paramelt products
Our range of adhesive solutions for roofing membranes:
Roofing membrane adhesives
Paramelt offers a comprehensive range of Dynol™ adhesives for partial or full surface gluing of EPDM, TPO and PVC single-ply roofing membrane as well as for specific applications, like roofing up-stands and façade.We formulate bespoke products to match specific membrane manufacturer requirements.
1-C PU adhesives
The Dynol™ range of 1-C PU adhesives offers tailored solutions for partial or full-surface bonding of both EPDM and other fleece-backed membranes. These products are formulated and qualified for specific membrane grades.
Contact and paste adhesives
The Dynol™ range of contact adhesives offers products for full surface bonding of EPDM, PVC and TPO for flat roofing, overlap-bonding and upstands. Dynol™ paste and MS paste adhesives are available for gluing EPDM strips in façade and window sealing applications.
Primers
Our range of Dynol primers offer tailored adhesives for the bonding to self-adhering membranes, vapour control layers and tapes. Primers for porous substrates, difficult to adhere materials and for low temperature application conditions.
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Contact a Specialist
Wim van Praag
Product Manager Construction Adhesives
Dynol paste grades are solvent-bourne paste adhesives primarily used for the vertical bonding of EPDM membranes in building-façade applications. Our products are suitable for bonding to most substrates including metal, wood, aluminium, concrete, PVC and glass. For very open, porous or difficult to bond surfaces, a suitable Dynol primer can be proposed to ensure effective bonding is achieved.
Dynol paste adhesives are supplied in 600 ml aluminium sausage packaging units for use in standard gun applicators. Alternatively, they can be supplied in larger volumes in drums for contract packaging to alternative specifications.
Paste adhesives are generally hand-applied as a thick bead, typically in the range of 20-50g per linear meter, depending on the weight (thickness) of EPDM to be bonded and the size of effective bonding area required. Various grades are available depending on the specific EPDM to be used.
In addition to the standard solvent-based grades, recent developments in polymer technology have allowed the development of high-performance, solvent-free MS adhesives. These provide equivalent performance whilst bringing the benefits of PU and VOC-free operation in relation to working environment and atmospheric emissions.
Depending on the type of membrane and application, the following properties of the adhesive are important:
- High ‘green tack’
- Rapid strength built
- Long shelf life
- Aging resistance (strength)
- Heat resistance
- Easy application
Paramelt’s range of Dynol primers are applied onto the substrate surface in order to provide a controlled and receptive surface for subsequent bonding. The Dynol primers are first applied to the target surface and after drying, provide a tack-free working surface for further installation operations.
Dynol primers are most commonly employed to provide a suitable surface for the bonding of self-adhering membranes, but are also used in a similar function for vapour-control layers and adhesive tapes. Dynol primers can be especially important when using self-adhering materials in low temperature environments, where it is required to compensate the low-tack performance of the self-adhesive material.
Dynol primers may also be required for highly porous concrete to close and stabilise the surface. Additionally, for some difficult to adhere surfaces, such as plastic-coated steel, a primer may be required to provide an adhesive receptive surface for subsequent bonding with the required typical 1-K PU roofing adhesives.
Typical surface preparation applications employing Dynol primers:
- Self-adhering membranes
- Self-adhering vapour-control layers
- Adhesive tapes
- Porous substrates
- Coated substrates
- Low temperature conditions
We provide a broad portfolio of Dynol primers designed to match the particular pressure sensitive adhesive (PSA) employed on the self-adhering membrane, vapour-control layer or tape. We also provide a number of Dynol grades to tackle different surface environments, such as concrete or coated steel.
Our proprietary formulation technology allows us to achieve high dry solid content in our solvent-based primers, which allows for a significant reduction in the required primer consumption per m2/sq.ft and gives a substantial lowering of overall VOC emission levels.
Our high-solids, Dynol primers, can be used with a wide range of application methods such as, roller or brush applied or increasingly in combination with various spraying techniques. The use of pressurised canisters to ease application and increase productivity during installation of large surfaces is increasing. Our unique product formulation enables use not only with compressor-based spraying equipment, but can also be supplied in pre-pressurised canister or aerosol packaging units.
Depending on the type of membrane and application, the following properties of the adhesive are important:
- Good surface coverage
- Dry film
- Long working time
- Direct adhesive anchorage
- Aging resistance (strength)
- Heat resistance
Contact adhesives are applied to both surfaces of materials to be joined and can be used in a wide range of applications providing instantaneous bonding and high adhesive strength. Paramelt provides a comprehensive range of products encompassing EPDM, PVC, ECB, EVA, PIB, FPO/TPO and Hypalon single-ply membranes.
Vertical bonding
Our range of Dynol contact adhesives are primarily used in highly inclined or vertical bonding applications, where direct bonding is required to hold the membrane in place. Typical examples would be upstands on the flat roof and frame elements on the building façade.
Overlap bonding and membrane splicing
In addition, the use of two-side contact adhesive bonding is extremely effective for overlap bonding and membrane splices.
Horizontal application
Dynol contact adhesives can also be used for horizontal membrane bonding to provide added robustness and security.
Our high-solids, Dynol contact adhesives, can be used with a wide range of application methods such as, roller or brush applied or increasingly in combination with various spraying techniques. The use of pressurised canisters to ease application and increase productivity during installation of large surfaces is increasing. Our unique product formulation enables use not only with compressor-based spraying equipment, but can also be supplied in pre-pressurised canister or aerosol packaging units.
In order to ensure that roof or façade assembly is correctly constructed, using the required combination of adhesive and membrane, Paramelt commonly supplies its products to market via the roofing and façade materials manufacturers, often branded as a private label product. This close partnership with the membrane producers allows us to develop beyond a generic adhesive for a certain membrane material. For every producer we are able to develop a specific adhesive, that is fully optimised to achieve the best performance for each specific material formulation and product construction. For example, each individual EPDM producer needs their own tailored adhesive to get the best performance from their system.
Through our extensive knowledge and experience we are able to provide a specific contact adhesive for every type of naked EPDM. Our usual model is to develop, together with the EPDM manufacturer, a bespoke adhesive in order to guarantee long-term system reliability. In addition to EPDM we also tailor specific products for modified bitumen, TPO, PVC and other singly-ply membrane materials.
Our proprietary formulation technology allows us to achieve very high dry-solid content in our solvent-based contact adhesives. Typically, we can offer as much as twice the solids content of competing technologies, which allows for a significant reduction in the required adhesive consumption per m2/sq.ft and gives a substantial lowering of overall VOC emission levels.
Depending on the specific type of membrane and application method employed, the following properties of the adhesive are of critical importance:
- Green-bond
- Rapid strength development
- Aging resistance (strength)
- Heat resistance
- Open time
- Viscosity
Ever since the first EPDM roof coverings appeared on the European market more than 40 years ago, Paramelt has been supplying adhesives to fix them in place.
Since then, the single-ply roofing market has evolved significantly. There is now a much more diverse range of potential membranes available to the contractor, including PVC, ECB, EVA, PIB, FPO/TPO and Hypalon coverings. In parallel with the technology evolution, Paramelt has been continuously developing its range of moisture curing adhesives to provide optimal bonding between the different membranes and roofing substrates. In order to ensure that roof assembly is correctly constructed, using the required combination of adhesive and membrane, Paramelt commonly supplies its products to market via the roofing materials manufacturers, often branded as a private label product.
This close partnership with the membrane producers allows us to develop beyond a generic adhesive for a specific membrane material. For every producer, we are able to develop a specific adhesive that is fully optimised to achieve the best performance for each specific material formulation and product construction. For example, each individual EPDM producer needs their own tailored adhesive to get the best performance from their system.
comprehensive product range
Paramelt offers a full range of bespoke products for the following materials:
- Specific products on naked EPDM
- Low solvent-based and solvent-free products
- Fleece-backed membranes, specific products for Full bonding or Partial bonding
- Fleece-backed membranes, specific products for:
- Thin fleece and so more plasticizer resistance
- Specific products to fleece-backed EPDM
Our PU adhesives have a low total solvent content or are completely solvent-free. Our solvent-based adhesives are free of toluene and methylene chloride.
Our standard program is recommended for one side application on flat surfaces from horizontal up to an angle of 20° inclination, using typical planar membranes. Products can also be used for ridge application, where roller-applied pressure is required to ensure effective spreading of the adhesive in order to achieve a full bond. We do not recommend spray application for polyurethanes.
Depending on the specific application and the type of membrane, the following properties of the adhesive are more or less critical:
- Initial strength
- Aging (strength)
- Open time
- Cure time
- Tack, green strength
- Viscosity
Single ply roofing membranes
The use of single-ply membranes provides a complete roofing solution, which can be constructed in-situ on location. The roof comprises strong and flexible synthetic membranes, which are attached or bonded to the structural deck, using either mechanical fixings or adhesives. Paramelt offers a comprehensive range of adhesives for single-ply membrane bonding.
Single-ply roofing provides an attractive alternative to traditional bitumen covering with a number of significant advantages.
Adhesives in single-ply roofing
There are a number of potential flat-roof construction solutions to provide a wind and waterproof covering for the structural deck of the roof. Traditionally asphalt felts or reinforced bitumen have been used or solutions such as lead, copper & zinc, tiling (e.g. concrete, rubber, bitumen or plastic), glass-reinforced plastics or green roof systems. Single-ply roofing systems are increasingly the preferred solution, where the combination of a synthetic membrane together with an insulating layer provides an integrated, strong and efficient roofing solution.
Single-ply roofing provides a number of significant advantages over other structures:
- Rapid construction allowing early interior fit-out
- Low capital cost and cost-in-use
- Safe, flame-free construction using hot-air welding, adhesives and fasteners
- High thermal performance using lightweight, thermally efficient rigid insulation
- Elimination of cold-bridging by use of thermal break fasteners
- Effective control of air leakage to meet new energy efficiency regulations
- Minimize roof depth to maximise design freedom
- Flexibility of single-ply technology offers maximum freedom of choice in roof design, performance level and appearance
- Easy to repair & modification
- Simple detailing to suit all situations
- Easy interfacing to other construction elements
- Various colour options with matching profiles for eaves, verges and parapets
- Refurbishment solution for existing bitumen roofs
‘Cold roof’ vs ‘warm roof’ construction
Common membrane-based roofing solutions can be described as either a ‘cold roof’ or ‘warm roof’ construction. Whereas the warm-roof construction offers complete insulation across the whole surface area, the conventional cold roof offers only partial insulation in the areas where the insulating medium can be accommodated between the joists. With today’s focus on energy efficiency, the warm-roof assembly is the preferred option where other design criteria permit.
- Cold roofs are more time consuming to construct
- Renovation of existing structure with the cold-roof method is more complex and expensive
- Cold roofs allow more thermal bridges
- Cold roofs require ventilation to avoid condensation
- Warm roofs are thicker as the insulation is on top of the roof
Use of adhesives
Adhesives are primarily used in warm-roof applications, where a typical build-up would be as followed:
- Structural underground typically concrete, wood, steel or a pre-existing roof
- Vapour-control layer (where needed) – adhesively bonded
- Insulation – adhesively-bonded
- Roof covering membrane – adhesively-bonded
Adhesive bonding vs mechanical fastening
An alternative to adhesive bonding in warm-roof construction is the use of mechanical fastenings, however, adhesives provide a number of benefits compared to this approach:
- Faster construction method, saving costs and time
- Better roof integrity as there is no need to puncture any of the structural layers
- Higher strength due to better distribution of forces across the roof area
- Better insulation by elimination of cold bridges
- Reduced disturbance from noise during installation
Geographical differences
Roofing methods and preferences vary across geographical regions due to historical technology evolution as well as local climatic influences. A macro comparison between the current situation in Europe and the USA reveals some significant differences in approach.
In the US the trend is increasingly towards the use of TPO membranes as the preferred solution. In contrast, in Europe, whilst there is growth in the use of single-ply structures, asphalt continues to represent the primary flat-roof construction method. There are also regional differences in the actual structural make-up of single-ply solutions. In Europe roofing membranes are typically standardized at 1,2 m (typically EPDM) which is already fleece-backed using PU adhesives. The predominant construction method is the use of glued overlap joints with contact adhesives. In the US roofing materials tend to be significantly wider, up to 9m wide naked EPDM for example, used in combination with a separate insulation medium supplied in roll form. Combination of the materials is completed onsite using a diverse array of contact adhesives, tapes and primers to form the joints.
construction adhesives are in our dna
Paramelt is global supplier of adhesives for the flat roofing and sandwich panel market. For over 40 years, we have been formulating for the construction industry, becoming European market leader for adhering roofing membranes.
We are Paramelt
Paramelt
Dutch, since 1898
revenue 2023: €263 mln
# employees 2023: 502
owned by Ter Group
Ter Group
German, since 1908
revenue 2023: €910 mln
# employees 2023: 1140
owned by Westphal family
Since the inception of single ply roofing in Europe, we have been in the forefront of adhesive development for applying the insulation, facade & roofing membrane, building on our standard products for sandwich panel construction.
Specialists (niche player)
# active formulas
~ 150 adhesives
# active packagings
~ 190 variations
We are specialists, responsive with short communication lines. We actively pursue new opportunities offering a good fit with our capabilities. Our financial mass allows us to meet evolving market demands and support technology advancements.
With an entrepreneurial attitude
Annual re-investment rate
~10%
Our portfolio is largely unique and fully driven by specific application requirements. Our extensive staff of specialists is able to innovate new solutions to tackle different substrates & application methods or assist in practical projects.
Driven by technology and innovation
# laboratory requests
> 20 last year
# new commercial products
5 last year
Our adhesives undergo an extensive range of tests to ensure long-term ageing and weather resistance as well as fire rating where appropriate. We aim to qualify multiple raw materials to ensure ongoing security of the supply chain.
Delivering security and consistency
Financial stability
D&B rating 1
Top 3 reasons to
recommend Paramelt*)
– reliable supplier
– consistent quality
– value for money
*) Customers survey Europe and USA
Serviced by regional sales specialists, our customers can be assured of the highest levels of local service and product support. Where needed, we can adjust performance to meet specific geographical requirements.
With a global reach and local service
customers in
> 25 countries
Our construction business rests on a knowledgeable team, from highly qualified chemists through to experienced application technicians. The business is based on close partnership and largely supplied via bespoke private label products.
Building on people and partnership
Average employee retention
> 12 years
Paramelt = ‘knowledge & experience’
recognized by > 85% customers
(Customers survey Europe and USA)
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With 8 production facilities delivering in more than 80 countries, we have truly global perspective and local service.