Extramite / Cascamite

[Guest]

A local chandler has recommended Extramite One Shot glue for use on a dinghy I am building. However, the label says the glue is suitable for “general joinery and cabinet work”; there is no mention of boat building or even being waterproof.

Is Extramite suitable for this purpose? Is it a direct re-branding of Cascamite or has the formulation being changed?


Chris

 

[jon]

As far as I know extramite is cascamite and an excellent glue but only water resistant. Use cascophen which is great and water proof, however it will give you a dark glue line and do not use below 50 degrees F as chemical reaction does not take place, hope this helps!

 

[aztec]

do you know where you can get it from, is it a chandlery job or would B&Q stock it?

 

[jon]

It would be great if B&Q stocked it but seriously try your local chandlery or come back to me if you have no luck.

 

[bob_tyler]

Have a look at the Aqua Marine site:- www.aqua-marine.co.uk/acatalog/Aqua_Marine_Website__Glues___Sealants_62.html

 

[oldharry]

DONT USE Cascamite or anything like it!

Many early plywood boats were built using Cascamite or Aerolite, and their derivatives. Boats built with these glues ALWAYS fail eventually, however carefully they are maintained, as the glue joints begin to give way. Repair is virtually impossible without a huge amount of work. This is why old plywood boats (which in the 60's and 70's were nearly always built using these glues) are such a bad bet, and are so rarely seen nowadays!

Nowadays if the glue is not SPECIFICALLY RECOMMENDED by its makers for boat building then it is unsuitable and must not be used. The DIY superstores very rarely stock glues suitable for marine use, and their in store advisors do not have the specialist knowledge to advise you (unless they happen to be boat owners as well!)

There is a good range of modern adhesives for boat building, and the type required depends on which part of the boat you are building, the timber you are using, and the building conditions (e.g. temporature and humidity ranges).

Different types for different parts? Simply, the strongest glues are very expensive, and a cheaper product (perhaps 70% saving) can be entirely adequate for many parts.

The Current edition of 'Sailing Today' carries an excellent article spelling it all out, together with brand names, cost, and suppliers. This excellent article will enable you to choose the correct adhesives for your project.

 

[Guest]

I have found polyurathene very good, thin for tight joints and thick if you need some filling. Trade name Botcon for the thin is hard to get hold of but easy to use and not to expensive as it goes a long way. Thick stuff from sickaflex but remember this is more fillerthan glue! if it needs to be strong & thick I go to west epoxy and bought the dispenser kit which gets the mix right and saved its cost in the first pack on reduced wastage. This saw me though my fist classic restoration and I plan to do the same for my second.

Roly, Voya Con Dios, Glasson, Lancaster

 

[ccscott49]

I think cascamite was a two part product, but any glue which is not waterproof is no good for boats! Epoxy! the best all round glue for wood, but it does break down at temps. over 100 c, so dont boil your boat!

 

[bedouin]

Re: Don\'t want to promote the opposition...

but there is an excellent article in Sailing Today this month about the various types of glue available. Definitely an eye-openner for me - my last serious foray into this area was back in the Cascamite / Aerolite days

 

[Guest]

Use Balcotan Rapid...

It's the business and not too expensive. Again see Sailing Today for the full story on glue!