Gwen used the lid of the iron bucket to seal the upper opening of the iron bucket.

"Okay."

Gwen clapped her hands: "It's done. After stewing for about three to five days, these wood will become charcoal."

"Wood tar is a by-product of the incineration process."

"During the simmering process, someone needs to cool down the iron sheet above from time to time."

Saying that, Gwen looked at Chen Lang and Chen Lang.

"I'm coming!"

Lehman did its part.

"Okay. Just remember to cool down once a day."

......

Three days later.

A large glass of liquid with clear upper and lower layers is completed.

"This is the crude wood vinegar solution that has been left to clarify."

Gwen pointed to the liquid in the cup and said.

Chen Lang and Lei Man on the other side looked confused.

It is a blind spot of knowledge.

"The upper part of the crude wood vinegar is the clarified wood vinegar, and the main ingredients are acetic acid, acetone, methanol, etc."

"The lower part is the precipitated wood tar we need. The main ingredients are turpentine, creosote and asphalt."

As a liberal arts student.

The only thing Chen Lang could do at the moment was nod his head.

Gwen carefully poured out the upper part of the clarified wood vinegar and handed the remaining precipitated wood tar to Chen Lang.

When Chen Lang got the wood tar, he felt a little unsure.

Can this thing be a perfect substitute for tung oil?

Gwen didn't care about Chen Lang.

She will continue to extract wood tar.

These are only enough for Chen Lang to sew.

If you want to paint a layer of wood tar on the surface of the boat, you need more.

......

Chen Lang, who got the wood tar, started making adhesives.

The materials for adhesives are simple and there are only three types.

Wood tar, ramie fiber, lime.

Chen Lang first piled wood tar into lime.

Stir constantly.

Keep stirring until the two are completely combined.

This stirring process lasted for half a day.

Afternoon.

Chen Lang began to mix ramie fiber into the putty lime.

This process is extremely time-consuming.

In order to avoid being wasted.

Chen Lang called Lehman for help.

The two of them banged and stirred with wooden sticks.

Ramie fiber is produced through the continuous efforts of the two people.

Slowly mix in the putty lime.

It will eventually form a paste.

This black paste is the adhesive that ensures the boat is watertight.

In the live broadcast room.

The civil engineering brothers captured the barrage.

【Isn’t this thing just gray?】

[Indeed, it looks like gray with ink]

[The effect is similar, it should be waterproof]

[This is a shipbuilding method commonly used by fishermen on the southeast coast]

[I used tung oil, ramie fiber, and lime. Brother Zuoshi is pretty strong and found a substitute for tung oil]

......

On a small island.

Chen Lang will mix the adhesive.

He called Gwen and started applying adhesive to the inside of the sampan.

Chen Lang holds a stone hammer.

Use a dagger to pick up the adhesive.

Apply into the gaps in the wood.

At the same time, Chen Lang waved the hammer.

Use a dagger to get the adhesive into the gaps little by little.

Gwen looked at it for a while and then understood the principle of this method.

She started to help.

With the continuous cooperation between the two.

Enough adhesive is applied into the gaps of each board.

Chen Lang moved the glued sampan to the beach.

After drying overnight.

These adhesives will solidify.

The most important part of the waterproofing work is now completed.

"How many days?"

In the shelter.

Gwen suddenly asked Chen Lang.

Chen Lang opened his notebook: "Day 62."

"62 days...so long."

It’s been a long time indeed.

Chen Lang writes his diary in his notebook with charcoal pen.

While writing, Chen Lang recalled the last time he had contact with the program team.

Director Lu Yuan said that his mother has received treatment.

Who paid for it?

Your own relatives?

Impossible, absolutely impossible.

Dad's side is sparsely populated, with almost no close relatives.

And after my father passed away.

All relatives on my father’s side have lost contact.

Could it be his uncle?

My uncle was very rich before.

But as the popularity of diving has passed, the club's income has declined day by day.

Finally closed down.
To be continued...