Impco Inc.'s WeldSeal
is a high-performance brush-on methacrylate compound formulated for sealing
porosity in welds that will contain gases under pressure or liquids. WeldSeal's low dynamic viscosity enables it
to wick deeply into pores, seams and between close-fitting ferrous metal
surfaces. After WeldSeal has cured in
the porosity or voids, excess material on the surface is rinsed away with water,
leaving the surface clean and ready for painting or other operations. WeldSeal does not alter critical surface
WeldSealcomes packaged in a 250ml kit with a shelf life of 6-12 months. Mixing the sealant's two components creates a
VOC-free, low-viscosity, pale blue liquid that can be easily applied by
brush. Once mixed, WeldSeal has an
extended pot life of about one day, allowing multiple parts to be treated from
the same kit. Drawing a vacuum improves
penetration. WeldSeal's unique chemistry
allows cleanup of parts, tools and brushes with water - no detergents or
solvents are required. Cured WeldSeal forms
a pressure-tight mass that withstands continuous service temperatures of up to
179C (355F). Parts treated with WeldSeal
have been tested leak-free at over 150psi.
Cured WeldSeal has a typical hardness of 95 Shore D (ASTM D2240) and exhibits
resistance to a broad range of chemicals, including oils, glycol, chlorinated
and fluorinated solvents, mild caustics, acid solutions and water.
A simple new chemical method for repairing and recycling notoriously difficult carbon fiber composites has been developed by the Fraunhofer Institute for Applied Polymer Research. An entire component can be completely recycled, including reclaiming its expensive carbon fibers for reuse.
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