Attaching saildrive fairing with Bostik 2402

[yotter]

I am planning to attach the rubber fairing to the outside of the hull for my VP130S (its been out for new Diaphram). I have the recommended Bostik 2402 2 part contact adhesive. The temperature is only forcast to be 5 to 7 C max. Does anyone have any experience of using this adhesive in low temperatures (I have seen 15 C quoted as minimum temperature). Perhaps a carefully used hot air gun may help?

Any advice apprechiated (hopefully).

Angus

 

[VicS]

Refer to the product data sheet which says:

BONDING
NOTE: Bostik 2402 should not be used during
abnormal atmospheric conditions:
A) If ambient temperature falls below 10ºC, a
moisture film may form on the adhesive surface.
Should this situation occur, no further bonding
should be carried out until temperature has
risen.
B) If ambient temperature rises above 35ºC the
open time for the bonding operation will be
shortened dramatically and the resulting bond
strength will be affected.
C) On days of high humidity (above 70% RH),
bonding operations should be watched closely
for fall off in initial "grab" qualities of the
adhesive films. Should any lack of grab be
evident the bonding operations should cease
until normal conditions prevail.

 

[yotter]

Vic,
Many thanks for that, humidity above 70% in Scotland, unheard of! The weekend looks drier with the wind going to the North West, which should help. I may run a test on some other material first so see how long it takes to bo tacky.
Many thanks

(I should point out that I am very fortunate to be able to walk a short distance from home to the boat)

 

[TSB240]

I used it on our boats fairing flap some 5 years ago,.
It is till stuck despite being glued on a very cold very damp day in March in Wales.
I dried out alongside a wall so less than 6 hours out of the water.
I just made sure the hull GRP surface was well prepared , dried off by stealing the admirals hair dryer, final clean with acetone.
Hope this gives you some reassurance.
Steve.

 

[Halo]

Ideally wait for the right weather.
I got away with conditions like yours by chosing the best available day and
- Screening the area from the wind ( lowered a rope under the boat from the guard rails eilther side , strung a heavy cloth over it , pulled tight and tied to seal around underside of boat and the weighted it down to stop breeze)
- having a radiant heater (halogen) on its back warming the area for ages before starting
- having the boat heater on for ages before starting
- warming the Bostick and the fairing before use

 

[yotter]

Steve and Halo,
Many thanks, Steve you have reassured me
I plan to use a radiant heater, its an old halogen 500W flood light. Will also warm the Bostik and fairing. I have acetone ready and have already abraded both surfaces. I would ideally wait for warm weather but plan to launch this weekend (not sailing till next month perhaps?). I think once its stuck, its waterproof pretty well straight away, but would prefer a time gap.
Best regards
Angus

 

[TSB240]

Steve and Halo,
Many thanks, Steve you have reassured me
I plan to use a radiant heater, its an old halogen 500W flood light. Will also warm the Bostik and fairing. I have acetone ready and have already abraded both surfaces. I would ideally wait for warm weather but plan to launch this weekend (not sailing till next month perhaps?). I think once its stuck, its waterproof pretty well straight away, but would prefer a time gap.
Best regards
Angus

I am sure I remember either reading or asking the techies and it was confirmed that the adhesive bond will continue to improve with time. It is not dependent on air setting so immersion soon after replacement would not be an issue.

 

[tross]

If I may, i would like to offer a small tip. Lightly sand the hull and the the rubber fairing to give the glue something to bind on - this was the recommedation that came the the glue I bought. I als, once it had been stuck down put a filet of sealer ( or what ever you use) around the edge of the joint to prevent the water getting inbetween the fairing and the hull and lifting it off.

 

[yotter]

Tross,
I have been in with an abrasive wheel and will do final clean with acetone. Rubber also sanded with 80 grit. I like your idea of a filet of sealer, it cannot do any harm. Sikiflex 291 may be a good choice. I had considered using 291 to bond the fairing but by neighbour in the marina boat park recommended the Bostik 2402 and he was a marine engineer (although on super tankers, so no sail drives), VP recommend contact adhesive also. Hopefully less sleet in the next day or two, planning on splashing Saturday or Sunday.
Angus

 

[duncan99210]

I’ve been using whatever locally available variety of sikaflex is available to stick mine in place. Tried using contact adhesive and found it didn’t work well but the sealant/adhesive type did. Clean surfaces well before bonding and the trouble tends to be removing the thing when needed rather than it coming adrift.