Purpose undercoat, Exceptional filling capabilities, it is a rapd drying and easy sanding. High topcoat holdout Max Meyer 1.856.4024 HS 2K Topfiller Exceptional Filling Capabilities, it is rapid, easy sanding and has a high topcoat Is a multipurpose undercoat and can be used for overall or spot repairs Replaced 1.856.3011 Detailed Description Max Meyer 2k High Build 4024 Grey Primer Filler HS Top Filler 2 Litres Car Body, Multi Purpose undercoat, Exceptional filling capabilities, it is a rapd drying and easy sanding. High topcoat holdout A new, extremely high-solid 2K acrylic primer, with simple and error proof 4:1:1 mixing ratio that provides high build on vertical applications, is extremely easy to sand and gives good final appearance. It�s fast flash-off and drying times makes it suitable for air-drying and poorer shop conditions. Maxi-Build 4:1 Primers are a range of high structured 2K primers optimised for high build spot repairs & panel repairs in the refinish bodyshop. Maxi-Build 4:1 has outstanding sag resistance, fast flash off & drying. The Maxi-Build 4:1 range sand well & give good final gloss & appearance after application of topcoat. Maxi-Build 4:1 primer can be used over a wide range of substrates such as sound original paintwork, etch primed bare steel, & polyester body fillers. To be used in conjunction with Max Myer 6000/8000 hardeners and 4310 thinner.