sailboats for polypropylene page

I've new information about gluing Coroplast

After reading this page, Rick Webber, UK sent me the following email. Many thanks to Richard Webber for sharing.

Bonding Coroplas / Corex

Many years ago (2002) I was making and selling many SPAD aircraft kits and I had very little success with flashing and CA which was the recommended method at that time.

My solution was to contact an adhesive manufacturer in my local city and challenged them to bond some sample corex that I sent them.

Within two weeks they returned me a sample bottle of a CA they code named SF100 (Now available from 3M), along with my corex samples well and truly bonded, in fact one of the planes made back then with SF-100 is still flying today without any problems.

I, like you test the bonds to destruction and in all cases the corex surface was ripped to shreds with large chunks still bonded to the other test part.

The method used to create such a strong and lasting joint only requires the corex, (both parts), to be cleaned with methylated spirit and allowed to evaporate prior to putting spots of adhesive every half to three quarter inch onto one surface, place the two surfaces together and apply even pressure along the length of the join.

I am aware that 3m Scotch-Weld SF-100 is not a cheep adhesive but it really does the job as long as it is fresh and stored at low temperature out of direct sunlight.

Hope this is of interest


Testing Glues on polypropylene

My glue tests

NOTE: Although I did not test it personally, 3M Scotch-Weld SF-100 has been reported as completely successful, see letter at top of page. can supply it, I have a link on the side links. It is pricey and it works.