Wykamol ISO-THERM Bond Adhesive

Substrate Suitability

ISO-THERM Bond Adhesive and ISO-THERM Thin Internal Wall Insulation (TIWI) are suitable for use on a wide range of INTERIOR wall substrates, including plaster, concrete, brick, blockwork, and painted surfaces.

All surfaces must be clean, firm, and free from dust, dirt, oil, grease, and any loose or flaking coatings.

The products are designed for interior use only and should not be applied to exterior surfaces.

For optimal performance, surfaces should be stable and in good repair. Highly porous masonry surfaces may require priming with an SBR Bonding Agent, diluted to a ratio of 1 part SBR to 3 parts water, to enhance adhesion and reduce the absorbency of the substrate.

Brick walls can also be insulated using ISO-THERM Bond, although this will significantly reduce the adhesive's coverage area.

Surface Preparation

Proper surface preparation is essential for achieving a strong and durable bond with ISO-THERM Bond Adhesive. All surfaces must be thoroughly cleaned to remove dust, dirt, grease, oil, and any loose or flaking material.

Newly applied finishing plasters should be allowed to cure for at least 4 to 6 weeks and must be fully dry before adhesive application. These surfaces should be wiped clean of dust, efflorescence, and any loose material. Highly polished or shiny plaster surfaces should be roughened using a stiff brush or lightly sanded to create a mechanical key, ensuring good adhesion.

For painted surfaces, both matte and silk finishes are suitable, but silk-painted surfaces should be lightly sanded to remove the sheen and provide a key for the adhesive. Any loose fines from sanding or brushing should be thoroughly removed before adhesive application to ensure a clean bonding surface.

Application Method

ISO-THERM Bond Adhesive should be applied directly onto the prepared substrate using standard plastering tools. It is crucial that all surfaces intended for the installation of ISO-THERM Wall Insulation are completely covered with the adhesive.

Using a 5mm notched trowel, apply the adhesive to create a ribbed mortar bed on the substrate. This ribbed bed helps to ensure even coverage and a secure bond. Position the ISO-THERM insulation onto the adhesive bed and press it firmly into place. Ensure that there is 100% contact between the adhesive and the insulation roll; spot fixing is not acceptable and can lead to poor adhesion and performance.

All joints between rolls of ISO-THERM Wall Insulation should be taped with Scrim Tape to create a seamless barrier and enhance the thermal and damp-proofing performance of the installation.

Allow the ISO-THERM Bond Adhesive to dry for up to 24 hours, depending on site conditions and substrate porosity. Once the adhesive is sufficiently firm, a multi-finish plaster can be applied directly onto the ISO-THERM Insulation to achieve a smooth, finished surface.

Application Conditions and Limitations

The open time of the exposed ribbed adhesive bed is limited to 30 minutes at an ambient temperature of 20°C. It is essential to adhere to this timeframe to ensure proper bonding.

Newly plastered or rendered walls require a minimum drying period of 28 days before the application of ISO-THERM Bond. If plaster or plasterboards have been treated with a surface biocide, such as Wykamol MCS1, ensure a drying time of 24 hours in a room at ambient temperature before proceeding with adhesive application.

ISO-THERM Bond Adhesive should not be applied when the room temperature is below 5°C or is likely to drop below this level within 24 hours after installation. This adhesive is intended for interior use only and is not suitable for exterior applications.

It is crucial to use a notched trowel to ensure the adhesive bed depth does not exceed 5mm, which is optimal for maintaining the adhesive's bonding properties and ensuring effective insulation placement.

Coverage

ISO-THERM Bond Adhesive provides coverage of up to 7m² per 15kg bucket when applied to a level, even surface using a 5mm notched trowel. This equates to an approximate usage rate of 2.2 kg/m².

Coverage may vary depending on the substrate type and surface condition, with rough or uneven surfaces potentially requiring more adhesive to achieve full coverage and a secure bond.

Finishing

Once the ISO-THERM Bond Adhesive is sufficiently firm, typically 24 hours after application on porous surfaces such as plaster, the insulation can be finished with a multi-finish plaster.

Apply the plaster directly onto the ISO-THERM Insulation, ensuring an even coat to achieve a smooth, high-quality finish. The plaster should be applied and trowelled to a consistent thickness to provide a durable and aesthetically pleasing surface that is ready for painting or wallpapering. 

Cleaning

After the application of ISO-THERM Bond Adhesive, all tools and equipment should be cleaned immediately with water to prevent the adhesive from hardening on them.

It is recommended to have a bucket of clean water on hand during the application process to rinse tools regularly, maintaining their effectiveness and ensuring a smooth application.

Other Information

ISO-THERM Bond Adhesive is a specialised product designed to provide a strong and durable bond for ISO-THERM Thin Internal Wall Insulation. For best results, it is crucial to ensure that all surfaces are properly prepared and that the adhesive is applied according to the instructions provided.

The product is not suitable for use in exterior applications or in environments where the temperature may fall below 5°C during the drying period. Always follow safety guidelines and use appropriate personal protective equipment when handling adhesives and insulation materials.

By adhering to these guidelines, users can achieve optimal insulation performance and enhance the thermal efficiency and comfort of their properties.

Q) What is Wykamol ISO-THERM Thin Internal Wall Insulation (TIWI), and what is its primary purpose?  

A) Wykamol ISO-THERM TIWI is an ultra-thin internal wall insulation material, approximately 4mm thick, made from a patented, specially woven polyester-based fabric. Its primary purpose is to improve thermal efficiency in properties with solid walls that are prone to cold, damp, or mould. By creating a thermal barrier, it reduces heat loss, improves energy efficiency, and helps maintain a warmer, drier indoor environment. It is particularly suited for retrofitting older buildings, providing a solution that is easy to install with minimal disruption to existing interiors.

Q) What distinguishes Wykamol ISO-THERM TIWI from traditional insulation materials?  

A) Wykamol ISO-THERM TIWI is distinguished by its ultra-thin design, measuring just 4mm in thickness, which allows for installation without significantly reducing interior space. Traditional insulation materials are typically thicker and may require removing fixtures such as skirtings or door architraves. ISO-THERM TIWI, however, is minimally invasive and does not require extensive modifications. Moreover, it is vapour-permeable yet waterproof, enabling walls to breathe while effectively preventing moisture ingress, thereby protecting against damp and mould growth, a dual functionality that is not usually offered by conventional insulation products.

Q) How does Wykamol ISO-THERM TIWI contribute to preventing damp and mould in buildings?  

A) Wykamol ISO-THERM TIWI is designed with vapour-permeable yet waterproof properties. This unique characteristic allows moisture within the wall to escape, preventing condensation build-up while simultaneously blocking external moisture from penetrating the wall structure. This dual-action significantly reduces the risk of damp conditions and mould formation, which are common in properties with inadequate insulation. Additionally, by stopping lateral damp transfer, ISO-THERM prevents the formation of efflorescent salts, such as nitrates and chlorides, that can lead to unsightly and damaging surface staining.

Q) What is Wykamol ISO-THERM Bond Adhesive, and how is it applied with ISO-THERM TIWI?  

A) Wykamol ISO-THERM Bond Adhesive is a high-performance, ready-mixed adhesive formulated specifically for use with ISO-THERM TIWI. The adhesive is used to secure the insulation to the wall substrate, ensuring a durable bond that supports the insulation's long-term effectiveness. To apply, the adhesive is spread evenly over the prepared substrate using a 5mm notched trowel, creating a ribbed mortar bed. The ISO-THERM insulation is then positioned onto the adhesive bed and pressed firmly into place to ensure full contact and a secure fit. This method ensures optimal adhesion and prevents any gaps that could compromise thermal performance.

Q) Can Wykamol ISO-THERM TIWI be used in any type of property?  

A) Yes, Wykamol ISO-THERM TIWI is versatile and suitable for use in a variety of properties, including residential homes, commercial buildings, listed and heritage buildings, and properties prone to condensation and mould. It is particularly effective in properties with solid walls that lack insulation and suffer from cold and damp conditions. Its ultra-thin profile and ease of installation make it ideal for both new constructions and retrofitting projects, especially where space is at a premium or where maintaining the building's aesthetic integrity is important.

Q) What are the advantages of using Wykamol ISO-THERM TIWI for internal wall insulation?  

A) Wykamol ISO-THERM TIWI offers several advantages, including its ultra-thin design that minimises space intrusion, making it suitable for properties where interior space is limited. It is vapour-permeable yet waterproof, which helps prevent damp and mould while allowing walls to breathe. Its high thermal efficiency reduces energy consumption and heating costs, contributing to lower utility bills and improved energy efficiency ratings. Furthermore, ISO-THERM TIWI is easy to install, lightweight, and flexible, allowing for quick application with minimal preparation and disruption to the existing structure.

Q) Is Wykamol ISO-THERM TIWI suitable for retrofitting older buildings?  

A) Yes, Wykamol ISO-THERM TIWI is an excellent choice for retrofitting older buildings. Its ultra-thin profile allows for insulation without significant disruption to existing architectural features or loss of interior space. It is compatible with various wall finishes and can be installed over existing materials such as plaster, concrete, brick, blockwork, and painted surfaces. This makes it ideal for improving thermal efficiency in older properties where space is limited, and there is a need to preserve the building's aesthetic and structural integrity.

Q) How does the vapour permeability of Wykamol ISO-THERM TIWI benefit wall insulation?  

A) The vapour permeability of Wykamol ISO-THERM TIWI allows moisture within the wall structure to escape, reducing the risk of condensation build-up. This feature is particularly beneficial in older properties or those with solid walls that are more prone to damp and moisture retention. By allowing walls to breathe while preventing external moisture ingress, ISO-THERM TIWI helps maintain a dry and stable interior environment, which is essential for preventing damp-related issues and enhancing the overall thermal comfort of the property.

Q) What types of substrates are suitable for applying Wykamol ISO-THERM TIWI?  

A) Wykamol ISO-THERM TIWI is designed for application on a wide range of interior wall substrates, including plaster, concrete, brick, blockwork, and painted surfaces. All surfaces must be stable, clean, dry, and free from contaminants such as dust, dirt, oil, grease, or loose and flaking material. For highly porous masonry surfaces, it is advisable to prime the area with an SBR Bonding Agent diluted with water to improve substrate stability and enhance adhesive performance. The insulation should not be applied to external surfaces or substrates that are damp, unstable, or unsuitable for insulation.

Q) How should the substrate be prepared before applying Wykamol ISO-THERM TIWI?  

A) Proper substrate preparation is essential to ensure a strong and durable bond when applying Wykamol ISO-THERM TIWI. Begin by thoroughly cleaning the substrate to remove dust, dirt, oil, grease, and any loose or flaking coatings. Newly applied plaster should be allowed to cure for a minimum of 4 to 6 weeks and be completely dry before insulation installation. Highly polished or shiny plaster surfaces should be roughened using a stiff brush or lightly sanded to create a mechanical key, facilitating better adhesion of the adhesive. For painted surfaces, particularly those with a silk finish, sanding is necessary to remove the sheen and provide a suitable key for bonding.

Q) What is the proper method for applying Wykamol ISO-THERM TIWI?  

A) To apply Wykamol ISO-THERM TIWI, start by spreading ISO-THERM Bond Adhesive evenly over the prepared substrate using a 5mm notched trowel. The adhesive should be applied uniformly to create a continuous ribbed mortar bed that ensures optimal bonding. Next, position the ISO-THERM insulation onto the adhesive bed, starting at the top of the wall, and press firmly to ensure full contact. It is crucial to achieve 100% coverage between the adhesive and the insulation to prevent gaps that could compromise thermal performance. Align the edges of each roll carefully, and use Scrim Tape to seal all joints between rolls, creating a seamless and effective thermal barrier.

Q) What is the drying time for Wykamol ISO-THERM Bond Adhesive before finishing can be applied?  

A) The drying time for Wykamol ISO-THERM Bond Adhesive can vary depending on site conditions and substrate porosity, but it typically takes up to 24 hours to dry sufficiently on porous surfaces such as plaster. Once the adhesive is firm, a finishing layer, such as a multi-finish plaster, can be applied directly onto the insulation. It is important to ensure that the adhesive has dried completely to achieve a strong bond and optimal performance of the insulation.

Q) What types of finishing can be applied over Wykamol ISO-THERM TIWI?  

A) After the insulation has been securely affixed and the adhesive has dried, a multi-finish plaster can be applied directly onto Wykamol ISO-THERM TIWI. This finish provides a smooth, high-quality surface that is ready for painting or wallpapering. The plaster should be applied evenly to maintain a consistent thickness and achieve a professional-grade finish that enhances the thermal and aesthetic properties of the insulated wall.

Q) Can Wykamol ISO-THERM TIWI be cut to fit around fixtures and fittings?  

A) Yes, Wykamol ISO-THERM TIWI is highly flexible and can be easily cut to size, making it adaptable to various installation scenarios. It can be shaped around obstacles such as light switches, sockets, radiator brackets, and other fixtures, ensuring a seamless and effective insulation layer without compromising the thermal performance or the aesthetics of the interior space.

Q) What coverage can be expected from a roll of Wykamol ISO-THERM TIWI and a bucket of ISO-THERM Bond Adhesive?  

A) Each roll of Wykamol ISO-THERM TIWI measures 0.95 meters wide by 7.5 meters long, providing a total coverage area of 7.125 m². When applying ISO-THERM Bond Adhesive with a 5mm notched trowel to a smooth, even surface, one 15kg bucket of adhesive will cover approximately 7 m², equating to a usage rate of about 2.2 kg/m². It is important to apply the adhesive evenly to achieve the desired coverage and a secure, durable bond for the insulation.

Q) Is Wykamol ISO-THERM TIWI suitable for use in listed and heritage buildings?  

A) Yes, Wykamol ISO-THERM TIWI is particularly beneficial for use in listed and heritage buildings where preserving original features and aesthetics is crucial. Its minimal thickness allows for discreet insulation that does not compromise the architectural integrity of the building. Additionally, its moisture-resistant properties help protect against damp-related damage, making it an ideal solution for maintaining both the energy efficiency and historical value of such properties.

Q) Can Wykamol ISO-THERM TIWI be used in commercial buildings?  

A) Yes, Wykamol ISO-THERM TIWI is suitable for use in commercial buildings that require enhanced thermal efficiency and moisture control. Its ultra-thin profile and ease of installation allow for quick upgrades to existing spaces, improving energy performance and reducing heating costs without the need for extensive renovations. It is particularly effective in commercial properties that suffer from cold and damp conditions.

Q) How does the KEVLAR-type fibre reinforcement in ISO-THERM Bond Adhesive enhance its performance?  

A) The KEVLAR-type fibre reinforcement in ISO-THERM Bond Adhesive significantly boosts its performance by enhancing vibration tolerance and stability. This reinforcement makes the adhesive particularly suitable for use in environments subject to movement or vibration, such as buildings near transport routes or in seismic zones. The added strength provided by the fibres prevents cracking and ensures a stable, durable bond that withstands environmental stresses, maintaining the integrity of the insulation over time.

Q) What are the application conditions and limitations for Wykamol ISO-THERM TIWI and Bond Adhesive?  

A) Wykamol ISO-THERM TIWI and Bond Adhesive should be applied under specific conditions to ensure optimal performance. The adhesive's open time is limited to 30 minutes at 20°C, and the insulation should be applied within this timeframe to ensure proper bonding. Newly plastered or rendered walls require a minimum drying period of 28 days before adhesive application. If treated with a biocide, a drying time of 24 hours is needed at ambient temperature. The adhesive should not be applied when the room temperature is below 5°C or expected to drop within 24 hours. These products are intended for interior use only and are not suitable for exterior applications.

Q) Can Wykamol ISO-THERM TIWI be used on painted surfaces?  

A) Yes, Wykamol ISO-THERM TIWI can be used on painted surfaces, provided the surface is properly prepared. For surfaces with a silk finish, sanding is necessary to remove the sheen and provide a suitable key for bonding. Matte painted surfaces may not require as much preparation, but all painted surfaces should be clean, dry, and free of loose or flaking material to ensure a strong adhesive bond.

Q) What safety precautions should be taken when using Wykamol ISO-THERM TIWI and Bond Adhesive?  

A) When using Wykamol ISO-THERM TIWI and Bond Adhesive, it is important to follow safety precautions to protect yourself and ensure a safe working environment. Always wear appropriate personal protective equipment, such as gloves, safety glasses, and a dust mask, to avoid contact with the adhesive and insulation material. Ensure that the work area is well-ventilated to prevent inhalation of any fumes or dust. In case of skin or eye contact with the adhesive, rinse immediately with plenty of water and seek medical advice if irritation persists. Additionally, handle all tools and materials with care to avoid accidents or injuries, and store all products in a cool, dry place away from direct sunlight and extreme temperatures.

Q) How does Wykamol ISO-THERM TIWI improve energy efficiency in homes?  

A) Wykamol ISO-THERM TIWI improves energy efficiency in homes by providing a thermal barrier that reduces heat loss through solid walls. This results in a warmer interior environment and reduces the need for excessive heating, thereby lowering energy consumption and heating costs. The improved thermal performance also contributes to better Energy Performance Certificate (EPC) scores, enhancing property value and reducing the carbon footprint of the building.

Q) Can Wykamol ISO-THERM TIWI be used in properties with limited interior space?  

A) Yes, Wykamol ISO-THERM TIWI is ideal for properties with limited interior space due to its ultra-thin profile of just 4mm. This minimal thickness ensures that the insulation can be installed without significantly reducing the usable space within a room. It is particularly suited for small rooms, corridors, or areas where maximising space is essential, offering a high-performance insulation solution that does not compromise the room's functionality.

Q) How does Wykamol ISO-THERM TIWI align with government retrofit policies?  

A) Wykamol ISO-THERM TIWI aligns with government retrofit policies aimed at improving the energy efficiency of the housing stock. By providing an effective insulation solution for solid wall homes, ISO-THERM TIWI helps increase the market penetration of solid wall insulation measures, contributing to overall energy savings and reducing carbon emissions. Its ease of installation, minimal disruption, and cost-effectiveness make it a suitable choice for large-scale retrofitting projects, supporting government initiatives to enhance building energy performance.

Q) What environmental benefits does Wykamol ISO-THERM TIWI offer?  

A) Wykamol ISO-THERM TIWI offers several environmental benefits, primarily by enhancing the thermal efficiency of buildings, which reduces energy consumption and greenhouse gas emissions. By minimising heat loss, ISO-THERM TIWI helps lower the carbon footprint associated with heating and cooling residential and commercial properties. Additionally, its ultra-thin profile and minimal material use contribute to reduced waste during installation, supporting sustainable building practices.

Q) How does Wykamol ISO-THERM TIWI compare to traditional internal wall insulation methods?  

A) Wykamol ISO-THERM TIWI provides a less invasive alternative to traditional internal wall insulation methods, which often require thicker materials that can reduce living space and involve more complex installation processes. With a thickness of just 4mm, ISO-THERM TIWI can be installed quickly and efficiently without significant preparation or the need to remove existing fixtures. It is also vapour-permeable and waterproof, offering superior protection against damp and mould compared to conventional insulation products that may not provide this dual functionality.

Q) Can Wykamol ISO-THERM TIWI and Bond Adhesive be used in environments subject to high vibration or movement?  

A) Yes, Wykamol ISO-THERM TIWI and Bond Adhesive are suitable for use in environments subject to high vibration or movement, thanks to the KEVLAR-type fibre reinforcement in the adhesive. This reinforcement provides enhanced vibration tolerance, making the adhesive ideal for use in properties located near transport routes, in seismic zones, or other areas with frequent movement. The reinforced adhesive layer prevents cracking and ensures a stable, durable bond, maintaining the performance of the insulation in challenging conditions.

Q) What are the cleaning procedures after using ISO-THERM Bond Adhesive?  

A) After using ISO-THERM Bond Adhesive, all tools and equipment should be cleaned immediately with water to prevent the adhesive from hardening on them. It is advisable to keep a bucket of clean water nearby during the application process to rinse tools regularly. This helps maintain the effectiveness of the tools and ensures a smooth application of the adhesive and insulation material. Regular cleaning during use also prevents contamination and ensures a professional finish.

Q) How should Wykamol ISO-THERM TIWI and Bond Adhesive be stored?  

A) Wykamol ISO-THERM TIWI and Bond Adhesive should be stored in a cool, dry place, away from direct sunlight and extreme temperatures. The products should be kept in their original packaging to protect them from damage and contamination. Proper storage helps maintain the quality and performance of the insulation and adhesive, ensuring they are ready for use when needed.

Q) Can Wykamol ISO-THERM TIWI be used to improve the thermal performance of external walls?  

A) No, Wykamol ISO-THERM TIWI is specifically designed for internal wall applications only and is NOT suitable for external use. For improving the thermal performance of external walls, other types of insulation specifically designed for exterior applications should be considered. Using ISO-THERM TIWI on internal walls, however, can significantly enhance the overall thermal efficiency of a property by reducing heat loss through the building envelope.

Technical Data Sheet

Safety Data Sheet