But, then cellotape doesn't stick well with biofoam. I have a hard time sticking it, it gives away too easily. Might be good for small gliders but what about big planes?

Am I wrong here? Please correct me.

Use Wonder555 cellotape available in Kolkata, not any other brand. You can take 2" Roll from Gitadi (Tomorrow afternoon onwards). You are perhaps using Fighter make. Those bonding are much inferior than Wonder-555 make(flooded in Kolkata Supply).

Another trick (I don't know this is right or wrong)
Clear dust by brush first and then by vacuum cleaner if possible. Now apply one layer and peel off which will take the last trace of dust. Now Apply another 2nd layer (by method second but by position first as initial layer is nothing but garbage after peeling off which takes away sanded particles too) and press gently with hand to strengthen more by more bonding but keep in mind that the micro-bubbles does not crack and attach with cello-tape.

I think it should work.

Found a source in Doha   QR6.5 per 50ml tube.

Hi Guys,
RE: PU30 (Polyurethane 30 minute) SEA WATER PROOF ADHESIVE

I dont know if this is available in India or no but if you can do some research and enlighten others it will be great....

AMAZING STUFF THIS, AND SO LIGHT IN WEIGHT TOO...This adhesive is waterproof and expands 3 times its size. Once stuck, its impossible to seperate the joint.
Fantastic substitute to hotmelt glue as its so light weight and can be sanded and painted over too. Perfect for gapfiller jobs where any cavities need filling or repair jobs where the motormount has been pulled off in a crash. To use as filler, I normally mix it with fine sawdust and spray a little water over the applied area and watch it expand. I needed to fill a small gap in a veneered oak door recently. Used PU 30 mixed with moist sawdust and guess what it went inside the door and expanded so much that the entire area affected bulged up, (ruined all my efforts as I used too much)..... so what?? Guess I have to start all aver again..lol
I have been using it for all my EPP, DEPRON and BALSA projects in hobby and woodwork around home.
Its is most commonly used by all carpet fitters for sticking carpet gripper rods on to concrete floors where no drilling or nailing is allowed. It sets in approx 30 to 40 minutes but fully cures overnight. This stuff is so strong that you have to use bolster / chiesel to remove a 24 hour cured gripper rod..... BTW for those unaware of the term "Gripper Rod" ; its 5ml thick 1 inch wide x 48 inch long  ply wood strip with loads of nails sticking out to hold carpet in place.

I am attaching some images of my recent project "FORMOSA 2" by GWS. As this polystyrene / thermocol plane was covered in packaging tape, the nose needed a lot of weight to get the C&G correct. I used PU 30 to stick a pcs of blue foam to bring the bulkhead forward and made a motormount using loads of layers of  white "FOAMBOARD" from signboard manufacturers. Now the problem is GWS supply a flimsy cowl which is thinner than an icecream cup... I guess I have to visit an air show or a swap meet and see if I can pick up a suitable cowl.

 This glue comes under different names but here is a link of its famous brand "GORILLA" You see like we all are used to calling toothpastes  "COLGATE", Vacuum cleaners "HOOVER" and washing powders"SURF", this product is also known by its most advertised and promoted manufacturer "Gorilla". Here is a link if any of you wants to order from Amazon;

http://www.amazon.co.uk/Gorilla-Glue-1044400-115ml/dp/B001W030E0/ref=cm_cr_pr_product_top  

Product Description:
Manufacturer's Description
Gorilla Glue is the preferred choice for repair jobs and tough building due to its sticking power and open working time. It is a versatile glue ideal for most household fixes and building repairs, indoors or out. It is 100% waterproof and won't breakdown when exposed to moisture. It is temperature resistant and therefore unaffected by extreme heat or cold. In case of a glue line, finishing is easy as the line is paintable, stainable and sandable. Gorilla Glue offers more coverage as the glue foams to 3 times it's size.
Product Description
Gorilla Glue Gorilla Glue 115 ml GRGGG115


Gorilla Glue is a polyurethane glue. When exposed to moisture the adhesive reacts and creates a foaming action that fills whilst it sticks. Gorilla Glue has an open working time of 20 minutes. The glue is brown in colour, but when dry it dries a tan colour, and is totally waterproof. Gorilla Glue is incredibly strong, bonding all types of wood, including pressure treated wood. Gorilla Glue also bonds stone, metal, ceramics, foam, glass, leather and more. Once dried the product is sandable, stainable, paintable and can also take a varnish. Due to its foaming action the Glue gives greater coverage, so will give 3 times the coverage of other glues. The glue is unaffected by extreme hot and cold, and will not break down when exposed to rain and snow.


Gorilla Glue, get the job done right for the first time- every time. Originally used as a commercial adhesive for hard-to-glue materials. Once something is glued it will not come undone- it is set to survive years after the repair.

The Gorilla Glue formula bonds materials that typical all-purpose adhesives will not hold, including wood, stone, metal ceramics, glass, foam and more. And even better - it bonds dissimilar materials.

It is waterproof and temperature resistant, which means it can be used for projects and repairs indoors or out.

Size 115ml



http://www.raygrahams.com/catalog/product_info.php?cPath=&products_id=4714  


Bond It PU30 PU Brown Wood Glue 1L    [BDAPU30]  £12.46 (Inc.VAT)  

PU30 PU Brown Wood Glue 1L

One-part moisture cure polyurethane adhesives specially formulated for waterproofing bonding. These products are seawater proof and are resistant to acid and chemicals. Conforms to BS EN 204 (class D4). A solvent-free, rapid setting liquid setting liquid PU adhesive which sets in 30 minutes.

Excellent bonding properties suitable for all wood products including garden furniture, staircases, boats, sandwich panels and insulation materials to most common substrates. Suitable for interior and exterior applications.

When Ordering Quote RGL Code (BDAPU30)

Like to share a source for adhesives (address below) dealer for Araldite, Loctite, anabond, 3M, dentrite, Metlok, spray paint cans etc etc..
   
Address: Zenith Industrial supplies
    174/2 SP road
    Bangalore-560 002
    email: zenithblr@airtelmail.in
    web: www.zenithindustrialsupplies.com
    phone: 080-22237208,22219659, 41140454

Hope this address helps.

Got Loctite 242 (med strength - 50ml) - Rs.350; Araldite Klear - 5 min setting 90gm - Rs.140

Foam safe CA is available in India , you can get Loctite 460, 408,403.
The only thing is it is very expensive RS.1330/- for 20 ml bottle. I would
Suggest getting Evotite 460 from hobby king bat  RS 200/-.

Subir

I would also like to give my suggestions.
From few days i am using locally available CA with Biofoam/Depron. But the trick here is let the CA get more viscous in the bottle itself(keep the bottle for month or 2 in new condition), use when the the viscosity is little bit less than that of hot glue. You will find amazing results. I have used in construction of all my bio foam planes and the joints are strong.

Sorry i forgot to tell the reason. The reason here for CA not eating the foam is the aceton like content of CA gets evaporated in long run which makes it thicker. The Aceton part of CA is responsible for eating of foam. Any glue or paint that has contents of acetone or any thing from the family of Ketones will eat foam.

HI FLYERS,,,
 We all use different types of glue for different frame of our rc plane. if we use the rite glue for each frame. then our rc will fly for long time,,,
 So can you share your Idea about glues,,,? because i face lot of problem because i use cyno for all frames,,,, it holds well but life is less,,,

Merged above post into existing discussion.

Bala - Please use the "Search" option before posting, as your query may already have been discussed in detail.

There is a good discussion of glues used for balsa and coro builds in this thread :

http://www.rcindia.org/beginners-zone/aeromodelling-wing-help/

[Admin Note] Cross posting useful information !

Sorry for the bump.

I tried sticking two pieces of Coroplast (advertisement boards) 2mm thick using Araldite standard Epoxy Glue. I mixed the two pastes (Resin glue and hardener) and applied. I stuck two pieces this way.
I stuck two other pieces the same way as above but after rubbing the two pieces with a sandpaper.
But neither were strong after 4 hours. Do I need to wait more? Or wasn't it the right glue?

Standard Araldite requires 24 hours to set.

I have Araldite instant/clear and they take 4-10 mins and stick very nicely and good

Has anyone tried this?? Decoration glue from Fevicol... It states "Ideal for use with Thermocole"...It is sold in Stationery shops...

@Satya - Good stuff. Also Fevitie Rapid gives same results.

@Alok - I use this regularly on depron/themocole.

Thanks. I will stick two more pieces for 24hrs.
@satyagupta: Thanks, I will try Araldite instant.

yo bro... 

@alokhovercraft

Fevicol Decoration glue not safe for thermacol

@ prshant

I have also used decoration glue safely. no problems with thermacol and depron.

help help need to know names for  best glue in india mumbai to glue deprom foam to depron foam fastest sticiking,eg. sticking wing ribs for cambered wings depron

i using this glue - http://www.hobbyking.com/hobbyking/store/__17534__Clear_Foam_Glue_Medium_Cure_Small_20g.html but problem is that once open then can't last long.  I am also looking for the safer glue which is available locally. 

cant seem to find uhu por in india any glue similar for foam like deporon,epp,styro