Foaming/spraying for drywood termites

A few questions from Santa Cruz, CA:
1) Are there any foaming agents that have been approved for use with Premise, Termidor, or Bora-Care in California? (I see that neither Masterline Foam nor Termitafoam has been approved.)
2) Does foaming or spraying Premise, Termidor, or Bora-Care into wall voids stand a reasonable chance of penetrating well enough to kill active but as yet undetected drywood termite infestations?
3) Does foaming or spraying Premise, Termidor, or Bora-Care into wall voids protect the entire height of the studs from drywood termite reinfestation or does the chemical settle so that only the support beam and the lower portion of the studs are protected?
4) If there is insulation, will foaming or spraying into the upper part of the void protect the upper part of the studs or does it generally settle to the bottom?
Thanks in advance to all,
Mike
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Mike,
Try posting this at:
alt.building.construction OR alt.trades.construction.us
Mike wrote:

--
MZ

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