Extreme Block Interior/Exterior Stain Blocking Alkyd Primer

Flat · White · Exterior primer8Bad

VOC g/L: 338
Sheen: Flat
Base: White
Warnings: 5

Maker's page

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Health score

8Bad

Main concerns

Cancer warning-15Contains Methyl Ethyl Ketoxime N-Butan-2-ylidenehydroxylamine, bis(2-ethylhexanoate), a suspected carcinogen present in the paint itself, not only as dust.
Reproductive warning-15Suspected of damaging fertility or the unborn child.
Skin allergen-8May cause an allergic reaction.

Indoor air0 of 40 pointsWeak

VOC level, VOC added by tint, emissions testing

High VOC0338 g/L VOC in the untinted base, per the maker's environmental data sheet.

Tint VOC not disclosed0The maker does not state how much VOC colorants add when tinted.

Fails emissions standard0Maker's compliance table: LEED emissions "No."

Ingredient hazards0 of 35 pointsWeak

Warnings on the Safety Data Sheet

Flammable-3Keep away from heat and flames.

Skin allergen-8May cause an allergic reaction.

Cancer warning-15Contains Methyl Ethyl Ketoxime N-Butan-2-ylidenehydroxylamine, bis(2-ethylhexanoate), a suspected carcinogen present in the paint itself, not only as dust.

Reproductive warning-15Suspected of damaging fertility or the unborn child.

Aspiration hazard-3May be fatal if swallowed and enters airways.

Transparency8 of 15 pointsFair

How fully the maker lists ingredients

Good disclosure+8Publishes an environmental data sheet with its full list of volatile ingredients.

Independent verification0 of 10 pointsWeak

Health certifications confirmed with the certifier

No ingredient certification0No independent ingredient or health certification found (for example Asthma & Allergy Friendly or Green Seal).

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Scores summarize the evidence makers publish. They don't guarantee safety or predict individual health outcomes. How we score

How this compares to other exterior primers

Health scoreTop 95%Scores higher than 5% of 61 products

VOCHigherLower VOC than 13% of products

Healthier options

Same use and flat sheen, higher score.

Ingredients the maker lists

From the Safety Data Sheet, which names ingredients that carry a hazard classification.

Light Aliphatic Hydrocarbon10-30%
Titanium Dioxide10-30%
Amorphous Diatomaceous Earth1-5%
Lt. Aliphatic Hydrocarbon Solvent1-5%
Hydrotreated Heavy Petroleum Naphtha0.1-1%
Xylene, mixed isomers0.1-1%
o-Xylene 1,2-Xylene0.1-1%
Methyl Ethyl Ketoxime N-Butan-2-ylidenehydroxylamine0.1-1%
bis(2-ethylhexanoate)0.1-1%
Zirconium 2-Ethylhexanoate0.1-1%

Product details

Product number: B49W00600
Barcodes: 035777873700, 035777873731, 035777881200
Sizes: 1 Quart, 1 Gallon, 5 Gallon
VOC (untinted): 338 g/L
Hazard classes: Flammable liquids cat 3; Skin sensitization cat 1; Carcinogenicity cat 2; Toxic to reproduction cat 1b; Aspiration hazard cat 1
Safety Data Sheet: Revised 8/18/2026

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Sources

Safety Data Sheet (rev. 8/18/2026)Environmental data sheet Product data sheet Product page

Preliminary score, method v1.0. Product photo from the maker, shown for identification.