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

D4 Waterproof Wood Adhesive - Bond It

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.

D4 Adhesives

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.

D4 Wood Adhesive 1 litre D41 Everbuild Waterproof D4 Wood Adhesive 1 litre D41

Woodstikk® D4 PVA Adhesive is a water proof, high performance, single component, D4 grade, wood adhesive. 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. To ensure safe storage of product, containers should be well sealed to prevent evaporation of water and the formation of skin on the surface. The emulsion must be stored at a temperature above freezing. A temperature of 15-23°C for not more than six months is recommended. Higher temperatures will affect quality and cause the formation of crusts and skins, especially if the containers are not tightly closed or subjected to direct sunlight for long periods.

Woodstikk® D3 PVA is an all purpose, assembly grade, single component waterbased PVA adhesive compliant with EN 204/205 D3 requirements. 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 CLASSES EVERBUILD® D4 Wood Adhesive is a solvent free industrial grade D4 wood adhesive based on the latest hybrid resin technology. EVERBUILD® D4 Wood Adhesive provides the user with a waterproof D4 grade wood adhesive with none of the safety issues associated with conventional isocyanate containing (polyurethane) D4 grades. For best results the moisture content of the surfaces to be bonded should be within the range of 7-13%. The adhesive may be applied with mechanical glue spreaders or by hand, using a brush or roller.