Can this be applied with a syringe?

Durham's Water Putty can be diluted to anything from a very thick paste.... to something about the consistency of milk. So Yes... it could be applied with a syringe. Now, how strong that might be when it dries, is something that I cannot speak to. "Probably" it would be hard and strong, but perhaps not. I often mix Durham's Water Putty with lightweight spackle (about 50/50) and then dilute it a bit with water. This makes a great, easily sandable filler for balsa wood....If you are not familiar with this product, it comes as a dry powder (similar to pancake mix)... and you dilute it with water to suit your application...

Does this only come in white? I need to fill knot holes in a wood floor and wanted a dark color

I have mixed the putty with the stain instead of water, you can stain after if it needs to be darker

Can this be used on a rotted porch step if primed/painted after? One post says you need to add resin for hardening. Do you ? Tks!

Yes, absolutely! I used this product on a severely rotted window frame. I mixed the batter to the consistency of soft ice cream. Using a spackle knife I packed the putty into the rotted area and let dry 24 hours to cure. In the morning, I sanded, primed and painted it. This was three years ago, still looks great and it never leaked once.

Can it be injected into rotted wood

The rotted wood must be treated with a product designed to "coat" affected area. The rotted wood that can be removed with, for example, a wire brush must be done. If the entire wood member is rotted it cannot be repaired. After treatment with the rotted wood product Durhams may be used as a "filler".

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DURHAM'S Rock Hard Water Putty - 4lb Container

DURHAM'S Rock Hard Water Putty - 4lb Container

Product ID: 12614241

Details

Brand
DURHAM'S
Item Form
Powder
Material
Cement-Based
Special Feature
Strong Bonding
Specific Uses For Product
Wall Repair

🏡Indoor/outdoor versatile use

💧Water-activated, ready instantly

🛠️Strong bonding power

A$41

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Fix it once, fix it rock hard—because your space deserves the best!

GENEROUS 4 LB SUPPLY - Enough putty to tackle all your repair projects with confidence
UNMATCHED DURABILITY - Never shrinks, ensuring flawless, long-lasting repairs
EFFORTLESS ACTIVATION - Just add water and mix—no fuss, no wait
MULTI SURFACE MASTERY - Seamlessly repairs wood, plaster, stone, tile, and concrete
PRO GRADE VERSATILITY - Perfect for both indoor finesse and outdoor resilience (just paint!)

DURHAM'S Rock Hard Water Putty is a gypsum-based powder that transforms into a rock-solid filler when mixed with water. Designed for professional-grade repairs on wood, plaster, stone, tile, and concrete, it offers superior bonding strength without shrinking. Ready to use indoors or outdoors (with a protective paint layer), this 4-pound container delivers reliable, long-lasting fixes for holes and cracks, making it the go-to choice for millennial managers who demand durability and efficiency in their home improvement toolkit.

Specifications

ASIN	B000LNS2LU
Best Sellers Rank	#168,112 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #215 in Wood Filler
Brand Name	DURHAM'S
Color	White
Compatible Material	Concrete, Stone, Wood
Container Type	Can
Customer Reviews	4.7 4.7 out of 5 stars (1,806)
Global Trade Identification Number	00076694000046
Included Components	water putty
Item Form	Powder
Item Package Quantity	1
Item Type Name	water putty
Item Weight	4.2 pounds
Manufacturer	RH Brands, Inc.
Material Type	Cement-Based, Gypsum-Based
Model	76694000046
Number of Pieces	1
Other Special Features of the Product	Strong Bonding, Does Not Shrink, Versatile Applications
Part Number	169
Specific Uses For Product	Wall Repair, Repair, Woodworking, Wood, Furniture, Tile Repair, Masonry
UPC	076694000046
Unit Count	64 Ounce
Viscosity Level	Medium to High
Volume	4 liters
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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