Common problems and solutions

The seam ripples or warps

Possible cause: The pieces were glued under tension and changed shape as they relaxed.

Solution: Position both pieces without tension. If needed, stretch them gently until they lie flat and relaxed.

The bond does not hold

Possible cause: The adhesive was not aired long enough or the surfaces were not clean.

Solution: Degrease the surfaces carefully. Apply a thin, even layer to both sides and let it air for 5-10 minutes until matte before pressing.

Air bubbles in the seam

Possible cause: The pieces were joined too quickly over too large an area.

Solution: Start at one side and join the pieces gradually with the seam roller, pushing air outwards.

The seam breaks under load

Possible cause: The wrong adhesive was used or the bonding surface is too narrow.

Solution: Use vulcanising latex adhesive and plan for at least 5 mm of bonding surface.