Final answer:
Thermo gel can generally be rehydrated by applying water over it, but its effectiveness depends on the product and exposure time. Manufacturer's instructions should be followed for best results. If the gel is too dried out, reapplication may be necessary.
Step-by-step explanation:
If thermo gel dries out before the fire approaches and needs to be reactivated (rehydrated), it generally can be done by applying water over it. However, the effectiveness of rehydration depends on the specific product and the amount of time it has been exposed to the elements. It's important to check the manufacturer's instructions for proper reapplication or rehydration procedures. In cases where the gel has completely dried to a point where rehydration is ineffective, it might be necessary to reapply a new layer of gel.
Most thermo gels are designed to absorb water and retain it to form a protective barrier against fire. If the gel dries out, that protective quality is compromised. To ensure the gel serves its purpose, it's essential to monitor it during extended periods of high-risk fire conditions and maintain its moisture level as recommended by the manufacturer.