Fire and Emergency New Zealand received a call at 7.56am about a truck rolling and spilling 22 tonnes of carpet glue across Cavendish Drive, near State Highway 20.
Emergency services are currently attempting to block the drains at the motorway entrance to redirect the spill as the truck continues to leak.
The container at the rear of the truck could be seen flipped on its side with its wheels in the air as glue oozed onto the road.
At least a dozen people were responding to the scene, including several road workers in high-vis and police.
Emergency services are waiting on an Auckland Council clean-up crew which is estimated to arrive at about 10:30am.
Traffic is gridlocked for kilometres on the Southwestern Motorway around the scene of the glue spill.
Waka Kotahi confirmed heavy delays are expected as westbound lanes to SH20 are closed.
Police said diversions are in place and motorists are advised to avoid the area where possible.
Police confirmed there were no injuries.
