System 20 National Rule Standard Hardener is compatible with both System 20 National Rule Primers and System 20 National Rule Clearcoats. The end result: An easy-to-use system with less products to stock.
Product Features:
Compatible with 4:1 System 20 National Rule Primers
Compatible with 4:1 and 2:1 System 20 National Rule Clearcoats
Ideal for larger repairs
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