clean, efficient application on site, reducing labour time and improving consistency. Whether used in new installations or repair work, Silirub EPDM provides a strong, flexible bond that stands up to environmental and mechanical stress.
Silirub EPDM is formulated without MEKO, a common additive in silicones that has been associated with potential health risks. By eliminating this component, the product supports safer working conditions and contributes to a healthier on-site environment. Supplied in 600ml foil pack cartridges, the sealant also presents a reduced environmental footprint through minimised packaging waste, aligning with modern sustainability practices in the building industry.
Ideal for both residential and commercial construction projects, Soudal Silirub EPDM has become a preferred choice for contractors and specifiers working with EPDM-based systems. Its tailored formulation, superior adhesion, and resilience under demanding conditions ensure reliable long-term sealing and bonding performance, making it an essential component in modern waterproofing and roofing solutions.
Specialist EPDM Compatibility: Specifically designed for sealing and bonding EPDM membranes, ensuring optimal adhesion and performance without the need for primers or surface modification.
Permanently Elastic: Once cured, the sealant maintains its elasticity, accommodating joint movement and temperature-related expansion and contraction without cracking or delaminating.
Excellent Weather Resistance: Resistant to UV radiation and a wide range of weather conditions, including temperature extremes, ensuring long-lasting outdoor performance without degradation.
MEKO-Free Formulation: Contains no methyl ethyl ketoxime, reducing the release of potentially harmful substances during application and curing, and offering improved occupational health and safety.
Neutral Cure Technology: Will not corrode metals or stain sensitive surfaces, making it suitable for use on a wide variety of substrates commonly found in modern construction.
Excellent Adhesion: Offers strong, reliable adhesion on EPDM and many other construction materials, including metals, concrete, wood, and glass, without the need for primers.
Colourfast Black Finish: Designed to retain its colour over time, even with prolonged exposure to UV light and environmental pollutants.
Low Modulus: Reduces stress at the joint or bonding area, minimising the risk of joint failure and ensuring a strong, flexible bond even under movement.
EPDM-to-EPDM Bonding: Ideal for joining sections of EPDM membrane in roofing and waterproofing systems, ensuring watertight seals and mechanical integrity.
Perimeter Sealing of EPDM Membranes: Used to seal the edges and terminations of EPDM membranes against a range of building materials including masonry, metal, and timber.
Detail Work in Roofing Systems: Provides a flexible, weather-resistant solution for sealing complex junctions, corners, and penetrations in EPDM roof installations.
Facade Applications: Effective for sealing and bonding EPDM membranes in facade construction to maintain air and watertight building envelopes.
Window and Door Sealing: Suitable for use in conjunction with EPDM membranes around windows and doors to ensure long-lasting, flexible perimeter sealing.
General Waterproofing Tasks: Provides reliable waterproof bonding in areas where EPDM membranes are used in conjunction with other building materials, including for cladding and curtain walling interfaces.
All relevant personal protective equipment (PPE) must be worn during handling and application. This includes gloves, protective clothing, and appropriate eye protection. Users should consult the product label and material safety data sheet (MSDS) before use for full guidance on handling and potential hazards. Standard site hygiene practices should be observed at all times.
Ensure adequate ventilation during application and curing. This product meets the requirements of LEED regarding Low-Emitting Materials, complying with SCAQMD Rule 1168 and USGBC LEED 2009 Credit 4.1 for adhesives and sealants.
Soudal Silirub EPDM adheres effectively to a wide range of building substrates including concrete, aluminium, steel, treated wood, rigid plastics, and EPDM membranes. Substrates must be structurally sound, clean, dry, and completely free from dust, grease, oils, or other contaminants that may hinder adhesion.
However, adhesion is not achieved on polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE, such as Teflon®), bituminous materials, or polycarbonate. For these substrates, alternative products from the Soudal range should be considered. For instance, use Silirub MA for natural stones to avoid staining, or Silirub PC for bonding on polycarbonate surfaces.
As EPDM formulations can vary significantly, a preliminary adhesion and compatibility test is strongly recommended for every project.
Porous surfaces should be primed using Soudal Primer 150 to enhance adhesion and surface integrity. Non-porous surfaces such as metals or certain plastics should be prepared with a suitable Soudal Activator or Soudal Cleaner & Degreaser to clean and activate the bonding area.
Before application, ensure that no moisture is present on the surfaces and that any previously applied sealants or contaminants have been removed. It is important to avoid overlapping sealant joints that are exposed to standing water, unless they are already bonded and are being sealed purely for seam finishing.
Soudal Silirub EPDM is supplied in 600ml foil packs and must be applied using a compatible 600ml manual foil cartridge gun, such as the Soudal 600ml Manual Foil Cartridge Gun.
Before use, insert the foil pack into the applicator gun, carefully cut the foil tip, and attach the provided nozzle, trimming it at a 45° angle to suit the required joint width. Extrude the sealant smoothly and evenly along the bonding or sealing surface, maintaining steady pressure to avoid air pockets. Apply in a continuous bead and ensure sufficient contact with the substrate.
Immediately after application, before the sealant begins to skin, smooth off the joint using a soapy solution and a suitable tool such as a finishing spatula. This will help to achieve a professional finish and optimal adhesion.
Avoid using metal spatulas on sensitive materials to prevent damage, particularly on coated EPDM or soft substrates. As with all sealants, ensure that adjacent materials are not disturbed during the curing process.
As a rule of thumb, a 600ml foil pack should yield approximately 24 linear metres of sealant when applied to a standard 5mm x 5mm joint.
Coverage will vary depending on the joint dimensions and application technique. Larger or deeper joints will naturally reduce the linear coverage per pack. It is important to measure total joint volume accurately before beginning application to ensure that an adequate number of foil packs is available for the project. Always allow for a margin of wastage and tooling losses.
Please refer to our Guide on How To Measure The Number of Tubes Required For the Job.
Minimum Width for Joints: 10 mm
Maximum Width for Joints: 30 mm
Minimum Depth for Joints: 10 mm
Recommendation Sealing Jobs: Joint Depth = 0.8 x Joint Width.
The sealant should be tooled off before skinning begins. This typically occurs within 10 to 20 minutes depending on ambient temperature and humidity. Tooling ensures the sealant is pressed properly into the joint and a smooth, finished appearance is achieved.
Once cured, the sealant forms a durable, permanently elastic joint with excellent weather resistance. However, it should not be used in areas where long-term water immersion is expected, nor for sealing glass in aquarium applications.
Uncured Silirub EPDM should be removed immediately using Soudal Swipex Cleaning Wipes before the sealant cures.
Once cured, the product can only be removed mechanically, for example using Soudal Silicone Remover Gel or specialist tools. Tools and equipment should also be cleaned immediately after use to prevent contamination and ensure longevity.
Silirub EPDM must not be used in combination with other reactive joint sealants until the previous product has completely cured. This helps prevent compatibility issues or premature failure.
While the cured sealant is UV and weather resistant, exposure to certain aggressive chemicals, chlorinated hydrocarbons or strong acids may compromise performance. The use of this product is strictly limited to sealing applications involving EPDM membranes and compatible building materials. If used for other purposes, performance cannot be guaranteed.
For structural EPDM membrane overlaps, particularly where long-term water load is expected, mechanical fixing or a separate adhesive solution may be more appropriate. Always store Silirub EPDM in its original packaging in a cool, dry place at temperatures between +5°C and +25°C, away from direct sunlight or frost.
Coming Soon
Description
Application
FAQ's
Data Sheets
