ngfan
Active Member
Posts: 20
|
Post by ngfan on Nov 19, 2021 16:30:37 GMT
Well the test piece looks pretty good. Subjectively the adhesion between the polyurethane sealant and the brass seems much better than with a silicone sealant. I've therefore gone ahead and used it to seal all the large (say >5 thou) gaps in the tank. I'll leave it a week or so, then use one of the fuel tank sealants that have been recommended above to finish the job.
I'm anticipating success, the big question now is how it performs after a few year's usage. John
|
|
Gary L
Elder Statesman
Posts: 1,208
|
Post by Gary L on Nov 19, 2021 16:55:22 GMT
Well the test piece looks pretty good. Subjectively the adhesion between the polyurethane sealant and the brass seems much better than with a silicone sealant. I've therefore gone ahead and used it to seal all the large (say >5 thou) gaps in the tank. I'll leave it a week or so, then use one of the fuel tank sealants that have been recommended above to finish the job. I'm anticipating success, the big question now is how it performs after a few year's usage. John It will be fine, provided (like all adhesives) you stick the parts using overlaps of reasonable area. The cured polyurethane has very good adhesion, and respectable strength and elasticity, and once set it will last forever. By contrast, silicone rubber is a hopeless adhesive and a barely adequate sealant, as anybody who has tried to use it on their bath surround eventually finds out! The bonus is, it (polyurethane) won’t interfere with paint adhesion. Gary
|
|