Too much die will slow or impede the setting of all resins like acra-glass. It dries darker than what it look like when you mix it. Try a hair drier to heat the mixture up slightly. It will get harder with extra heat. Red box is 4:1, green box is 1:1. For cracks I use the red (gel) with heat to get it thin and to get it to flow into the cracks better. Have not need to redo any yet.