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What is the difference between Pur wood glue and PVA wood glue

May 03,2024 | Views: 128

PUR wood glue

and white latex wood glue are two common types of adhesives used in woodworking, each with its own characteristics and advantages. Here's a comparison of the two:

1. Composition:
PUR Wood Glue: PUR glue is a polyurethane-based adhesive that cures through a chemical reaction with moistureļ¼Œ It's often brown color and has higher viscocity than PVA glue.
White Latex Wood Glue: White latex wood glue, also known as PVA (polyvinyl acetate) glue, is water-based and contains synthetic polymers. It's often white color and has a milky consistency.

2. Bond Strength:
PUR Wood Glue: PUR glue typically forms a stronger bond compared to white latex wood glue. It's known for its exceptional strength and durability, making it suitable for heavy-duty woodworking applications.
White Latex Wood Glue: While white latex wood glue provides a strong bond, it may not be as strong as PUR glue, especially in demanding conditions or with certain types of wood.

3. Water Resistance:
PUR Wood Glue: PUR glue offers excellent water resistance, making it suitable for both interior and exterior woodworking projects. It can withstand exposure to moisture without compromising the bond.
White Latex Wood Glue: While white latex wood glue provides some level of water resistance, it's not as resistant to moisture as PUR glue. Extended exposure to water can weaken the bond over time.

4. Drying Time:
PUR Wood Glue: PUR glue typically has a longer open time compared to white latex wood glue, allowing for more time to adjust and assemble the pieces before the glue sets. However, it may take longer to fully cure.
White Latex Wood Glue: White latex wood glue usually has a shorter drying time compared to PUR glue. It sets relatively quickly, but the bond may not reach full strength until it has fully cured.

5. Gap-Filling Properties:
PUR Wood Glue: PUR glue has excellent gap-filling properties and can fill small imperfections or irregularities in the wood surfaces being joined.
White Latex Wood Glue: While white latex wood glue can fill minor gaps, it may not be as effective as PUR glue in filling larger gaps or irregularities.

In summary, PUR wood glue is known for its exceptional strength, water resistance, and gap-filling properties, making it ideal for demanding woodworking applications. White latex wood glue, on the other hand, 

offers strong bonding capabilities and versatility but may not provide the same level of strength and water resistance as PUR glue. The choice between the two depends on the specific requirements of the woodworking project.

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