• One-part moisture-cure polyurethane wood adhesive, no mixing
• Waterproof bond, for interior and exterior woodworking
• Expands slightly while curing to fill small gaps in the joint
• Strong, durable bond on timber and board materials
• Brown 750 g bottle or clear 300 ml sausage
• Single or trade box of 12

First, make sure both surfaces are clean and sound. A very light dampening of one face helps a moisture-curing PU start to cure, but do not soak it.

Next, apply the adhesive to one surface, bring the parts together and clamp them.

Then keep the joint clamped while it cures, because PU expands slightly and the parts can otherwise creep apart.

Finally, trim off any cured foam once set. For general indoor joinery a D3 PVA such as our Duo is cleaner to use; for multi-material waterproof bonding, see The Beast PU adhesive.

• Product codes: BDAPU375 (750 g, brown), BDAPU5 (300 ml, clear)
• Type: one-part, moisture-cure polyurethane wood adhesive
• Bond: waterproof, interior and exterior
• Behaviour: expands slightly on cure to fill small gaps
• Sizes: 300 ml sausage and 750 g bottle
• Pack sizes: single or trade box of 12

Is it really waterproof?

Yes, it is a moisture-cure polyurethane wood adhesive formulated for waterproof bonding, suitable for interior and exterior woodworking.

Why does it expand?

Polyurethane adhesives expand slightly as they moisture-cure, which helps fill small gaps. Clamp the joint so the expansion does not push the parts apart.

Do I need to clamp it?

Yes, clamp or hold the joint while it cures, both for strength and to control the slight expansion.

How is it different from a PVA wood glue?

PU is waterproof and bonds a wider range of materials, but foams and needs clamping. PVA glues like our Duo (D3) and D4 Premium are cleaner for general joinery; choose PU when the joint must be fully waterproof.

Which size and colour?

The 750 g bottle is brown; the 300 ml sausage is clear. Both come single or as a trade box of 12.

How is it different from The Beast?

Both are moisture-cure PU. This one is aimed at wood bonding; The Beast is a general D4 PU that bonds wood, metal, stone, glass and more. Use The Beast for mixed materials.