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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Description

🛠️ Fix it once, fix it right — the pro’s secret weapon!

READY WHEN YOU ARE - Mixes instantly with water for fast, hassle-free application indoors or outdoors.
GENEROUS 4 LB CAPACITY - Enough volume to tackle multiple projects without constant repurchasing.
WEATHER RESISTANT FINISH - Keep outdoor fixes flawless with paintable, water-resistant durability.
UNMATCHED BONDING STRENGTH - Creates rock-solid repairs that last, no shrinkage guaranteed.
VERSATILE SURFACE COMPATIBILITY - Perfect for wood, drywall, stone, tile, concrete & more—one putty to rule them all.

DURHAM'S Rock Hard Water Putty is a premium gypsum-based resin filler that hardens to a durable, non-shrinking finish. Ideal for professional-grade repairs on wood, plaster, drywall, stone, tile, and concrete, this 4lb container offers easy water-mix application and strong bonding strength. Suitable for both indoor and outdoor use (paint required outdoors), it delivers reliable, long-lasting results for managers and makers who demand quality and efficiency.

Specifications

Brand	DURHAM'S
Specific Uses For Product	Wall Repair, Repair, Woodworking, Wood, Furniture, Tile Repair, Masonry
Material	Resin
Item Form	Putty
Special Feature	Strong Bonding, Does Not Shrink, Versatile Applications
Colour	White
Item Package Quantity	1
Package Information	Pail
Item Volume	4 Litres
Viscosity	Medium to High Viscosity
Water Resistance Level	Water Resistant
Net Quantity	1892.7 millilitre
UPC	076694000046
Number of Pieces	1
Global Trade Identification Number	00076694000046
Manufacturer	RH Brands, Inc.
Country of Origin	USA
Model number	76694000046
Number of Memory Sticks	1
Item Weight	1 kg 910 g
Product Dimensions	12.7 x 12.7 x 21.08 cm; 1.91 kg
Item model number	76694000046
Item Height	8.3 Inches
Item Width	5 Inches
Included Components	water putty
Are batteries included?	No

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