Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Adhesive for GRP
Anyone know if gap filling adhesives such as Gripfill and Pink Grip
can be used on fibreglass? If not, what can be? Thanks Rob |
#2
|
|||
|
|||
Steve Firth wrote:
The usual gap filling ahdesive used on GRP is epoxy filled with glass microballoons. Most GRP is styrene, not epoxy. If you are filling styrene based GRP, you really need to use styrene based filler - otherwise adhesion isn't great. The majority of car body fillers are styrene based, and so work well on GRP. -- Grunff |
#3
|
|||
|
|||
On Tue, 24 Aug 2004 12:21:24 +0100, Kalico wrote:
If not, what can be? Polyester resin - car body filler, you need to abrade the existing fibreglass surface first and if you use a coating of polyester resin & hardener and allow it to semi harden before filling with polyester filler you will achieve stronger results. -- Peter Parry. http://www.wpp.ltd.uk/ |
#4
|
|||
|
|||
Steve Firth wrote:
Most GRP is styrene, Polyster. Nit picking - styrene monomer which polymerises to polyester. Plenty of free styrene left over. No, that's not true. Polyester resin doesn't adhere as well as epoxy to cured polyester. Epoxy will always provide a good bond, *provided* that you clean away the moul release agents from the surface. Roughen and swab with acetone before attempting a repair. Hmm, gotta say that has not been my experience, but I've only dabbled, so I'm prepared to take your word for it. -- Grunff |
#5
|
|||
|
|||
On Tue, 24 Aug 2004 13:36:26 +0100, Peter Parry
wrote: On Tue, 24 Aug 2004 12:21:24 +0100, Kalico wrote: If not, what can be? Polyester resin - car body filler, you need to abrade the existing fibreglass surface first and if you use a coating of polyester resin & hardener and allow it to semi harden before filling with polyester filler you will achieve stronger results. Yikes! Lots of very technical answers. I am less concerned with the strength of bond, since it is not for anything critical. More that I would hate to apply something which would then dissolve a hole into the bottom of my boat! Thanks for all advice - I really appreciate it. Hell, there is certainly some good knowledge on this group. Rob |
#6
|
|||
|
|||
Kalico wrote:
On Tue, 24 Aug 2004 13:36:26 +0100, Peter Parry wrote: On Tue, 24 Aug 2004 12:21:24 +0100, Kalico wrote: If not, what can be? Polyester resin - car body filler, you need to abrade the existing fibreglass surface first and if you use a coating of polyester resin & hardener and allow it to semi harden before filling with polyester filler you will achieve stronger results. Yikes! Lots of very technical answers. I am less concerned with the strength of bond, since it is not for anything critical. More that I would hate to apply something which would then dissolve a hole into the bottom of my boat! Oh - Boat? Normal prtactice would be to file degrease and roughen as described elsewhere, and then use glass cloth with probably polyester rather than epoxy to fill any structurally weak areas, and epoxy and microballoons or indeed car body filler to get everything nice and smooth. Thanks for all advice - I really appreciate it. Hell, there is certainly some good knowledge on this group. Rob |
#7
|
|||
|
|||
On Tue, 24 Aug 2004 23:21:16 +0100, Kalico wrote:
Yikes! Lots of very technical answers. I am less concerned with the strength of bond, since it is not for anything critical. More that I would hate to apply something which would then dissolve a hole into the bottom of my boat! Thanks for all advice - I really appreciate it. Hell, there is certainly some good knowledge on this group. Hi, Have a look at: http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&q=group%3Arec.boats.building+epoxy+polyester http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&q=group%3Arec.boats.building+fibreglass+repair&b tnG=Search Epoxy gives a much better bond than polyester BTW. cheers, Pete. |
#8
|
|||
|
|||
"Pete C" wrote in message ... snip Epoxy gives a much better bond than polyester BTW. Little confused here, the OP was asking about 'gap filling' not bonding, the original reply from 'Grunff' that suggested Auto body filler would be OK is correct / if / it is gap filling that is required, but if the OP wants to bond then Epoxy should be used. |
#9
|
|||
|
|||
On Wed, 25 Aug 2004 11:07:17 +0100, ":::Jerry::::"
wrote: "Pete C" wrote in message .. . snip Epoxy gives a much better bond than polyester BTW. Little confused here, the OP was asking about 'gap filling' not bonding, the original reply from 'Grunff' that suggested Auto body filler would be OK is correct / if / it is gap filling that is required, but if the OP wants to bond then Epoxy should be used. All I need to do is glue a wooden block to the inside of the hull. Attached to the block will be a metal eye to tie a bungee cord to that will be tied at the other end to a locker lid. Just to stop it falling overboard really so does not need to be that strong. The block has previously been glued to the hull by someone else but has come off. My first reaction was to bang some Gripfill in there as it is cheap and would accommodate the slightly concave hull shape to the flat block. I just didn't want to damage the hull. Also, do you know if Gripfill (or similar) will bond to stainless steel? Thanks for all your advice. Rob |
#10
|
|||
|
|||
On Wed, 25 Aug 2004 12:52:50 +0100, Kalico wrote:
All I need to do is glue a wooden block to the inside of the hull. Attached to the block will be a metal eye to tie a bungee cord to that will be tied at the other end to a locker lid. Just to stop it falling overboard really so does not need to be that strong. The block has previously been glued to the hull by someone else but has come off. My first reaction was to bang some Gripfill in there as it is cheap and would accommodate the slightly concave hull shape to the flat block. I just didn't want to damage the hull. Also, do you know if Gripfill (or similar) will bond to stainless steel? Hi, Try asking the makers of Gripfill whether it will do, I wouldn't mind hearing what they say. Whatever you use you'd need to grind off any paint or left over glue back to bare fibreglass to get a good key. To make epoxy gap filling just thicken it with something, see archives of rec.boats.building for some ideas. Will this be indoors out of the weather or not? cheers, Pete. |
#11
|
|||
|
|||
On Wed, 25 Aug 2004 18:13:51 +0100, Pete C
wrote: On Wed, 25 Aug 2004 12:52:50 +0100, Kalico wrote: All I need to do is glue a wooden block to the inside of the hull. Attached to the block will be a metal eye to tie a bungee cord to that will be tied at the other end to a locker lid. Just to stop it falling overboard really so does not need to be that strong. The block has previously been glued to the hull by someone else but has come off. My first reaction was to bang some Gripfill in there as it is cheap and would accommodate the slightly concave hull shape to the flat block. I just didn't want to damage the hull. Also, do you know if Gripfill (or similar) will bond to stainless steel? Hi, Try asking the makers of Gripfill whether it will do, I wouldn't mind hearing what they say. Whatever you use you'd need to grind off any paint or left over glue back to bare fibreglass to get a good key. To make epoxy gap filling just thicken it with something, see archives of rec.boats.building for some ideas. Will this be indoors out of the weather or not? cheers, Pete. Well, it may catch the odd bit of water but otherwise will not be getting wet too much. I shall ask Evode. Replace 'spam' with 'org' to reply |
#12
|
|||
|
|||
"Kalico" wrote in message ... snip Is there any reason why you can't laminate this mount onto the hull, in other words, use GRP mesh and resin in the same way as the boat will have been built IYSWIM ? It wont be as quick as using a bonding glue but it will be stronger if done correctly. |
#13
|
|||
|
|||
On Wed, 25 Aug 2004 22:24:15 +0100, ":::Jerry::::"
wrote: "Kalico" wrote in message .. . snip Is there any reason why you can't laminate this mount onto the hull, in other words, use GRP mesh and resin in the same way as the boat will have been built IYSWIM ? It wont be as quick as using a bonding glue but it will be stronger if done correctly. The only reason that Gripfil sprung to mind is that I have used it extensively before with excellent results whereas I have absolutely no experience with glassfibre. Rob Replace 'spam' with 'org' to reply |
#14
|
|||
|
|||
On Wed, 25 Aug 2004 22:01:15 +0100, Kalico wrote:
Well, it may catch the odd bit of water but otherwise will not be getting wet too much. I shall ask Evode. Hi, Had a quick search and found a list of materials and a data sheet on the makers web site: http://www.laybond.net/gripfill/features.htm http://www.laybond.net/data/laybond/gripfill_ds.pdf Would probably work OK, but if you can paint or coat the wood and the area round it sometime that would be better. cheers, Pete. |
#15
|
|||
|
|||
On Thu, 26 Aug 2004 13:06:38 +0100, Pete C
wrote: On Wed, 25 Aug 2004 22:01:15 +0100, Kalico wrote: Well, it may catch the odd bit of water but otherwise will not be getting wet too much. I shall ask Evode. Hi, Had a quick search and found a list of materials and a data sheet on the makers web site: http://www.laybond.net/gripfill/features.htm http://www.laybond.net/data/laybond/gripfill_ds.pdf Would probably work OK, but if you can paint or coat the wood and the area round it sometime that would be better. cheers, Pete. That's excellent - thanks very much Pete. Rob Replace 'spam' with 'org' to reply |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
adhesive for carpet grippers | Home Repair | |||
Sticky situation - adhesive question .. oh ha ha (sorry) | UK diy | |||
Remove Old Floor Adhesive? | Home Repair |