I will add this as an alternative surface form in the "固形 （こけい） (n,adj-no) solid (body)" entry (1266590).

See below.

It was in the text which I was reading as "固型冷却剤". You have the latter 3 kanji in the dictionary as follows:-

冷却剤 【れいきゃくざい】 (n) coolant; refrigerant

In context, a solid coolant makes sense.

The above promotion gets some 800k Google hits and the same meaning is confirmed by some on-line dictionaries like Weblio.

You also have similar usage for "固型" in the following entries:-

固型材 【こけいざい】 (n) solid material; WI1
固型遅延剤の投薬 【こけいちえんざいのとうやく】 solid retardant dosing; RW
固型脳 【？】 solid brain; WI2

I am  not sure whether any wider combinations should be included [unless "solid brain" is an idiom!], but it may help to have the "solid" as a prefix which can be attached to some other existing entries in the main dictionary.

Perhaps, if you include the above, it could be cross-linked to "固形" which has many more Google hits into the millions.