Waterproof adhesive - availability of BS EN specs on line ?

[robgraham]

I have a requirement for a waterproof glue and started to do a bit of googling about it. It seems that such glues comply with BS EN 204, but there are different gradings - I've seen D2, D3 and D4.

Being a bit of an anorak I wanted to see what these gradings meant but seem to have to be forced to buy a copy of the Standard at great expense. Does anyone know what applies for what would be near enough garden furniture - it's actually a beehive.

I was looking for the original Cascamite powder but that seems to have disappeared.

Thanks Rob

[Nightjar]

Cascamite is rated D3.

Colin Bignell

[polygonum]

But you don't want mites in hives. :-(

I have used this:

for various external uses. And quite like it. Certainly nicer to use than some other polyurethane adhesives. However there might be some reason NOT to use it on a hive.

[docholliday93]

It Would Be Easier To Read If They Formatted The Text A Bit Better, Wouldn't It...

[Andy Champ]

It _was_ a favourite of boat builders, many years ago. But AFAIK they've all gone to epoxy, or possibly polyurethane.

x-posted.

Andy

[Owain]

D1 interior, in which the moisture content of the wood does not exceed

15%

D2 interior, occasional short term exposure to water, moisture content of wood not exceed 18%

D3 interior frequent short term exposure to water, heavy exposure to high humidity. Exterior not exposed to weather.

D4 interior frequent long-term exposure to water. Exterior exposed to weather but with protection by an adequate surface coating.

Owain

[Peter Parry]

The BS EN 204 durability classes are explained here

[Reentrant]

I've assembled several (Thornes) beehives and never use glue. They just need nails for the box-joints. The bees will plug any gaps with propolis.

[John Walliker]

Go to your local library and read them free online.

John

[John Rumm]

If you have a library card number you can do it from anywhere - not just the library.

But having said that Owain has posted pretty much the only bit of the whole 10 page document that is actually worth having!

(there is a second table that adds some numbers):

Table 2 ? Minimum values of adhesive strength for thin boncMines Conditioning sequences Adhesive strength in N/mm' Durability classes Serial number Duration and condition D1 D2 D3 D4

1 7 days' in standard atmosphere >=10 >=10 >=10 >=10 2 7 days in standard atmosphere 3 h in water at (20±5)'C 7 days in standard atmosphere >=8 3 7 days in standard atmosphere 4 days in water at (20±5)'C >=2 >=4 4 7 days in standard atmosphere 4 days in water at (20±5)'C 7 days in standard atmosphere >=8 5 7 days in standard atmosphere 6 h in boiling water 2 h in water at (20±5)'C >=4

[Owain]

I summarised less than 10% of the work for review. ;-)

Owain

[robgraham]

Yes - agreed, but this is the roof. I don't like box joints because you do have to nail them and have done dovetails. Rob

[John Rumm]

Well between us, I guess we have reviewed it to the point of if now being redundant!