D4 adhesive: Properties, Application, Clamping and Wood Discoloration

Adhesive is a solvent free adhesive that can be used externally or internally to give a high strength and waterproofed bond to the two uneven surfaces. There are certain properties of a reliable D4 adhesive:

• Quickly gets set on an application.
  
• Short presstime.
  
• Improved adhesion on difficult wood species, especially oak and larch.
  
• No discolouration of the glue line due to the influence of process heat.
  
• Enhanced heat and water resistance when using high process temperatures.
  
• Machining the glue joints causes very little wear on the tools.
  
• The hardened glue joints exhibit excellent resistance to higher temperatures.
  

Applications

Apply d4 adhesive as an even coat on a single surface. If required for higher water resistance, apply a thin and even coat on both surfaces using an applicator, glue roller, notched trowel, brush or other device.

• The parts should mate well and be free of dust and grease. Excess tolerances to the fit result in increased setting times and reduced strength.
  
• The joints should be cut shortly before gluing.
  

Clamping:

Place the two parts together within the open time and clamp until the required initial strength is achieved and the clamps can be removed. The clamping pressure should be high enough that the entire connecting area of the joint is in firm contact. Depending on the material and type of glue joint, the mechanical strength required for further processing of the parts is achieved.

Wood Discoloration

Due to the various mixtures of wood components, which are dependent on the growing region and the manner in which the woods have been pre-treated, unpredictable discolouration may arise in some cases on various types of wood, such as beech, cherry, etc. In addition, iron in combination with the tannic acid of the wood can bring about a discolouration of the wood, especially with oak.

End-Note:

You will find multiple adhesives and sealants online, but ensure to check the quality, adherence, prices, customer service, payment options, etc., in a company before pulling chords with it.