◆	Make sure that everyone working with Crack Dexpan understands the possibility of blowouts, and has read the technical instructions thoroughly.
◆	Crack Dexpan is a highly alkaline product, pH reaches 13 after contact with water and can cause severe irritation to mucous membranes, especially eyes. Skin and eye contacts with Crack Dexpan must be rinsed off with large amounts of cold water immediately without rubbing. Consult a doctor quickly.
◆	Wear safety goggles and rubber gloves during Crack Dexpan handling, mixing and filling. Dust-proof mask is recommended in poorly ventilated areas such as tunnels or mines.
◆	Plug the holes immediately after filling and cover the holes with straw mat. Keep your face away from the holes filled by mortar. Stay away from filled holes at least 3 hours after filling to avoid blow-out shot. Keep people away from job site after filling .
◆	Warm or bubbling mortar is forbidden to fill into holes. Once filled holes start to smoke or steam, that is the sign they may be about to blow out. Clear the area of people immediately.
◆	Keep people away from jobsite after filling holes. In case of people have to remain in the area, cover filled holes with a tarpaulin.
◆	Take care of fall of cracked block from the cracking object .