McNett Seamgrip Seam Sealant

Excellent product for seam sealing and patching. I primarily bought this to apply a patch to a significant patch for my nylon tent and after 24 hours it made a good solid bond which dried perfectly clear whle remaining flexible. I had some stitching to support the tear and used this to seal the stitching afterwards. I personally tried thinning it with white spirit to pentrate the stitching better but still found it very thick though it worked well. I found it a bit sticky for seam sealing though it was very effective. Bonding and grip was excellent. Tubes just a bit small for a major repair (hopefully a rare event for any camper) and quite expensive - I would have liked to be able to but a larger tube size despite cost. Primary lesson is not to rip my tent so badly next time! Excellent for restoring the seams in a worn out old tent.

Worked great for sealing the seams on my motorcycle trousers. Its like a gel and just spread it on with the supplied brush. Cheers

I bought 2 tubes to reseal and MSR Elixir 3, which had deteriorated flaking seam tape. I applied (purposely) to the outside of the tent, which may not be as aesthetically pleasing but beats spending hours trying to remove all the old seam tape. Annoyingly one tube was about a third cured before even breaking the seal, so only had about 2/3 usable sealant. I applied with a small syringe and a brush rather than the enclosed brush/ cap thingy, as from previous experience they make too much of a mess. The glue seemed thicker than when I have used it before and became quite tacky quickly on a 25c day making it a little difficult to get on. Second tube was better but still a little thick in consistancy. Apparently you can thin this a bit with acetone, but I didn't bother. Check out Dose Of Dirt on YouTube for Your Tent Is Not Waterproof and TheOutdoorGearReview for his seam sealing tips. And as per GearAids advice allow to dry fully then coat in talc to stop it sticking to itself when packed away. Oh and you're supposed to apply to the inside of the tent

Can be a tad messy to apply and I could have done with the longer brush that's pictured. Mine didn't come with that. I ended up removing the nozzle brush and using that as a small 'paintbrush' to apply it. This worked well. I ended up leaving mine to dry overnight as it was still tacky several hours later but it was worth it and it dried to a really good 'rubbery' type finish which I've no doubt is watertight. Can't comment on exactly how waterproof it yet as I haven't been out in the tent yet but when I do, I'll try and update/add to this review. So far though, a great product and I'll be carrying the spare tube with me in the mountains for on the spot repairs of clothes and rucksacks. Great stuff.

The best and only seam sealant I will use. Second to none. Absolutely the right stuff to use to seal the inside outer of a tent. I've also used it successfully to repair my thermarest and to waterproof stitched repairs on outdoor kit.

More than enough for most repairs. In particular where the glue on seams has failed over time. 1. Compared to the cost of replacing a jacket for example, its very cheap. 2. Comes with a small brush to apply. 3. Don't do it all in one go, apply bit by bit. It takes longer, but when you have a 3 dimensional shape, go slowly 4. Think about applying to the tape, or to the jacket. In some cases the tape is easier 5. You might need to weigh it down to keep things flat. Use a flat bottom glass, remove after it has tacked up 6. Make a plan up front how you are going to glue. Centre outwards in my view is better. Which layers first 7. You can probably see the old glue as a guide as to where you need to apply it. 8. It's probably illegal to sniff the glue! :-)

Scum..AVOID

Excellent product but really disappointed to find it's gone solid in the tube. Bought in April 2025, only a tiny bit used, the air excluded. It's stored in a drawer in the house, which should be ideal. Expensive stuff for so little use.

Ha svolto adeguatamente il suo dovere sigillando le cuciture di una tenda da tetto. Ora dall'interno non ci sono più infiltrazioni date dai fili

Muy buena calidad y duradero

Nachdem meine sich selbst aufblasende Isomatte am Ventil undicht geworden ist, wurde in einem Blog auf das McNett Seamgrip hingewiesen, womit man den Fehler angeblich leicht reparieren kann. Und ja, ich kann das absolut bestätigen. Aber nun mehr zum Produkt: Seamgrip ist ein selbsthärtender Kleber auf Polyurethan-Basis, welcher Risse, Löcher oder undichte Nähte einfach abdichten kann. Die Dämpfe sind laut Produktbeschreibung nicht unbedenklich, daher sollte man an einem gelüfteten Ort arbeiten. Der Kleber riecht für mich aber nicht Kleber-untypisch sondern so ähnlich wie Pattex. Mit der Tube wird ein Einmalhandschuh und ein aufschraubbarer Bürstenkopf mitgeliefert. Ob der Bürstenkopf nach einmaliger Anwendung noch vernünftig gereinigt werden kann, weiß ich nicht. Ich habe ihn eh nicht gebraucht. Zunächst soll die zu behandelnde Stelle z.B. mit Isopropanol entfettet werden - das habe ich mir in meinem Fall gespart.Danach wird der Kleber darauf verteilt und kann mit dem Finger mit Handschuh verstrichen werden. Der Kleber hat wirklich Pattex-Konsistenz, daher stelle ich es mir eher schwierig vor bei dem abdichten von Nähten eine schön dünne, gleichmässige Schicht zu bekommen. In meinem Fall hab ich eine 1-2 mm dicke Schicht aufgebracht und habe die Isomatte über Nacht trocknen lassen. Trockenzeit sind 8-12 Stunden, aber ich würde eher einen ganzen Tag warten. Danach war die Stelle absolut dicht und der getrocknete Kleber verbleibt gummiartig flexibel. Für den Fall (z.B. bei Nähten), dass später Kleberfläche auf Kleberfläche gefaltet werden könnte, empfiehlt der Hersteller die Oberfläche nach dem Trocknen mit ein wenig Talkumpuder zu bestreuen, weil die Kleberoberflächen sonst aneinander haften würden. Top Produkt für Reparaturen im Camping/Outdoorbereich. Wobei man natürlich die 12 Stunden Trockenzeit berücksichtigen muss.

Les produits de ce genre sont très efficaces bien plus que n'importe quoi d'autre. Une fois collé, ça ne bougera plus jamais. Mais il faut attendre au moins un jour de séchage complet.

J'avais une déchirure qui commençait à apparaitre sur le mesh de mes chaussures de trail, j'ai cherché sur internet comment faire pour la réparer et je suis tombé sur la vidéo d'un gars qui expliquait comment faire pour réparer une chaussure de trail en utilisant cette colle. Ça laisse une légère trace (en fonction de la couleur du mesh) mais la réparation est excellente, il n'y aucune chance que la déchirure s'agrandisse. J'en ai même profité pour renforcer certaines parties qui risquaient aussi de se déchirer à termes.