Practically D1 and D2 are considered to be “interior grade” adhesives and should not be used anywhere where a high level of durability is required. 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: However, if you can't find what you need please call us 01422 315300 and our Sales Team will be happy to help.

are D2, D3, D4 Adhesives? - Adkwik What are D2, D3, D4 Adhesives? - Adkwik

D3: High quality joinery, furniture making and veneering including flat panel lamination with plastic laminates. Woodstikk® D4 PVA Adhesive is a water proof, high performance, single component, D4 grade, wood adhesive. 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 Provides the user with a waterproof D4 grade wood adhesive with none of the safety issues associated with conventional isocyanate containing (polyurethane) D4 grades.

Key Infomation

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.

30 Minute Polyurethane Wood Glue 750g | Toolstation 30 Minute Polyurethane Wood Glue 750g | Toolstation

An additional certification for D4 PVA adhesives which indicate the quality of the grade is whether they comply to EN 14257 (WATT91). This standard tests the heat resistance of the adhesive, butnot all of them comply. EVERBUILD D4 Wood Adhesive provides the user with a waterproof D4 grade wood adhesive with none of the safety issues associated with conventional D4: Bespoke furniture. High quality joinery, including windows, doors etc. in extreme situations. Timber frame applications including the bonding of chipboard flooring. D2 = Interior with occasional short-term exposure to running or condensed water and/or to occasional high humidity provided the moisture content of the wood does not exceed 18%. Bond It offer a wide range of high quality building products for both the Trade and DIY enthusiasts. Covering everything from silicone sealants to bitumen roofing solutions we have it covered. Split into easy identifiable, recognised brands finding the right product for the right job should be easy.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. D3 adhesives are often referred to as “water resistant” and D4 adhesives are referred to as “waterproof”. Whilst this gives a simple way of identifying the difference, it is not strictly true to say that D4 is “waterproof”. The official description of the durability classes from the EN204 standard is shown below and this gives context around what you can expect the bond performance to achieve. D1 adhesives are the lowest in terms of durability. These adhesives work in interior areas in which the temperature rarely exceeds 50C. In addition, you can use them on wood with a moisture content up to 15%. They have a storage life of up to seven days in standard room temperatures and humidity. They have a required bond strength of less than 10 N/mm2, and you should use them for external wood bonding. D2 Adhesives ThePfohl adhesive spreaderused in this videois the benchmark in the industry for applying adhesive to panels and boards. It is suitable for use with PVA and EVA water based adhesives and UF, MUF and PRF formaldehyderesins. 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.

D4 PVA and PU What is the difference between D1, D2, D3 and D4 PVA and PU

Everbuild D4 Wood Adhesive can be used internally and externally and gives a high strength, water resistant, impact and temperature resistant bond 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 CLASSESit is possible to process wood species like pine or spruce with pressing times of minimum 12 minutes Woodstikk® PU Rapid D4 is a single component moisture curing polyurethane wood adhesive with excellent water resistant characteristics.