what does 'stone' mean? color? or material its used on?

Stone is the color of the caulk. I used it in my pool where the copping joined the top row of tiles. It matched the color in the copping. You can purchase it in colors other than "stone." Hope this helps.

Is this product heat resistant?

It is made for outside use and I have used it to seal around replacement windows. I don't see anything on the label that specifies its heat resistance.

can i use this to fill gaps in my stone fireplace mantle and then paint it ?

Very good product for stone, this is not for beginners Very sticky, not shire what heat temperatures are

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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MasterSeal NP1 10.1 Oz. Polyurethane Sealant, Stone

Product ID: 14439147

Details

Brand
MasterSeal NP1
Color
Stone
Full Cure Time
24 Hours
Item Weight
10.1 Ounces
Liquid Volume
10.1 Fluid

⏳24h Full Cure Time

💧100% Waterproof

🛠️300 psi Tensile Strength

€ 54.23

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Seal smart, seal strong — MasterSeal NP1 keeps your projects flawless and future-proof!

DURABLE ELASTICITY - Maintains permanent flexibility to withstand expansion and contraction without cracking.
NO FUSS APPLICATION - One-component, gun-grade formula with no mixing or priming needed for most surfaces.
TRUSTED PERFORMANCE - Backed by BASF quality and a 4.6-star rating from nearly 200 pros.
SEAMLESS VERSATILITY - Perfect for active joints on walls, floors, windows & more—interior or exterior.
STONE COLORED SOPHISTICATION - Blends effortlessly with natural stone and masonry for a clean, professional finish.

MasterSeal NP1 is a high-performance, moisture-curing polyurethane sealant designed for demanding construction needs. Offering 300 psi tensile strength and full waterproofing, it cures in 24 hours and bonds effortlessly to concrete, masonry, aluminum, and wood without priming. Ideal for both vertical and horizontal joints, it delivers permanent elasticity and a stone color that complements natural materials, making it the go-to sealant for professionals seeking durability and ease.

Specifications

ASIN	B00UMWTB8I
Best Sellers Rank	#114,207 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #301 in Adhesive Caulk
Brand	MasterSeal NP1
Brand Name	MasterSeal NP1
Color	Stone
Customer Reviews	4.6 out of 5 stars 199 Reviews
Full Cure Time	24 hours
Item Form	Liquid
Item Weight	10.1 ounces
Liquid Volume	10.1 fluid ounces
Manufacturer	BASF
Material Type	Polyurethane
Number of Items	1
Number of Packs	1
Part Number	NP1STONE
Surface Recommendation	Floor,Wall,Walls,Window
Tensile Strength	300 psi
Unit Count	1 Count
Water Resistance Level	Waterproof

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