If the crack is close fitting and tight, then a water thin solvent cement
may be best, as it will "wick" into the crack to provide a maximum surface
area bond.

http://www.craftics.com/products.cfm?Category=80

The cement you mention is good too, as it has an acrylic filler it should be
better for bonding slight gaps.

In any case, it is advisable to remove the window track before gluing to
prevent glue getting on the canopy proper - - it will mar clear plexi if it
gets on the wrong spot. To help prevent this, the water thin solvent cement
is best applied with a syringe or similar as it takes very little.

bumper

McMaster Carr is also a source for this cement.
"Jim Vincent" wrote in message
. ..
On my canopy side vent, one of the brackets broke where it meets the
rectangular vent. I tried super glue, epoxy, plexi sealant from
Lowe's...no luck.

Fixed it beautifully using Weld-On glue, available from
http://www.stewmac.com/shop/Glues,_a...t.html#details

Glue is $5.10 plus $8.25 shipping.