3M 5200 adhesive/sealant question.....

[D. Stump, Hanalei]

I'm in the process of building a new 8' pram to serve as tender for Hanalei, and I am using 3M's 5200 adhesive sealant to bed all plywood to oak joints. I've built this same pram at least 5 times over the years and have always used an aliphatic(sp) resin glue to hold her together. Not being faimiliar with the 5200, the question is, how much of it do you use to assure a strong waterproof joint? Just enough to squeeze out a little when the fasteners are tightened or leave the fastners loose so a small amount of space is filled with 5200(then tighten the fastners after 5200 cures), or what? Just so you know, the frame is all white oak, the bow/stern are 1/2" Marine fir plywood, and the bottom/sides are 1/4" Marine fir plywood.

Would appreciate any comments or suggestions or experiences you have with 5200. Thanks in advance....

Dave Stump
Captain Commanding
s/v Hanalei (CD-30)

[cyrus jordan]

I have built only one boat, a 13' peapod, from plans bought from Wooden Boat. I used West System epoxy for the project. The West System is very straight forward to use. The epoxy is forever. The various additives permit one to make the resin as thick or thin as needed; the additives allow you to make an easily sanded fairing surface or an indestructable bond. I've never used 5200 as glue.



cjordan@together.net

[Lyn Heiges]

I'm in the process of building a new 8' pram to serve as tender for Hanalei, and I am using 3M's 5200 adhesive sealant to bed all plywood to oak joints. I've built this same pram at least 5 times over the years and have always used an aliphatic(sp) resin glue to hold her together. Not being faimiliar with the 5200, the question is, how much of it do you use to assure a strong waterproof joint? Just enough to squeeze out a little when the fasteners are tightened or leave the fastners loose so a small amount of space is filled with 5200(then tighten the fastners after 5200 cures), or what? Just so you know, the frame is all white oak, the bow/stern are 1/2" Marine fir plywood, and the bottom/sides are 1/4" Marine fir plywood.

Would appreciate any comments or suggestions or experiences you have with 5200. Thanks in advance....

Dave Stump
Captain Commanding
s/v Hanalei (CD-30)

Dave,

I have used a lot of 3M 5200 and it is great stuff! I have used it primarily for bedding things for 20-years, however I have used it in below waterline with good success. MY recommendation is to call 3M Marine Products Department at 651-736-7988 and get THEIR RECOMMENDATIONS! 3M is a great company and I have many personal friends all over the nation within the organization, but NOT in the Marine Products Department.

By MY experience, I would recommend put the 5200 in the joints, screw them down and wipe off the excess. There IS a special 3M 5200 Solvent which you can purchase to really finish the joints nicely soon after you have screwed the pieces together. Don't use TOO much as it will seep and can ruin your seal, but used with common sense allows a great looking edge at the joint.

Best Wishes on your venture!

Lyn Heiges
CD28 MOON CHILD



lheiges@compuserve.com

[Carl Jones]

I'm in the process of building a new 8' pram to serve as tender for Hanalei, and I am using 3M's 5200 adhesive sealant to bed all plywood to oak joints. I've built this same pram at least 5 times over the years and have always used an aliphatic(sp) resin glue to hold her together. Not being faimiliar with the 5200, the question is, how much of it do you use to assure a strong waterproof joint? Just enough to squeeze out a little when the fasteners are tightened or leave the fastners loose so a small amount of space is filled with 5200(then tighten the fastners after 5200 cures), or what? Just so you know, the frame is all white oak, the bow/stern are 1/2" Marine fir plywood, and the bottom/sides are 1/4" Marine fir plywood.

Would appreciate any comments or suggestions or experiences you have with 5200. Thanks in advance....

Dave Stump
Captain Commanding
s/v Hanalei (CD-30)

I've used a lot of it on my previous wooden boat. Put enough gook between the joints so that it squeezes out evenly when screwed down. Wipe it off and that's it. Pray you don't have to take it apart again.



GreatCells@aol.com