6.5.2 Bond Coat
The bond coat is applied to the existing surface and is a proportion of the binder fabric retention allowance. The balance of the fabric retention allowance is added to the seal coat on top of the fabric.
The bond coat must be sufficient to hold the fabric in place, without bleeding through the fabric and adhering to the tyres of the fabric spreading and rolling equipment.
Bond coat application rates typically vary between 0.4 and 0.8 L/m2 depending on surface texture and weather conditions. In warm to hot conditions, the top end of this application rate may lead to excessive application rates and binder pickup.