During the application it’s necessary to measure the wet film thickness (WFT) frequently, with a wet film thickness gauge.
To determine dry film thickness (DFT) based on the wet film thickness (WTF), it’s necessary multiply the WFT for a specific number, different products by products. For the Promat product range the value is between 0,68 and 0,7 (see specific product data sheet [link to product data sheets] for more information).
The maximum thickness that can be applied for each coat vary product by product (see specific product data sheet[link to product data sheets]) as well as the related consumption (TSR: theoretical spread rate).
After sufficient drying time a survey of the dry film thickness should be carried out using a suitable calibrated gauge. An electromagnetic induction instrument with a statistical function to store readings and give an average is most useful. Where dry film readings include a primer and/or topcoat an allowance must be made for these coatings and subtracted from the total reading.