The Church of Scotland's social care arm has said personal protective equipment (PPE) must be made available to all residential care home staff immediately.
Most recent guidance advises residents in long term care not to be admitted to hospitals, but to receive care management "within their current setting".
CrossReach, which runs over 35 residential care services across the country, says it is "unfair and unjust" for care staff and volunteers working with the sick and vulnerable to do so unprotected.
Chief executive officer Viv Dickenson said: "Our exceptional and dedicated staff are being asked to do what they can but would you want to care for someone with the virus without protection for you, your family and other residents?
"Whilst NHS supplies have been prioritised we have seen arrangements for the care sector lag behind and the supply chain dry up.
"We understand arrangements are being made but have not yet seen the detail and the clock is ticking.
"Personal protective equipment in the care sector is non-negotiable and we hope that the Scottish Government will acknowledge this immediately and act quickly to stop the spread of the virus and protect staff and residents."
CrossReach is appealing to the public to donate overalls, disposable gloves and facemasks to help carers stay protected.