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Firobond ultra adhesive

Product 141


Powerful, fire retardant adhesive for bonding mineral wool insulation and inorganic or wood-based board materials

Not available to purchase online.

We need to ask you a few more questions and ensure this is the suitable product for your needs.

To order please call us on +44 (0) 1 304 842 555


Firobond Ultra Adhesive is a high-performance fire resistant adhesive for mineral wool. Specially developed for the bonding of mineral wool, inorganic board materials and wood-related products such as MDF. Produces a strong, durable bond, ideal for use in constructions which will require up to a 2-hour fire rating. Envirograf offers a wide range of sealants, fillers and adhesives for various needs either for internal or external use.


– Can be used to bond inorganic board materials, including magnesium oxide, cement boards and laminated boards

– Ideal for use with wood-related products, including MDF, chipboard and plywood

– Forms a strong enough bond for use in the manufacture of internal partition walls, modules, fire doors and other fire-rated timber assemblies as well as standard timber doors

– Once cured, offers high impact resistance and minimises water absorption into porous materials, such as wood or mineral wool

Application Instructions

Firobond Ultra Adhesive is thixotropic, which facilitates easy application, and it is designed to minimise absorption into porous substrates.

Firobond Ultra Adhesive can be applied by an extrusion nozzle or bead head by a pump system for fast production rates. Available in a 310ml tube to fit a standard mastic gun, or containers of . kg, 1 kg 2. kg, 5 kg, and 20 kg.

Firobond Ultra Adhesive should be applied to the board material at a coating rate of 100g/m. [10m./kg] to 250g/m. [4m./kg] depending on the porosity of the substrate. Mineral wool should be consolidated into the adhesive within 5 to 10 minutes. The panel should be constructed immediately and placed under pressure to consolidate the bond, thus ensuring pressure is applied evenly across the panel. Can be applied to wood joints, used for applying Envirograf® intumescent paper, material, card, and veneers to wood, plywood etc. Also used to adhere veneers to MDF, plywood, etc, giving a fire-resistant bond.

Initial bond: 10 to 20 minutes

Tack life: 10 minutes

Full cure: within 24 hours

Order References / Sizes

Ref                        Mass

FUA/0.5                0.5kg

FUA/1                   1kg

FUA/2.5                2.5kg

FUA/5                   5kg

FUA/20                 20kg