can you apply this underwater please or is it best to empty the swimming pool first

The instructions say the surface to be stuck should be dry, so I don't think it would work if applied under water.

How many ml quantity of glue is the tube?

Depends if you buy the 40ml or the 330ml :)

Do i have to deflate my hottub first before applying

I didn’t, I applied it to the puncture from my finger under the water. However if you have a bad leak you might need to deflate it.

Would this be suitable for a paddle board with 15psi?

I have used it for my inflatable kayak and has worked perfectly, for a paddle board maybe use a patch as well

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🛠️ Patch it like a pro, stay afloat like a boss!

UNIVERSAL FIX ALL - One kit to repair tents, airbeds, trampolines, hot tubs, and more—your go-to for every PVC emergency.
EFFORTLESS APPLICATION - No special skills needed—quick, mess-free repairs that get you back on the water or poolside faster.
INSTANT PUNCTURE SAVIOR - Seamlessly seals tears, cracks, and holes on boats, kayaks, and inflatables with a pro-grade liquid PVC formula.
LONG LASTING DURABILITY - UV-resistant formula ensures your repairs withstand sun exposure and time, keeping your gear adventure-ready.
BUILT FOR HARSH CONDITIONS - Flexible, chemical-resistant, and fully waterproof—perfect for fresh or saltwater environments, even underwater.

Dr.Boat Heavy Duty Repair Kit features a 40ML liquid PVC glue that provides a waterproof, UV and saltwater-resistant seal for quick, durable repairs on boats, kayaks, tents, inflatables, pools, and hot tubs—usable even underwater without draining.

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RM123

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Malaysiastore

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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Product Dimensions	39.88 x 39.88 x 11.99 cm; 40 g
Part number	1
Item display weight	40 g
Material type	PVC
Item volume	40 Millilitres
Department	Unisex-Adult
Manufacturer	Dr.Boat
Item model number	Dr.Boat
ASIN	B09DL4X7MR

Dr Boat Heavy Duty Repair Kit for Boat Kayak, Canoe, Tent, Inflatables, Swimming Pool, Hot Tub - LIQUID PATCH Resistant to Fresh and Salt Water UV-Resistant Long-lasting - 40ML

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