Can wood glue bond painted or varnished wood?

Not reliably. PVA needs to wet bare wood fibers, while a finished surface makes the glue depend on the paint or varnish staying attached. Remove the coating inside the joint before gluing.

Why is an end-grain glue joint weak?

Open end grain pulls liquid glue away from the bond line like a bundle of straws. Brush on a light sizing coat first, let the fibers absorb it, then apply the bonding coat and clamp the fitted joint.

Why did wood glue leave a pale patch under stain?

Dried glue sealed the pores, so the stain could not enter the wood evenly. Remove squeeze-out before finishing; once stain reveals the patch, sanding back to clean fibers is the dependable repair.

Is every wood glue suitable outdoors?

No. Some PVA formulas are intended only for dry interior work, while others are rated for weather exposure. Read the individual product label and still avoid uses the maker excludes, such as continuous immersion.

Todos los tipos de pegamento

Tipo de pegamento

Cola para madera (PVA)

La opción por defecto para madera con madera. Una unión curada con PVA es más fuerte que la propia madera.

Ideal para

Qué une mejor Cola para madera (PVA)

También funciona, con condiciones

No adhiere en

Metal, Plástico, Vidrio, Cerámica, Tejido / Tela, Caucho / Goma, Hormigón y piedra, Cuero / Piel, Aluminio, Polipropileno (PP), Polietileno (PE / PEAD / PEBD), Pladur (Cartón yeso)

Herramienta equivocada

Materiales no porosos como metal, vidrio o plástico: necesita penetrar en el poro para actuar.

Uso

Cómo usar Cola para madera (PVA)

01Una capa fina en ambas caras funciona mejor que una gruesa en una sola.
02Aprieta con firmeza con sargentos: el PVA necesita presión de contacto mientras seca.
03Limpia el sobrante con un paño húmedo antes de que forme película.
04Las piezas deben encajar ajustadas: la cola blanca o de carpintero no rellena huecos.

Pares de materiales

Pares de materiales para los que Cola para madera (PVA) es la mejor opción

Madera

Guías

Reparaciones que usan Cola para madera (PVA)

Artículos

Cómo funciona Cola para madera (PVA)

Preguntas

Preguntas frecuentes sobre Cola para madera (PVA)

Can wood glue bond painted or varnished wood?: Not reliably. PVA needs to wet bare wood fibers, while a finished surface makes the glue depend on the paint or varnish staying attached. Remove the coating inside the joint before gluing.
Why is an end-grain glue joint weak?: Open end grain pulls liquid glue away from the bond line like a bundle of straws. Brush on a light sizing coat first, let the fibers absorb it, then apply the bonding coat and clamp the fitted joint.
Why did wood glue leave a pale patch under stain?: Dried glue sealed the pores, so the stain could not enter the wood evenly. Remove squeeze-out before finishing; once stain reveals the patch, sanding back to clean fibers is the dependable repair.
Is every wood glue suitable outdoors?: No. Some PVA formulas are intended only for dry interior work, while others are rated for weather exposure. Read the individual product label and still avoid uses the maker excludes, such as continuous immersion.