3M 45 spray adhesive

Doesn’t work with epoxy infusion. The results may have been different if using VER or PER. Either that or i may have used a little too much. I was careful about how much i sprayed onto the mold, but the epoxy resin did not disolve the spray adhesive. I’ll get 3M 77 next.

The epoxy I belive is fully cured on the demolded part. Do you think it’s safe to use acetone to wipe off the remaining spray glue on the part? It’s infused carbon fiber and glass.

IIRC 77 is a heavier bodied adhesive than 45. You’d have to go a lot easier with it. On flat parts you got gravity working with you so you shouldn’t need any unless you have to tuck in some sharp corners etc.

If you have to cut out those diamond shapes, test your acetone on the cut outs. Good idea to test your epoxy coating and polishing on the cut offs before you tackle the actual part.

Well that’s what I’d do I think! :wink:

sounds like a good idea Knotty. testing acetone on the cut out areas.

I wonder if the 3M 45 did not disolve into the epoxy is because i sprayed it about 3 days before doing the actuall infusion. Maybe it just can’t sit that long. yeah if 77 is heavier bodied then i may just be better off using even less of this 3M 45 next time around… and spray it within 20 -30 minutes of infusing. less time for it to become a solid. The 45 did work awesome for holding the fabric onto 90 degree up corners. I needed it for that. When i get some extra cash I’ll buy the Airtac2 spray adhesive. Yeah… i’ve thought about it and the epoxy kicked before all the nooks and crannies were fully infused. I won’t use hot water any more… just degass it in the pot like Hojo recomended. Hey… at least i’m learning :slight_smile:

I just got another sugestion from Hojo… great idea to use no spray adhesive and just set the fabric in place using minimum vacuum. I’m no pro, so i don’t know if i can do it that way myself, but it’s worth a try.

Knotty, I tested acetone on the part to clean off the glue residue… it works great. I’ll do it to the entire part tomorrow and then epoxy over the dry spots and the whole part before trimming it out. I don’t want to boast, but these parts are sweet, other ones i’ve bought were not as solid as these. This stuff is light too. I can’t wait to finish these up :smiley:

I think I’ll make some parts for my bike. I need a missing bracket… good part to try out.