密封剂

例句：

1. 1. The glueholds the pieces together perfectly.
   胶水把这些碎片粘得非常完美。
2. 2. The sealer is used to protectthe wood from moisture.
   密封剂用来保护木材免受湿气侵蚀。
3. 3. Theadhesive was strong enough tohold the two pieces together.
   粘合剂足够强，能把这两片材料粘在一起。