COLOURTREE Mastiff Artificial Grass Carpet
Wait for manufacturer to disclose coating chemistry and PFAS status.
Artificial grass typically uses waterproofing and stain-resistant coatings on backing, which commonly contain PFAS. GlobalTex won't disclose PFAS content or treatment chemicals.
The better-graded swap
Realgrass
RealGrass Classic 5 ft. x 10 ft. Artificial Grass //sq. ft.
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
polyethylene grass fibers with unspecified backing/adhesive coatings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What COLOURTREE Mastiff Artificial Grass Carpet is made of, ingredients and materials
COLOURTREE Mastiff uses polyethylene (PE) fibers for the grass pile, a common synthetic chosen for durability and UV resistance. The critical unknown is the backing and adhesive system, which typically contains polyurethane, latex, or epoxy resins that may off-gas volatile organic compounds (VOCs) or contain flame retardants. Without manufacturer disclosure of these coatings, chemical composition remains opaque, making full safety assessment impossible.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Flame retardants
Synthetic grass backings commonly incorporate brominated or phosphorus-based flame retardants; GlobalTex does not disclose whether COLOURTREE Mastiff uses them. If present, they may leach or off-gas, particularly in high-temperature or humid conditions.
Source, EPA ↗VOC off-gassing from adhesives and backing
Polyurethane and epoxy-based backing adhesives are routine in this product class and typically release VOCs during installation and early use. New carpet smell indicates active emissions; no independent testing of this specific product's VOC profile is publicly available.
Backing material degradation and leachables
Artificial grass backings can degrade over 5-10 years, especially in UV-exposed or humid environments, potentially releasing adhesive components or backing particles. Long-term leaching behavior of this product's unspecified adhesive is unknown.
Microplastic shedding
Polyethylene grass fibers shed microplastics over time, particularly under foot traffic or weathering. This is a known concern for artificial grass in general; no brand-specific data on shedding rate is available for COLOURTREE Mastiff.
Mold and bacterial growth in backing (maintenance-dependent)
Moisture retention in backing materials can support mold and bacterial colonies if not properly ventilated or drained. Risk is higher in high-humidity or poorly ventilated indoor installations.
How is this PFAS grade calculated?
The brand's record and disclosure
GlobalTex maintains minimal public chemical transparency for this product line. No third-party certifications (e.g., FloorScore, Greenguard) are advertised. The brand does not publicly disclose PFAS testing, backing adhesive chemistry, or flame retardant use, which is atypical for brands competing on safety. This silence on ingredient sourcing is the primary barrier to confident recommendation.
How it compares in its category
Artificial grass carpets as a category carry standard flame retardant and VOC risks; COLOURTREE Mastiff offers no visible differentiation toward lower-emission construction. Premium competitors (e.g., certain FieldTurf or ForeverLawn products) often carry environmental certifications or published backing specifications. Budget artificial grass typically shares these disclosure gaps, so this product sits in a crowded middle tier without competitive safety clarity.
If you buy it
Ventilate heavily during and after installation; off-gassing is most intense in the first 48-72 hours. Keep away from direct heat sources and high-temperature surfaces, as PE fibers can degrade and release particles. Avoid use in enclosed, unventilated spaces (e.g., basement without airflow). Inspect the backing annually for adhesive breakdown or mold growth, especially in humid climates, and replace if degradation is visible.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- COLOURTREE has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to COLOURTREE Mastiff Artificial Grass Carpet?
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- VOC off-gassing from polyurethane or latex adhesive
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34 Oz Padded Gym Artificial Turf
- polyethylene turf fibers, polypropylene backing
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- VOC off-gassing from polyethylene and polypropylene
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- Flame retardants
4 hazards checked on this product, all on its full breakdown.
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How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.