Hardeners are used as a catalyst in Standard Clear. It also insures durability and helps achieve a high gloss.
***Suggested types***
Standard (DH14) - below 70 degrees F
Slow (DH16) - 70-85 degrees F.
Super Slow (DH18) - above 85 degrees F.
Available in 8 oz, 16 oz, 32 oz, and gallon.