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A full chip out does not generally need or require a bond coat to be applied. However, there is no harm in doing so, and in fact, may improve the bonding of the new plaster coat. There may be bond coat products that aren't as good as others. But for the most part, bond coats generally help and improve bonding, but are not necessary with a full chip out. So I like the contractor that recommends a bond coat.
We're remodeling and doing a full chip out before plaster. On bond coats. I've been warned to not let a contractor use a "home brew," or the SGM product because this does not have a warranty and would ruin the manufacturer's warranty of the plaster. Worse, it can cause delamination. We are doing...
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