Latest Sealant

[perryg114]

So what is the latest polyurethane sealant for use on the exterior. It use to be Trempro 635 but it is getting hard to find and might be discontinued.



Thanks


Perry

[Hans627]

Following!

[rugjenkins]

Curious also

[Bubba L]

I’ve Used MasterSeal NP1 polyurethane caulk since we got into Airstream renovations. Used it on everything except the exterior joints where we would use Parbond. NP1 is easier to find. I’ve used it in construction since the 70s. It has worked for me.

[Boxite]

This is an easy one: https://store.airstreamlife.com/blog...icky-subject-1

[NevadaGeo]

I just hit "Vulkem 116" on the search, Amazon came up with lots. Looks like TremPro has Vulkem now.

[richard5933]

Originally Posted by Boxite

This is an easy one: https://store.airstreamlife.com/blog...icky-subject-1

Funny - the two photos in the article show ParrBond, but it's not mentioned in the article as an option. I still use it on body seams and like the way it can be laid in a thin, narrow bead which sucks down and is hardly noticeable after it cures.

For larger areas, like over the windows and door, I used Vulkem.

On the roof around vents and such I used a self-leveling Dicor.

[perryg114]

Trempro 635 spec sheet



https://www.tremcosealants.com/files...Pro_635_DS.pdf


Vulkem 116 spec sheet


https://www.tremcosealants.com/marke...ts/vulkem-116/


116 is for porous surfaces and has some sort of solvent in it. It is slow to dry so it will pickup dirt and whatnot.



635 is faster drying and more suited to RV type applications and is solvent free.



116 might cause problems with rubber roof membranes which are no a problem on aluminum skin trailers.



There is some stuff called LEXEL that is clear and solvent based. It is real gummy but lasts a long time. LEXEL will probably disolve or swell rubber membrane roofs.



Perry

[10Smiles]

Good information.