334/4LTR & 725/1LTR PRIMER KITHigh quality acrylic – filling, sealing primer for partial and full automotive refinishes. Suitable for original or old paint work and ideal for unsanded O.E.M. (E-COAT) panels. Its versatility enables both application at normal, medium and high film thickness with intermediate sanding or “wet on wet” application with an isocyanate based H 729 Hardener for Primers NORMAL / FAST. Dues to its high filling power and vertical stability, higher film thickness is possible. The fast drying and excellent levelling of this primer guarantee efficient application and fast sanding. It is cured with an isocyanate based H 725 Hardener for Primers FAST / SLOW. One of its greatest advantages is that it is ready for sanding after 2-3 hours air dry at 23 ºC (73ºF).H 725 Hardener for Primers FAST / SLOW is an isocyanate hardener for 2K primers only. Available in transparent yellow colour.