Loctite 515 Sealant question

[kmckee]

I am rebuilding a 787 Rotax engine. When joining the crankcase halves, the service manual recommends the use of Loctite 515 sealant on the bolt screw threads. I am using Threebond 1211 sealant for the mating surfaces. Is this an acceptable alternative to use on the bolt screw threads as well?

 

[chipmcod]

Loctite® Gasket Maker 515™ Flange Sealant is a flexible, gasketing material for use on rigid machined flanges with less than 0.015" gap. OEM approved ™ use where OEs specify 515 or ™anaerobic™ gasket (cures in absence of air). Eliminates preformed, pre-cut, paper, rubber and cork gaskets. 1200 Series (Silicone-based liquid gasket and potting agents)

Threebond 1211


This silicone-based liquid gasket fills gaps on a flange surface and thus completely prevent leaks. When cured, it forms an excellent rubber-like elastic body offering excellent resistance to vibration and shock. Also it has an excellent resistance to heat, and effectively seals joints that are subjected to high temperature. Select the product that best meets the needs for a particular location or set of working conditions.

seems like they do the same thing except threebond is meant for crankcase reassembly ( the mating surfaces not hte bolts.)