It contains binders and additives that make it dry faster with less shrinkage. Spackle is very similar to drywall mud, but this term indicates a premixed mud that is made to repair small holes. Contractors prefer pre-mixed, so be sure to specify dry mix. The most sensitive should use the powdered form. If the mix contains calcium sulfate hemihydrate (gypsum) or plaster then they also contain additional chemicals. Reduced dust or low dust drywall mud can include a wax or oil and a surfactant.īiocides should be expected in all pre-mixed formulations. Lightweight compounds can contain glass microspheres or expanded perlite. This type typically contains polyvinyl acetate, ethylene-vinyl acetate, or acrylic vinyl acetate polymer (or a combination). I have found it does offgas VOCs, and certainly more than the dry mix alternative. The powder form is always preferred to the pre-mixed for those avoiding toxins.īut even pre-mixed can be found in extremely low-VOC formulations. Source, Source, & Source Pre-Mixed (aka Ready-Mix or Drying Type) Asbestos is no longer added to drywall mud and is not found as a contaminant either.Thickening agents include hydroxyethyl cellulose/starch, methylcellulose, natural gums such as gum arabic.Polyoxyethylenearyl is a plasticizer for the polyvinyl acetate.New muds can contain polyvinyl acetate (PVA) and soluble polyvinyl alcohol. Dry mix drywall mud traditionally contained casein or soy protein as the binder.Topping compound usually contains vinyl acetate.All-purpose compound usually contains clay.These are limestone, mica, attapulgite, quartz, and talc. The main mineral components of drywall mud are known as the fillers.If you are chemically sensitive I would compare samples from different brands. Though it can be difficult to find a conventional brand dry mix All-Purpose compound. ![]() I’m not convinced there is a difference between Murco and brands from the hardware store like USG, when it comes to All-Purpose and Setting Type compound. If your contractor won’t use a dry mix, this is a good one.ĭry mix joint compound does not usually contain biocides or fillers that would be declared as VOCs on the SDS. USG Topping compound is ready mix but it is only 2 g/l VOC, close to zero. This is used for final coats, not for embedding the tape. Topping compound is used in finishing layers and it contains vinyl acetate. Setting type is used with fiberglass tapes. Murco makes HA 100 which is also a setting type compound. This is a conventional brand joint compound for the seams that you can easily find at hardware stores and even on Amazon. You can also use Easy Sand as a spackle, to fix minor holes. Get a small amount on Amazon to test it out. I like USG Sheetrock Brand Lightweight Setting-Type Joint Compounds EASY SAND 20, as well as 30, 45, 90, 210, 300. ![]() This is the drywall mud referred to as hot mud. I don’t have a problem with more conventional brands of all-purpose compound if they are dry mix.įor mudding the seams you can also use a setting type. They claim no preservative/biocide, no vinyl, and only inert fillers. This one is marketed towards the chemically sensitive. I used Murco All-Purpose as a joint compound and found it totally tolerable. ![]() This type has the least amount of additives. Powdered drywall muds are zero-VOC, but they can still contain additives that could be bothersome for some.Īll-Purpose type compound is used as the first step (and can be the only type used) in setting the tape in the seams. Emergency Housing for Chemical and Mold Sensitivity.How I Recovered from Chemical Sensitivities.How “High Performance” can Help Prevent Mold.
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