If you require a fully “waterproof” adhesive for bonding wood, you will need to use a phenol resorcinol resin system, e.g. Prefere 4050, or a melamine urea resin system e.g. Prefere 4535. DESCRIPTION OF DURABILITY CLASSES

Egger D4 Chipboard Flooring Adhesive 1kg | Travis Perkins Egger D4 Chipboard Flooring Adhesive 1kg | Travis Perkins

All PU adhesives which are single component MCPU adhesive are likely to conform to the D4 requirements by default as polyurethane is extremely tough and weather resistant. Open assembly time is a maxiumum of 15 minutes depending on the materials to be bonded. Assembly times vary according to the moisture contents and porosity of the substrate and local conditions.

Key Infomation

EVERBUILD D4 Wood Adhesive provides the user with a waterproof D4 grade wood adhesive with none of the safety issues associated with conventional Another feature to look out for is the shelf life. D4 PVA is less stable than D1, D2, and D3 adhesives and most of them only have a recommended shelf life of 3 months. There are a handful, including Woodstikk D4 PVA,which have a shelf life of 6 months if stored correctly. If you are new to using PU adhesives, you may be wondering why they have a D in their title. You might be asking just how a D4 PU adhesive is any different to a D3 or D2 adhesive? It might be easy to tell a Tytex 1 kg 30 Min Set PU Adhesive from a Tytex 1 kg D4 PVA Adhesive. However, the D grade stands for durability and is part of the European standard BS EN 204 which governs the classification of wood glues for non-structural applications, and it helps to show how resistant the adhesive is to water. There are four durability gradings specified, so let us look at D1 through D4 adhesives. Durability Classes: D1 Adhesives:

D4 Chipboard Flooring Adhesive 1kg | Travis Perkins Caber D4 Chipboard Flooring Adhesive 1kg | Travis Perkins

D3 adhesives are considered to be water-resistant. You can use them in interior areas where there is frequent short term exposure to water or moisture and frequent high humidity. Unlike the previous grades of adhesives, you can use D3 outdoors in areas not exposed to the weather. In normal conditions, D3 has a seven-day shelf life with a required bond strength of less than 10 N/mm2. If stored in cold water for four days, it will have a required bond strength of less than 2 N/mm2. After a further seven days of storage, the required bond strength increases to less than 8 N/mm2. D4 Adhesives If the grade is classified as D4, then that means that it should have gone through the testing to ensure that it does meet the requirements. The full D4 classifcation is set out in the EN 204 standard. D references of adhesives are commonly used to identify the water resistance of wood bonding adhesives, but strictly speaking they relate to the durability of the adhesive, not just the water resistance. The standard used to determine the durability class is EN 204: 2001 –“Classification of thermoplastic wood adhesives for non-structural applications”.

Provides the user with a waterproof D4 grade wood adhesive with none of the safety issues associated with conventional isocyanate containing (polyurethane) D4 grades.

30Min Liquid Pu Wood Adh Tr UK | Soudal

D4: Bespoke furniture. High quality joinery, including windows, doors etc. in extreme situations. Timber frame applications including the bonding of chipboard flooring. low timber staining characteristics; no discolouration of the glue line due to the influence of process heat (eg. HF-press) D4 PU adhesives are often considered to be waterproof. You can use D4 PU adhesives in interior areas where there is frequent long term exposure to water or moisture. You can also use D4 PU adhesives in exterior areas exposed to weather, so long as you apply an adequate surface coating. In normal conditions, D4 PU adhesives have a seven-day shelf life with a required bond strength of less than 10 N/mm2. If you store it in cold water for four days, the required bond strength reduces to less than 4 N/mm2. This required bond strength can be maintained if placed in boiling water for six hours, then cold water for two.

Woodstikk® PU Rapid D4 is a single component moisture curing polyurethane wood adhesive with excellent water resistant characteristics. One adhesive does all - our D4 Glue saves time and money for the installation of chipboard flooring. Ideal for all general woodworking and joinery uses, assembly line work, RF HF cure systems, wood on wood laminating, furniture assembly and house hold DIY use. If the grade is classified as D3, then that means that it should have gone through the testing to ensure that it does meet the requirements, which give it its water reisistance. The full D3classifcation is set out in the EN 204 standard. D3 = Interior with frequent short-term exposure to running or condensed water and/or to heavy exposure to high humidity. Exterior not exposed to weather.