can I repair this mattres, and if, how?

You can try a good hot iron. This will usually re-bond the glue. But, if there is any grit in there in will probably NOT work.

Return to seller???

Wouldn't spreading some glue from the patch kit over the holes work?

What brand is that looks maybe like a thermarest? Could that be a warranted repair?

its a no name thing bit older, no more warranty.
Could try a soldering iron, its at the seam, hard to patch.

Just use the textile glue that is sold with other pads. spread a liberal layer over the hole let it dry and repeat it 3 times. Im assuming it is not the actual seam that is ripped open.

If the seam is ripped open you could try sewing it to keep it together tightly and then applying the layers of glue on the inside of the two flaps to seal in the air.

I would try Aquaseal. It is a urethane glue made for such repairs. When it dries it retains elasticity which makes it ideal for inflatable repairs.

just deflate it and let dry, then use some seam grip. should hold just fine. I've repaired many garage sale, punctured/leaky pads like this. you can also use some gear tape, tape up that section, and spread seam grip around the edges of the tape if you're paranoid about it leaking again.

A regular iron would work. Soldering iron, depending on how adjustable, may just burn a hole through your fabric.

http://questoutfitters.com/tips_and_hints.htm#HEAT SEALABLE FABRICS

had a look again, its leaking just where the foam meets the seem, so if I was to use an iron, would have to melt the foam, won't work? Could try and put the seem grip on top. Its actually 3 punctures, guess from rolling it up. As they are next to that solid part for the valve, so would be kinks in the seam. Maybe its time for a new one.

The textile glue that comes with the pads is more than enough to repair that. Just put on three different coats letting one dry before the other is applied. and tht pad will work great.

…, the pad? Thats my worry, it won't stay?